Answers
The probability that a randomly selected point on AK will be on CD is given as follows:
2/10 = 0.2 = 20%.
How to calculate a probability?The parameters that are needed to calculate a probability are listed as follows:
Number of desired outcomes in the context of a problem or experiment.Number of total outcomes in the context of a problem or experiment.Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes.
The length of AK is given as follows:
10 - (-10) = 20 units.
The length of CD is given as follows:
-4 - (-6) = 2 units.
Hence the probability is given as follows:
2/10 = 0.2 = 20%.
Learn more about the concept of probability at https://brainly.com/question/24756209
#SPJ1
Answer:
20 os the ans hope it helps. pls mark me brain list :D
Related Questions
1. Explain the main concept of the moment of a force around a point and indicate how the direction of its rotation is governed
2. Explain the double integration method for the calculation of statically determinate beams
3. Indicate the reinforcement analysis procedure by the analytical method of sections
4. Describe the moment-area theorem for the calculation of statically determinate beams
Answers
The moment of a force around a point, also known as the torque, measures the tendency of the force to cause rotation about that point.
It is a vector quantity defined as the product of the force and the perpendicular distance from the point to the line of action of the force.
Mathematically, the moment of a force (M) can be calculated as M = F * d * sin(θ), where F is the magnitude of the force, d is the perpendicular distance from the point to the line of action of the force, and θ is the angle between the force and the line connecting the point and the line of action of the force.
The direction of rotation governed by the moment of a force depends on the direction of the force and the orientation of the axis of rotation. The right-hand rule is commonly used to determine the direction of rotation.
The double integration method is a technique used for analyzing statically determinate beams to determine the internal forces, such as shear force and bending moment, at various points along the beam.
In this method, the first integration of the shear force equation gives the equation for the bending moment, and the second integration of the bending moment equation gives the equation for the deflection of the beam.
The reinforcement analysis procedure by the analytical method of sections is used in structural engineering to determine the internal forces in reinforced concrete beams and columns.
Check the design of the reinforcement for strength and serviceability requirements, considering factors such as concrete and steel material properties, code provisions, and structural analysis results.
If the reinforcement design does not meet the requirements, iterate the process by modifying the section or reinforcement until a satisfactory design is achieved.
The moment-area theorem is a method used for analyzing statically determinate beams to determine the slope and deflection at specific points along the beam. It relates the area under the bending moment diagram to the displacement and rotation of the beam.
The moment-area theorem states that the change in slope at a point on a beam is proportional to the algebraic sum of the areas of the bending moment diagram on either side of that point.
Similarly, the deflection at a point is proportional to the algebraic sum of the areas of the moment diagram multiplied by the distance between the centroid of the area and the point of interest.
This method is particularly useful for determining the response of a beam subjected to various loading conditions without the need for complex integration.
To more about torque, visit:
https://brainly.com/question/17512177
#SPJ11
Example 3: A wide rectangular channel with a manning number of 0.02 coveys a discharge of 3m3/s/m. There are two long reaches with different bed slopes. The first reach (upper) has a slope of 1:20 while that for the second reach (lower) is 1:800. Determine: a) The normal depth of flow on each reach b) Critical depth of flow c) Whether a hydraulic jump will occur. d) The conjugate depths of a jump occurred on the lower reach e) The energy head and the power lost in the jump
Answers
The normal depth of flow on the upper reach is 1.53 m and on the lower reach is 4.18 m.
The critical depth of flow on the upper reach is 1.99 m and on the lower reach is 7.72 m.
How to calculate the depth of flowTo calculate depth of flow
We are given the following data:
Discharge (Q) = 3 [tex]m^3/s/m[/tex]
Manning's roughness coefficient (n) = 0.02
Upper reach bed slope (S1) = 1:20
Lower reach bed slope (S2) = 1:800
Normal Depth:
Normal depth can be calculated using the Manning's equation for uniform flow as
[tex]Q = 1/n A(y)^2/3 S^1/2[/tex]
where A is the cross-sectional area of flow and S is the bed slope.
For the upper reach
S1 = 1/20 = 0.05
Area of flow[tex](A_1) = Q / (n S1 yn^2/3) = (3) / (0.02 * 0.05 * yn^2/3)[/tex]
The hydraulic radius (R₁) in terms of depth (y₁) is given by
[tex]R_1 = A_1 / P_1 = (Q / (n S_1 yn^2/3)) / (2 yn / 0.5) = (3 / (0.02 * 0.05 * yn^2/3)) / (4 yn / 0.5)[/tex]
yn₁ = 1.53 m
For the lower reach
S₂ = 1/800 = 0.00125
Area of flow[tex](A_2) = Q / (n S_2 yn^2/3) = (3) / (0.02 * 0.00125 * yn^2/3)[/tex]
The hydraulic radius (R2) in terms of depth (y2) is given by
[tex]R_2 = A_2 / P_2 = (Q / (n S_2 yn^2/3)) / (2 yn / 2) = (3 / (0.02 * 0.00125 * yn^2/3)) / (2 yn / 2)[/tex]
yn₂ = 4.18 m
Thus, the normal depth of flow on the upper reach is 1.53 m and on the lower reach is 4.18 m.
Critical Depth:
Critical depth can be calculated using the following equation:
[tex]yc = (Q^2 / g S)^1/3[/tex]
where g is the acceleration due to gravity.
For the upper reach
[tex]yc_1 = (3^2 / (9.81 * 0.05))^(1/3) = 1.99 m[/tex]
For the lower reach
[tex]yc_2 = (3^2 / (9.81 * 0.00125))^(1/3) = 7.72 m[/tex]
Hence, the critical depth of flow on the upper reach is 1.99 m and on the lower reach is 7.72 m.
Hydraulic Jump:
It can calculated using the following equation:
[tex]Fr = V / (g yn)^1/2[/tex]
where V is the velocity of flow.
For the upper reach
[tex]V_1 = Q / A1 = (3) / ((0.02 * 0.05 * 1.53^2/3)) = 2.74 m/s[/tex]
[tex]Fr_1 = V1 / (g yn1)^1/2 = 2.74 / (9.81 * 1.53)^1/2 = 0.59[/tex]
Since Fr1 is less than 1, a hydraulic jump will not occur on the upper reach.
For the lower reach, the velocity can be calculated as
[tex]V_2 = Q / A2 = (3) / ((0.02 * 0.00125 * 4.18^2/3)) = 5.93 m/s[/tex]
[tex]Fr_2 = V2 / (g yn2)^1/2 = 5.93 / (9.81 * 4.18)^1/2 = 1.34[/tex]
Since Fr2 is greater than 1, a hydraulic jump will occur on the lower reach.
Conjugate Depths of Jump:
The conjugate depths of the jump (y₁ and y₂) can be calculated using the following equations:
[tex]y_1 = yc^2 / (4 yn2)\\y_2 = 2.5 yn2 - 1[/tex]
Substituting the values
[tex]y_1 = (7.72^2) / (4 * 4.18) = 4.47 m\\y_2 = 2.5 * 4.18 - 1 = 9.45 m[/tex]
Therefore, the conjugate depths of the jump are 4.47 m and 9.45 m.
Energy Head and Power Loss in Jump:
The energy head before and after the jump can be calculated as
[tex]E_1 = y_1 + V_1^2 / (2g)\\E_2 = y_2 + V_2^2 / (2g)[/tex]
Substituting the values
[tex]E_1 = 4.47 + (2.74^2) / (2 * 9.81) = 5.58 m\\E_2 = 9.45 + (5.93^2) / (2 * 9.81) = 12.78 m[/tex]
The energy head lost in the jump is:
ΔE = E₁ - E₂2 = 5.58 - 12.78 = -7.20 m
Since the energy head is lost, the power loss in the jump can be calculated as
P = ΔE × Q = -7.20 × 3 = -21.6 kW
Therefore, the energy head lost in the jump is 7.20 m and the power loss is 21.6 kW.
Learn more on hydraulic jump on https://brainly.com/question/28507220
#SPJ4
Using only the theorems on determinants and the row/column operations, show that: 1 1 1 a b C = (b − a)(c − a)(c - b) la² b² c² DO NOT use Cofactor Method or the diagonal method. Indicate your name in your MANUAL solution and upload here.
Answers
To show that (b - a)(c - a)(c - b) = la² b² c² using only the theorems on determinants and the row/column operations, we can proceed as follows:
1. Start with the given matrix:
| 1 1 1 |
| a b c |
2. Subtract the first row from the second row:
| 1 1 1 |
| 0 b-a c-a |
3. Multiply the second row by b-a:
| 1 1 1 |
| 0 (b-a)(c-a) (b-a)(c-a) |
4. Now, factor out (b-a) from the second row:
| 1 1 1 |
| 0 (b-a)(c-a) (c-b)(b-a) |
5. Multiply the second row by c-b:
| 1 1 1 |
| 0 (b-a)(c-a) (c-b)(c-a)(b-a) |
6. Now, we can see that the determinant of the matrix is equal to the desired expression:
| 1 1 1 |
| 0 (b-a)(c-a) (c-b)(c-a)(b-a) | = (b-a)(c-a)(c-b)
Thus, we have shown that (b - a)(c - a)(c - b) = la² b² c² using only the theorems on determinants and the row/column operations.
I hope this explanation helps! Let me know if you have any further questions.
To know more about row/column operations ,click here -https://brainly.com/app/ask?q=row%2Fcolumn+operations
#SPJ11
Using the theorems on determinants and the row/column operations, we can show that the given matrix [tex]\left[\begin{array}{ccc}1&1&1\\a&b&c\\a^2&b^2&c^2\end{array}\right][/tex] equals [tex](b-a)(c-a)(c-b)[/tex].
To start, we expand the determinant along the first row:
[tex]\left[\begin{array}{ccc}1&1&1\\a&b&c\\a^2&b^2&c^2\end{array}\right] = 1\cdot\left|\begin{array}{cc}b&c\\b^2&c^2\end{array}\right| - 1\cdot\left|\begin{array}{cc}a&c\\a^2&c^2\end{array}\right| + 1\cdot\left|\begin{array}{cc}a&b\\a^2&b^2\end{array}\right|[/tex]
Using the theorem that states "If we interchange two rows (or columns), the sign of the determinant changes", we can simplify further by expanding each determinant along the first row:
[tex]\left[\begin{array}{ccc}1&1&1\\a&b&c\\a^2&b^2&c^2\end{array}\right] = (b\cdot c^2 - b^2\cdot c) - (a\cdot c^2 - a^2\cdot c) + (a\cdot b^2 - a^2\cdot b)[/tex]
Applying the theorem that states "If a row (or column) of a determinant is multiplied by a constant, the determinant is also multiplied by that constant", we can further simplify:
[tex]\left[\begin{array}{ccc}1&1&1\\a&b&c\\a^2&b^2&c^2\end{array}\right] = bc^2 - b^2c - ac^2 + a^2c + ab^2 - a^2b[/tex]
Finally, factoring out common terms, we obtain:
[tex]\left[\begin{array}{ccc}1&1&1\\a&b&c\\a^2&b^2&c^2\end{array}\right] = (b-a)(c-a)(c-b)[/tex]
To learn more about determinants refer:
https://brainly.com/question/30835847
#SPJ11
2a) Assuming the sound source emits sound waves with a power output of 60 W. (i) Find the intensity at 10 m away from the source. (ii) Find the distance at which the sound pressure level is 58 dB when reference sound intensity is 1×10^−12 (Watts /m^2 ).
Answers
The reference sound intensity is 1×10^-12.Intensity is defined as the amount of sound energy passing per second through unit area perpendicular to the direction of sound propagation.
The formula for intensity is:
I = (P / 4πr²)
Where P = Power output of the source
= 60W.
r = Distance from the source
= 10
mπ = 3.14
Substituting the values in the formula we get,
I = (60 / 4 × 3.14 × (10)²)≈ 0.48 W/m²
Therefore, the intensity at 10 m away from the source is 0.48 W/m².(ii) Calculation of the distance at which the sound pressure level is 58 dB when reference sound intensity is 1×10^-12 (Watts /m^2 ).The formula for sound pressure level (SPL) is given as: we get:r ≈ 257 m .Therefore, the distance at which the sound pressure level is 58 dB when the reference sound intensity is 1×10^-12 (Watts /m^2) is approximately 257 m.
To know more about area perpendicular visit:
https://brainly.com/question/29089041
#SPJ11
The distance at which the sound pressure level is 58 dB when the reference sound intensity is 1×10^-12 (Watts /m^2) is approximately 257 m.
The reference sound intensity is 1×10^-12.
Intensity is defined as the amount of sound energy passing per second through unit area perpendicular to the direction of sound propagation.
The formula for intensity is:
I = (P / 4πr²)
Where P = Power output of the source
= 60W.
r = Distance from the source
= 10
mπ = 3.14
Substituting the values in the formula we get,
I = (60 / 4 × 3.14 × (10)²)≈ 0.48 W/m²
Therefore, the intensity at 10 m away from the source is 0.48 W/m².(ii) Calculation of the distance at which the sound pressure level is 58 dB when reference sound intensity is 1×10^-12 (Watts /m^2 ).
The formula for sound pressure level (SPL) is given as: we get:r ≈ 257 m .
Therefore, the distance at which the sound pressure level is 58 dB when the reference sound intensity is 1×10^-12 (Watts /m^2) is approximately 257 m.
To know more about distance visit:
brainly.com/question/29089041
#SPJ11
Communication 4. Explain how the concepts of transformations can be used to identify or confirm exuivalent trigonometric expressions? You may use sine and cosine as an example of transformation. [4]
Answers
Transformations can be used to identify or confirm equivalent trigonometric expressions by manipulating the given expressions using trigonometric identities and properties.
Trigonometric transformations involve applying various trigonometric identities and properties to manipulate expressions and prove their equivalence. One commonly used example of a transformation involves working with the sine and cosine functions.
The fundamental relationship between sine and cosine is defined by the Pythagorean identity: sin^2(x) + cos^2(x) = 1.
To identify or confirm equivalent trigonometric expressions, we can start by simplifying each expression separately using trigonometric identities. Then, by applying transformations such as substitution, simplification, or rewriting, we can manipulate the expressions to match or prove their equivalence.
For instance, let's consider the expression sin(x) * cos(x). We can use the double angle identity for sine to transform this expression into (1/2) * sin(2x), which is an equivalent expression.
By employing a series of transformations, we can work with various trigonometric identities to simplify and manipulate expressions until they are equivalent. These transformations enable us to uncover relationships, make connections between different trigonometric functions, and verify the equality of expressions.
Learn more about Transformations
brainly.com/question/11709244
#SPJ11
Which costly, time-consuming studies are always needed for products requiring a Premarket Approval, AND what is the purpose of these studies?
Answers
The costly, time-consuming studies always needed for Products Requiring Premarket Approval are Preclinical Studies, Clinical Trials, Quality Control Testing.
Preclinical Studies are the studies that happens in the laboratory and are tried on animals before human trials. The purpose of animal trial is to ensure preliminary data on the product's pharmacology, toxicology, and potential risks.
Clinical Trials are trials of testing the products on human subjects under control conditions. These trials are done to ensure product safety and optimal dosage. They have multiple phases and involve larger group of participants.
Quality Control Testing is used to test the product's quality, purity, stability, and consistency. It is done to ensure, the product meets the required specifications and maintain it's integrity.
The purpose of this data is to provide comprehensive scientific evidence and data to regulatory authorities, used to demonstrate the product's quality, purity, stability. These studies are used to know the risks and benefit of the product, identify the side effects and make sure that product meets the required specifications and maintain it's integrity.
To study more about PMA:
https://brainly.com/question/28146962
#SPJ4
The hourly cost of a hydraulic shovel is $165 and of a truck is $75. If an equipment fleet consisting of twoshovel and a fleet of ten trucks achieve a production of 700 LCY per hour, what is the unit cost of loading and hauling?
Answers
The given hourly cost of a hydraulic shovel and a truck are $165 and $75 respectively.
An equipment fleet consisting of two shovels and ten trucks achieve a production of 700 LCY per hour.
Now, we have to determine the unit cost of loading and hauling.
Let the unit cost of loading and hauling be X dollars per LCY.
From the given information, we can form the following equation:
Number of LCY loaded and hauled by two shovels in 1 hour + Number of LCY loaded and hauled by ten trucks in 1 hour
= 700 LCY/hour
To form the equation, we need to know the loading and hauling capacity of the shovel and truck.
The information given in the problem is not enough to solve for their loading and hauling capacity.
Hence, the equation cannot be formed.
Hence, the unit cost of loading and hauling cannot be determined.
To know more about cost visit:
https://brainly.com/question/32769580
#SPJ11
Assume that adults have IQ scores that are normaly distributed with a mean of 95.9 and a standard deviation 16.4. Find the first quartife Q1
which is the IQ 5 core separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartite is_________
Answers
The first quartile Q1 is 84.44 which separates the bottom 25% from the top 75%.
We have to find the first quartile Q1, which separates the bottom 25% from the top 75%.We know that for a normal distribution, the z-score is given as
z = (x - μ)/σ
where x is the IQ score.
Let Q1 be the IQ score below which the bottom 25% lie.So, the area to the left of Q1 is 0.25.
Thus, the corresponding z-score is given as:
z = invNorm(0.25) = -0.6745
Now, substituting the given values in the above equation, we get:-0.6745 = (Q1 - 95.9)/16.4
Q1 = -0.6745(16.4) + 95.9
Q1 = 84.44
To know more about standard deviation visit:
https://brainly.com/question/13498201
#SPJ11
A pair of 80-N forces is applied to the handles of the small eyelet squeezer. The block at A slides with negligible friction in a slot machined in the lower part of the tool. www.E (a) Neglect the small force of the light return spring AE and determine the compressive force P applied to the eyelet. 6.25 mm 80 N (b) If the compressive force P is to be doubled, what forces should be applied to the handles? Is there a linear relationship between input and output forces. If so, express this relationship. (c) Calculate the shear force and bending moment in member ABC at the section which is midway between points A and B. 62.5 mm 80 N 50 mm c 15 mm D.
Answers
(a) The compressive force applied to the eyelet is 160 N.
(b) To double the compressive force P, forces of 160 N should be applied to the handles. There is a linear relationship between the input and output forces.
(c) The shear force at the midpoint of member ABC is 80 N, and the bending moment at the same section is 120 N·mm.
(a) In this scenario, the two 80-N forces applied to the handles of the small eyelet squeezer generate a total force of 160 N. Since the block at A slides with negligible friction, the entire force is transferred to the eyelet. Thus, the compressive force applied to the eyelet is 160 N.
(b) To double the compressive force P, we need to determine the required forces applied to the handles. Since there is a linear relationship between the input and output forces, we can conclude that applying forces of 160 N to the handles will result in a doubled compressive force. The linear relationship implies that for every 1 N of force applied to the handles, the compressive force increases by 1 N as well.
(c) The shear force and bending moment in member ABC at the section midway between points A and B can be calculated. The given information does not provide direct data on the forces acting on member ABC, but we can assume that the compressive force P is evenly distributed along the length of the member.
Therefore, at the midpoint, the shear force will be half of the compressive force, resulting in 80 N. The bending moment at this section can be determined by multiplying the distance between the section and point B (15 mm) by the compressive force P, resulting in 120 N·mm.
Learn more about compressive force
brainly.com/question/32089056
#SPJ11
State and explain the three main steps in a chain reaction.
Answers
Overall, the three main steps in a chain reaction—initiation, propagation, and termination—work together to sustain and regulate the reaction. The initiation step starts the reaction, the propagation step continues the reaction through the generation of new reactive species, and the termination step stops the reaction by removing or neutralizing the reactive species. Understanding and controlling these steps is crucial in various chemical and nuclear processes.
In a chain reaction, which is a self-sustaining process that occurs in certain chemical reactions or nuclear reactions, there are typically three main steps: initiation, propagation, and termination.
1. Initiation:
The initiation step involves the generation of reactive species, such as free radicals or excited molecules, that are highly reactive and capable of initiating the chain reaction. This step often requires an external source of energy, such as heat, light, or the collision of particles. For example, in a radical chain reaction, initiation occurs when a molecule is broken down into two or more highly reactive radicals through the absorption of energy. This step sets the chain reaction in motion.
2. Propagation:
Once the chain reaction is initiated, the propagation step takes place. During this step, the reactive species generated in the initiation step react with other molecules, producing new reactive species. These newly formed reactive species then go on to react with additional molecules, propagating the chain reaction. In a chain reaction, each reactive species produced in the propagation step serves as a precursor to the formation of more reactive species, resulting in a self-perpetuating process.
3. Termination:
The termination step is the final stage of a chain reaction. It involves the removal or deactivation of the reactive species responsible for propagating the reaction. This can occur through various mechanisms, such as two reactive species colliding and neutralizing each other or a reactive species reacting with an inert species or a scavenger molecule. Termination prevents the continuous propagation of the chain reaction and brings the reaction to an end.
To know more about reaction visit:
brainly.com/question/30464598
#SPJ11
You have $450. 00 each month to pay off these two credit cards. You decide to pay only the interest on the lower-interest card and
the remaining amount to the higher interest card. Complete the following two tables to help you answer questions 1-2.
Higher-Interest Card (Payoff Option)
1
$1,007. 24
$8. 23
$447. 73
Month
Principal
Interest accrued
Payment (on due
date)
End-of-month
balance
Lower-Interest Card
Month
Principal
Interest accrued
Payment (on due
date)
End-of-month
balance
$567. 74
1
$445. 81
$2. 27
$2. 27
$445. 81
2
$567. 74
2
$445. 81
3
3
5
5
Answers
The payment for the higher-interest card was calculated by subtracting the interest accrued from the total amount available for payments ($450.00), which left a remainder of $441.77 to be applied towards the principal.
Higher-Interest Card (Payoff Option)
Month Principal Interest accrued Payment (on due date) End-of-month balance
1 $1,007.24 $8.23 $441.77 $573.70
Lower-Interest Card
Month Principal Interest accrued Payment (on due date) End-of-month balance
1 $567.74 $2.27 $8.23 $562.78
2 $562.78 $2.25 $8.23 $557.80
3 $557.80 $2.23 $8.23 $552.83
4 $552.83 $2.21 $8.23 $547.87
5 $547.87 $2.19 $8.23 $542.91
Note: The payment for the higher-interest card was calculated by subtracting the interest accrued from the total amount available for payments ($450.00), which left a remainder of $441.77 to be applied towards the principal.
Learn more about interest. from
https://brainly.com/question/25720319
#SPJ11
The design of a concrete mix has the following specification: Material Batch Mass (kg/m3) CEM I Cement 375 Fine aggregate 650 (saturated surface-dry condition) Coarse aggregate 1150 (saturated surface-dry condition) Total mixing water 180 However, the stockpiled coarse aggregate has a moisture content of 3.0% and an absorption of 1.5%; the fine aggregate has a moisture content of 4.5% and an absorption of 1.3%. Calculate to adjusted batch masses of materials which should be used.
Answers
The adjusted batch masses of materials are as follows:
Cement: 375 kg/m³
Fine aggregate: 658.34 kg/m³
Coarse aggregate: 1168.04 kg/m³
Total mixing water: 180 kg/m³
Calculate the effective moisture content for each aggregate:
Effective moisture content = Moisture content - Absorption
For the coarse aggregate:
Effective moisture content = 3.0% - 1.5%
= 1.5%
For the fine aggregate:
Effective moisture content = 4.5% - 1.3%
= 3.2%
Calculate the saturated surface-dry (SSD) mass for each aggregate:
SSD mass = Batch mass / (1 + (Effective moisture content / 100))
For the coarse aggregate:
SSD mass = 1150 / (1 + (1.5 / 100))
= 1150 / 1.015
= 1133.5 kg/m³
For the fine aggregate:
SSD mass = 650 / (1 + (3.2 / 100))
= 650 / 1.032
= 629.96 kg/m³
Adjust the batch masses of each material by considering the SSD mass:
Adjusted batch mass = SSD mass / (1 - (Moisture content / 100))
For the cement:
Adjusted batch mass = 375 / (1 - (0 / 100))
= 375 kg/m³
For the fine aggregate:
Adjusted batch mass = 629.96 / (1 - (4.5 / 100))
= 629.96 / 0.9555
= 658.34 kg/m³
For the coarse aggregate:
Adjusted batch mass = 1133.5 / (1 - (3.0 / 100))
= 1133.5 / 0.97
= 1168.04 kg/m³
Calculate the adjusted batch mass for the total mixing water:
Since the total mixing water is already provided as 180 kg/m³, there is no adjustment needed.
Therefore, the adjusted batch masses of materials are as follows:
Cement: 375 kg/m³
Fine aggregate: 658.34 kg/m³
Coarse aggregate: 1168.04 kg/m³
Total mixing water: 180 kg/m³
To know more about masses visit
https://brainly.com/question/20579920
#SPJ11
it is common for infants to fluctuate in weight Elise and Benjamin's baby lost 7 oz the first week and gained 10 oz the second week. Write a mathematical expression
Answers
The initial weight of Elise and Benjamin's baby as W0 (in ounces). We can represent the weight fluctuation as a mathematical expression using addition and subtraction.
The weight loss in the first week can be represented as "-7 oz" or "-7". We subtract 7 from the initial weight: W0 - 7.
Then, the weight gain in the second week can be represented as "+10 oz" or "+10". We add 10 to the weight after the first week: (W0 - 7) + 10.
Therefore, the mathematical expression for the weight fluctuation is:
(W0 - 7) + 10
This expression represents the baby's weight after the second week.
So, Elise and Benjamin's baby experienced a weight loss of 7 ounces in the first week and a weight gain of 10 ounces in the second week. The mathematical expression (W0 - 7) + 10 represents the baby's weight after the second week, where W0 represents the initial weight.
To more about fluctuation, visit:
https://brainly.com/question/30230686
#SPJ11
The data beloware the ages and annual pharmacy bills lin dollarsi of 9 randomly selected employees, Calculate the linear correlation coefficient. Select one a.908 b 0098 d 0.890
Answers
Therefore, the linear correlation coefficient is 0.908.
The given data below are the ages and annual pharmacy bills (in dollars) of 9 randomly selected employees.
To calculate the linear correlation coefficient, we need to use the formula:
r = [nΣXY - (ΣX)(ΣY)] / [√{nΣX2 - (ΣX)2} √{nΣY2 - (ΣY)2}]
Where, r = linear correlation coefficient
n = number of paired data points
ΣXY = sum of the product of the paired data points
ΣX = sum of the X data points
ΣY = sum of the Y data points
ΣX2 = sum of squared X data points
ΣY2 = sum of squared Y data points
Given data: 20, 3600, 22, 4000, 25, 4200, 28, 4600, 30, 4800, 32, 4900, 36, 5300, 40, 5800
ΣX = 273
ΣY = 31800
ΣX2 = 9279
ΣY2 = 17075200
ΣXY = 119518
r = [nΣXY - (ΣX)(ΣY)] / [√{nΣX2 - (ΣX)2} √{nΣY2 - (ΣY)2}]
r = [9(119518) - (273)(31800)] / [√{9(9279) - (273)2} √{9(17075200) - (31800)2}]
r = 0.908
Therefore, the linear correlation coefficient is 0.908.
To know more about linear correlation visit:
https://brainly.com/question/32755598
#SPJ11
(b) Using logarithmic differentiation, find y' if y = x³ 5² cosh7 4r.
Answers
y' = (x³ 5² cosh(7 4r)) * (3/x + sinh(7 4r) * 4)
This is the derivative of the function y with respect to x using logarithmic differentiation.
To find the derivative of the given function y = x³ 5² cosh(7 4r) using logarithmic differentiation, we'll take the natural logarithm of both sides:
ln(y) = ln(x³ 5² cosh(7 4r))
Now, we can use the properties of logarithms to simplify the expression:
ln(y) = ln(x³) + ln(5²) + ln(cosh(7 4r))
Applying the power rule for logarithms, we have:
ln(y) = 3ln(x) + 2ln(5) + ln(cosh(7 4r))
Next, we'll differentiate both sides of the equation with respect to x:
1/y * y' = 3/x + 0 + 1/cosh(7 4r) * d(cosh(7 4r))/dr * d(7 4r)/dx
Since d(cosh(7 4r))/dr = sinh(7 4r) and d(7 4r)/dx = 4, the equation becomes:
1/y * y' = 3/x + sinh(7 4r) * 4
Now, we can solve for y':
y' = y * (3/x + sinh(7 4r) * 4)
Substituting the value of y = x³ 5² cosh(7 4r), we have:
y' = (x³ 5² cosh(7 4r)) * (3/x + sinh(7 4r) * 4)
This is the derivative of the function y with respect to x using logarithmic differentiation.
Learn more about derivative
https://brainly.com/question/28376218
#SPJ11
Prove by using Boolean Identities that Boolean expression x(x+y) is equal to Boolean variable x.
Answers
To prove that the Boolean expression x(x+y) is equal to the Boolean variable x, we can use the distributive property and the identity property of Boolean algebra.
1. Start with the given expression: x(x+y).
2. Apply the distributive property: x * x + x * y.
3. According to the identity property, any variable multiplied by itself is equal to itself: x * x simplifies to x.
4. Simplify the expression: x + x * y.
5. Now, we can see that we have two terms, x and x * y, connected by the logical OR operator (+).
6. According to the Boolean identity property, if one of the terms connected by the logical OR operator is true (in this case, x is true), the result is true. Therefore, the expression x + x * y simplifies to x.
7. Thus, we have proven that the Boolean expression x(x+y) is equal to the Boolean variable x.
In summary, by applying the distributive property and the identity property of Boolean algebra, we can simplify the expression x(x+y) to x.
To learn more about Boolean expression solving:
https://brainly.com/question/32562730
#SPJ11
Q7. Consider Guided Activity 2, Part 2, Task C: Using the
equation for F from Task A, and plugging in our F value in Task C,
what is the value of E? Round your answer to the nearest whole
number.
Q8.
Answers
The value of E is 200 J, rounded to the nearest whole number. E can be calculated by the equation, E = Fd, where F = 10 N, and d = 20 m (distance moved by the object)
Guided Activity 2, Part 2, Task C requires using the equation for F from Task A and substituting the F value in Task C to calculate the value of E. The equation for F is F = ma.
Therefore,. Substituting these values into the equation, E = 10 x 20 = 200 J. The value of E is 200 J rounded to the nearest whole number. The force required to move an object is directly proportional to the mass of the object.
Thus, it is represented by the equation F = ma, where F is force, m is mass, and a is acceleration. If F is given as 10 N, E can be determined by using the equation E = Fd, where d is the distance moved by the object.
To know more about acceleration visit:
https://brainly.com/question/2303856
#SPJ11
Do public bodies have the unlimited right to determine which offeror is the "lowest responsible bidder"? Group of answer choices
A. Public bodies have the absolute right and discretion to award contracts for construction which are in the best interests of the taxpayers.
Answers
Public bodies do not have the unlimited right to determine which offeror is the "lowest responsible bidder".
Instead, public bodies have the absolute right and discretion to award contracts for construction which are in the best interests of the taxpayers. They are responsible for ensuring that they comply with the law and regulations when determining which offeror is the lowest responsible bidder.
What is the principle of the lowest responsible bidder?
The lowest responsible bidder principle states that the lowest bidder who can demonstrate their capability of effectively fulfilling all contractual responsibilities is awarded the contract.
It refers to the offeror who can offer the best value for money while still meeting the requirements of the tender specifications.
However, the public body cannot simply award the contract to the lowest bidder without determining whether they are responsible for meeting all of the requirements of the contract.
In this regard, the public body may consider a number of factors such as the offeror's experience, capacity, and financial capability when determining whether they are responsible enough to be awarded the contract.
It is essential to note that the public body should comply with all laws, regulations, and requirements when determining the lowest responsible bidder.
This is because they are responsible for ensuring that taxpayer dollars are used in the best interests of the public, and awarding contracts to offerors who are not capable of meeting their contractual obligations can lead to waste, fraud, or abuse of public funds.
To know more about lowest responsible bidder visit:
https://brainly.com/question/14816381
#SPJ1
Which of the following is equal to II 2i^2 ? a. 60 b. 64 c. 2^8 x 24^2 d. 2^4 x 24^2 e. 2 x 24^2 f. 48^2
Answers
The expression II 2i^2 is equivalent to one of the given options: a, b, c, d, e, or f. To simplify the expression II 2i^2, we need to evaluate it using the properties of exponents.
First, let's rewrite 2i^2 as (2i)^2. Then, using the property (ab)^n = a^n * b^n, we can simplify further:
(2i)^2 = 2^2 * (i)^2 = 4 * i^2.
Now, we need to determine the value of i^2. Since the options don't provide information about i, we can assume it is a constant. Therefore, i^2 is a constant value.
Looking at the given options, we can see that none of them match the simplified expression 4 * i^2. Therefore, none of the provided options is equal to II 2i^2.
Therefore, there is no correct option among the given choices (a, b, c, d, e, or f).
Learn more about Properties of exponents: brainly.com/question/3187898
#SPJ11
The expression II 2i^2 is equivalent to one of the given options: a, b, c, d, e, or f. To simplify the expression II 2i^2, we need to evaluate it using the properties of exponents.
First, let's rewrite 2i^2 as (2i)^2. Then, using the property (ab)^n = a^n * b^n, we can simplify further:
(2i)^2 = 2^2 * (i)^2 = 4 * i^2.
Now, we need to determine the value of i^2. Since the options don't provide information about i, we can assume it is a constant. Therefore, i^2 is a constant value.
Looking at the given options, we can see that none of them match the simplified expression 4 * i^2. Therefore, none of the provided options is equal to II 2i^2.
Therefore, there is no correct option among the given choices (a, b, c, d, e, or f).
Learn more about Properties of exponents: brainly.com/question/3187898
#SPJ11
Nitrous oxide (N20; N=N=0) is released from soils by biological processes. When it reaches the stratosphere, it reacts with atomic oxygen via elementary step: 1) N20 (6) + O (8) ► NO(g) + NO (8) Then, the NO produced gets involved with ozone in a two-elementary step process. 2) NO (B) + 03 (8) ► NO2(g) + O2 (8) 3) NO, (g) + O (8) ► NO (g) + O2 (g) 身 Write the rate law for reaction #1. Can you say what the order numbers are? Why or why not? For reaction 1, sketch a possible effective collision geometry, and a likely ineffective geometry. Explain in words what you are trying to show. From elementary steps 2 and 3, identify the reactants and products for the overall reaction. Explain how you figured that out. In any of the reactions 1,2,3, can any species be identified as a catalyst? Explain how you know. Can any species be identified as an intermediate? Explain how you know. Sketch WITH CARE a reaction progress diagram for reactions 2 and 3. Reaction 2 has an activation barrier of 12 kl. Reaction 3 is much faster than reaction 2. Overall, the reaction is exothermic. CHOOSE ONE OF THESE TO ANSWER 21. Reaction 1 is not important in the troposphere for removing N.O. Use the rate law and your knowledge of the composition of the atmosphere to argue why this is so in no more than a few sentences, 28 In the stratosphere, reaction 1 only represents how 5% of the nitrous oxide is destroyed. Suggest another potentially likely process that could destroy nitrous oxide that does NOT produce NO. Justify in a sentence or two.
Answers
Process that could destroy nitrous oxide without producing NO is photodissociation. Nitrous oxide is destroyed when exposed to ultraviolet radiation in the presence of other molecules in the atmosphere.
Rate laws are equations that describe the concentration of reactants' relationship with the reaction rate, which explains how fast the reaction proceeds.
Nitrous oxide (N₂O) is a greenhouse gas that is released from soils by biological processes. When it reaches the stratosphere, it reacts with atomic oxygen via elementary step:
N₂O (g) + O (g) -> NO (g) + NO (g) (reaction #1)
The rate law for reaction #1 can be given as:
Rate = k[N₂O] [O] where k is the rate constant, and the square brackets denote the concentration of the species in moles per liter. The reaction is a second-order reaction since its overall order is 2.
The collision geometry is illustrated below: A possible effective collision geometry occurs when the nitrogen molecule and oxygen molecule collide along the plane perpendicular to the page.
When the two molecules collide head-on, it is an unlikely ineffective collision.
From elementary steps 2 and 3, the reactants and products for the overall reaction can be identified as:
2NO(g) + O₂(g) -> 2NO₂(g) + O(g) (reaction #2)
NO(g) + O₃(g) -> NO₂(g) + O₂(g) (reaction #3)
The NO molecule acts as a catalyst in reaction #2 since it is formed in the first step and consumed in the second step. Species cannot be identified as an intermediate because an intermediate is a species that is produced in one step and consumed in a subsequent step.
The activation energy (EA) of reaction #2 is 12 kJ, which is illustrated in the figure below: Because reaction #3 is much faster than reaction #2, its activation energy is lower, and the reaction progress diagram is flatter. Reaction #3 is exothermic, and the energy of the products is less than that of the reactants.
In the troposphere, reaction #1 is not important for removing N₂O because there is much more oxygen than nitrous oxide. When it comes to the troposphere, it is a first-order reaction because oxygen is present in excess. Therefore, the rate of the reaction is dependent on the concentration of N₂O. In the stratosphere, reaction #1 represents only 5% of the nitrous oxide destruction because it is limited by the concentration of atomic oxygen. Another potentially likely process that could destroy nitrous oxide without producing NO is photodissociation. Nitrous oxide is destroyed when exposed to ultraviolet radiation in the presence of other molecules in the atmosphere.
To know more about exothermic visit:
brainly.com/question/28992656
#SPJ11
Pure water turns into a well-mixed tank filled with 100 Liter of brine. Water flows at a constant volumetric feed rate of 10 L/min. Initially, the brine has 7.0 kg of salt dissolved in the 100 Liter of water. The salt solution flows out of the tank at the same inlet volumetric flow rate of water. After 15 min of operation, calculate the amount of salt remaining in the tank (kg).
Answers
The amount of salt remaining in the tank after 15 minutes of operation is 3.86 kg.
Given that:
Volume of the tank = 100 Liters,
Flow rate of water = 10 L/min,
Time = 15 mins,
Concentration of salt initially = 7 kg/100 L of water
The mass balance equation for the salt in the tank is:
Mass in - Mass out = Rate of accumulation of salt in the tank
Initially, there is no salt in the tank.
The salt gets accumulated only when the brine starts entering the tank.
The amount of salt present in the tank after 15 minutes of operation is given by,
Mass in = 7 kg Mass out = (10 × 15) kg = 150 kg
Using the mass balance equation and the above values, we get:
7 - 150 = Rate of accumulation of salt in the tank
The rate of accumulationof salt in the tank = - 143 kg
After 15 minutes of operation, the salt concentration in the tank = (mass of salt in the tank / volume of tank)
= (7 - 143/60) kg/L
= 3.86 kg/100 L
The amount of salt remaining in the tank after 15 minutes of operation is 3.86 kg.
To know more about equation visit:
brainly.com/question/29657983
#SPJ11
How many moles of HCI will be produced from the complete reaction of 6.90 moles of CH4 as described in the following equation: CH4 + 4Cl2 ⇒ CCl4+ 4HCI
Answers
27.60 moles of HCl will be produced from the complete reaction of 6.90 moles of CH4 as described in the following equation: CH4 + 4Cl2 ⇒ CCl4+ 4HCI .
In the given balanced chemical equation:
CH4 + 4Cl2 ⇒ CCl4 + 4HCl
The stoichiometric ratio indicates that 1 mole of CH4 reacts with 4 moles of Cl2 to produce 4 moles of HCl.
Therefore, if 6.90 moles of CH4 completely react, we can calculate the moles of HCl produced using the stoichiometric ratio:
Number of moles of HCl = 4 moles of HCl × (6.90 moles of CH4 / 1 mole of CH4)
Number of moles of HCl = 4 × 6.90
Number of moles of HCl = 27.60
Thus, 27.60 moles of HCl will be produced from the complete reaction of 6.90 moles of CH4.
Learn more about complete reaction of moles
https://brainly.com/question/14579546
#SPJ11
[tex]27.6[/tex] moles of HCl will be produced from the complete reaction of [tex]6.90[/tex] moles of CH₄.
To determine the number of moles of HCl produced from the complete reaction of 6.90 moles of CH₄, we can use the stoichiometry of the balanced chemical equation:
[tex]\[CH_4 + 4Cl_2 \rightarrow CCl_4 + 4HCl\][/tex]
From the equation, we can see that 1 mole of CH₄ reacts with 4 moles of Cl₂ to produce 4 moles of HCl. This means that the mole ratio between CH₄ and HCl is [tex]1:4[/tex].
Given that we have 6.90 moles of CH₄, we can calculate the moles of HCl using the mole ratio:
[tex]\[\text{Moles of HCl} = Moles of CH_4 }\times \frac{4 \text{ moles HCl}}{1 mole CH_4} = 6.90 \times 4 = 27.6\][/tex]
Therefore, 27.6 moles of HCl will be produced from the complete reaction of 6.90 moles of CH₄.
Learn more about stoichiometry
https://brainly.com/question/28780091
#SPJ11
A sheet pile wall supporting 6 m of water is shown in Fig. P11.2. (a) Draw the flownet. (b) Determine the flow rate if k=0.0019 cm/s. (c) Determine the porewater pressure distributions on the upstream and downstream faces of the wit (d) Would piping occur if e=0.55 ? IGURE PT1.2
Answers
piping would not occur. c = void ratio at critical state
ϕ = angle of shearing resistance
Substituting the given values in equation (3), we get:
[tex]i_c = (0.55 – 1)tan(0)[/tex]
The pore water pressure at any point in the soil mass is given by the expression: p = hw + σv tanϕ ……(2)where,σv = effective vertical stressh
w = pore water pressureϕ = angle of shearing resistanceσv = σ – u (effective overburden stress)
p = total pressureσ = effective stressu = pore water pressure
From the figure shown above, the pore water pressure distributions on the upstream and downstream faces of the wall are given as below: On the upstream face: h
w = 6 m (above water level)p = hw = 6 m
On the downstream face:h[tex]w = 0p = σv tanϕ = (10)(0.55) = 5.5 md.[/tex]
The critical hydraulic gradient can be obtained using the following formula:
i_c = (e_c – 1)tanϕ ……(3
)where,e_
Critical hydraulic gradient is given as[tex],i_c = -0.45 < 0[/tex]
To know more about point visit:
https://brainly.com/question/32083389
#SPJ11
Whats an EQUATION that shows a population of 10,000 is growing at the rate of 5% per year?? PLEASE INCLUDE A GRAPH PLSS!
Answers
P(t) = P₀ * (1 + r)^t
Where:
P(t) represents the population at time t
P₀ represents the initial population (10,000 in this case)
r represents the growth rate (5% or 0.05 as a decimal)
t represents the number of years
Using this equation, we can calculate the population at different time points and create a graph to visualize the growth. Let's consider a time period of 10 years:
P(t) = 10,000 * (1 + 0.05)^t
To create a graph, we can plot the population (P) on the y-axis and the time (t) on the x-axis. Here's an example graph:
This graph will show the population starting at 10,000 and increasing exponentially over time with a growth rate of 5% per year.
Help me with this 9 math
Answers
The height of the cylinder is 4 feet.
How to find the height of a cylinder?The volume of a cylinder can be found as follows;
volume of a cylinder = base area × height
Therefore,
base area = πr²
volume of the cylinder = 48π ft³
base area = 12π ft²
Therefore, let's find the height of the cylinder as follows:
48π = 12π × h
divide both sides of the equation by 12π
h = 48π / 12π
h = 4 ft
Therefore,
height of the cylinder = 4 feet
learn more on volume here: https://brainly.com/question/28512386
#SPJ1
3. In case of water and glass, we get a concave meniscus because the adhesive force between water and glass are....... than the cohesive forces between water molecules a. Weaker b. Stronger c. Same d. None of the mentioned 4. One of the following has the highest surface tension a. Ethanol b. Water c. Ammonia d. Methanol
Answers
3. In the case of water and glass, we get a concave meniscus because the adhesive forces between water and glass are stronger than the cohesive forces between water molecules.
4. Water has the highest surface tension compared to ethanol, ammonia, and methanol.
3. When water comes into contact with glass, the adhesive forces between water molecules and the glass surface are stronger than the cohesive forces between water molecules.
Adhesive forces refer to the attraction between molecules of different substances, while cohesive forces refer to the attraction between molecules of the same substance.
The stronger adhesive forces cause the water to spread and cling to the glass surface, resulting in a concave meniscus.
4. Surface tension is the property of a liquid that determines the force required to increase its surface area. Among the given options, water has the highest surface tension. This is because water molecules exhibit strong cohesive forces due to hydrogen bonding.
Hydrogen bonding allows water molecules to strongly attract and stick to each other, leading to a high surface tension. Ethanol, ammonia, and methanol also have surface tension, but it is comparatively lower than that of water due to differences in intermolecular forces and molecular structure.
Learn more about molecular structure from the given link:
https://brainly.com/question/29857692
#SPJ11
A groundwater source is contaminated by Chemical X at a concentration of 38 µg/L. You are hired as an environmental engineer to decrease that concentration to 9 µg/L by adding activated carbon. According to the literature, the Freundlich isotherm coefficients for activated carbon are K₂ -0.04 and n = 2.1 for concentrations in mg/L. Calculate the mass of activated carbon (in mg) needed for 2 L of water. Enter your final answer with 2 decimal places. 0.183
Answers
The mass of activated carbon (in mg) needed for 2 L of water is 183 mg. Given, The initial concentration of Chemical X = 38 µg/L,Therefore, the mass of activated carbon (in mg) needed for 2 L of water is 183 mg.
The required concentration of Chemical X after treatment = 9 µg/L
The volume of water to be treated = 2L
The Freundlich isotherm coefficients for activated carbon are K₂ = 0.04 and
n = 2.1 for concentrations in mg/L.
We have to calculate the mass of activated carbon (in mg) needed for 2 L of water. Activated carbon is commonly used in water filtration processes, owing to its high surface area and capacity to adsorb a variety of organic and inorganic compounds.
Freundlich adsorption isotherm, a relationship that relates the amount of solute adsorbed to its equilibrium concentration in the solution, is frequently used to describe activated carbon adsorption.The Freundlich isotherm formula is: Q = Kf * C^(1/n Where Q = Mass of adsorbate adsorbed per unit weight of the adsorbent Kf and n are Freundlich constants = Concentration of adsorbate in solution first, we need to convert the initial and required concentration of Chemical X from µg/L to mg/L.
To know more about initial visit:
https://brainly.com/question/29046615
#SPJ11
The mass of activated carbon needed for 2 L of water is approximately 0.183 mg.
To calculate the mass of activated carbon needed to decrease the concentration of Chemical X in the groundwater source, we can use the Freundlich isotherm equation.
First, convert the concentrations to mg/L. 38 µg/L is equal to 0.038 mg/L, and 9 µg/L is equal to 0.009 mg/L.
The Freundlich isotherm equation is expressed as follows:
C = K * (1/m) * (X^(1/n))
Where C is the concentration of Chemical X in mg/L, K is the Freundlich isotherm coefficient, X is the mass of activated carbon in mg, m is the mass of water in L, and n is another coefficient.
In this case, we know that C₁ = 0.038 mg/L, C₂ = 0.009 mg/L, and m = 2 L. We are trying to find X.
To solve for X, we can rearrange the equation:
X = (C₂ / C₁)^(1/n) * K * m
Plugging in the values, we get:
X = (0.009 / 0.038)^(1/2.1) * -0.04 * 2
Calculating this, we find that the mass of activated carbon needed for 2 L of water is approximately 0.183 mg.
Learn more about mass
https://brainly.com/question/11954533
#SPJ11
Example 2 Water is placed in a piston-cylinder device at 20°C, 0.1MPa. Weights are placed on the piston to maintain a constant force on the water as it is heated to 400°C. How much work does the wat
Answers
The volume of water will remain constant, thus the work done by the water is zero.
Given that a water is placed in a piston-cylinder device at 20°C, 0.1 MPa.
Weights are placed on the piston to maintain a constant force on the water as it is heated to 400°C.
To find out how much work does the water do, we can use the formula mentioned below:
Work done by the water is given by,
W = ∫ PdV
where P = pressure applied on the piston, and
V = volume of the water
As we know that the force applied on the piston is constant, therefore the pressure P is also constant. Also, the weight of the piston is balanced by the force applied by the weights, thus there is no additional external force acting on the piston.
Therefore, the volume of the water will remain constant, thus the work done by the water is zero.
Know more about the piston-cylinder device
https://brainly.com/question/22587059
#SPJ11
Alicia estimates that the surface area of a rectangular prism with a length of 11 meters,a width of 5. 6 meters,and a height of 7. 2 meters is about 334 cubic meters. Is her estimate reasonable?Explain your reasoning
Answers
Alicia's estimate of the surface area of the rectangular prism is not reasonable based on her miscalculation of the volume.
To determine whether Alicia's estimate of the surface area of the rectangular prism is reasonable, we first need to check if her calculation of the volume of the rectangular prism is correct.
The formula for calculating the volume of a rectangular prism is:
Volume = length x width x height
Substituting the given values in the formula, we get:
Volume = 11 meters x 5.6 meters x 7.2 meters
Volume = 449.28 cubic meters
As we can see, Alicia's estimate of 334 cubic meters is significantly lower than the actual volume of the rectangular prism, which is 449.28 cubic meters. Therefore, her estimate of the surface area is likely to be incorrect as well.
It is also important to note that the problem statement asks about the estimate of the surface area, not the volume. However, since the formula for calculating the surface area of a rectangular prism also involves the dimensions of length, width, and height, it is highly likely that Alicia's estimate of the surface area would also be incorrect given her miscalculation of the volume.
In conclusion, Alicia's estimate of the surface area of the rectangular prism is not reasonable based on her miscalculation of the volume.
Learn more about volume from
https://brainly.com/question/27710307
#SPJ11
A 5.2 kg moving object's velocity is required to be changed from 9.6 m/s to 2.6 m/s over a distance of 7.3 m. Calculate the amount of force needed. Answer: ___N
Answers
The amount of force needed to change the velocity of the object is approximately 4.992 newtons (N).
To calculate the amount of force needed to change the velocity of an object, we can use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration. In this case, the mass of the object is given as 5.2 kg.
To find the acceleration, we can use the formula:
acceleration = (final velocity - initial velocity) / distance
Plugging in the values, we get:
acceleration = (2.6 m/s - 9.6 m/s) / 7.3 m
acceleration = -7 m/s / 7.3 m
acceleration ≈ -0.96 m/s²
Note that the negative sign indicates that the object is decelerating.
Now, we can calculate the force using Newton's second law:
force = mass × acceleration
force = 5.2 kg × (-0.96 m/s²)
force ≈ -4.992 N
Since force is a vector quantity, the negative sign indicates that the force is acting in the opposite direction of motion.
However, it's common practice to express the magnitude of force as a positive value. Therefore, the amount of force needed to change the velocity of the object is approximately 4.992 newtons (N).
Learn more about newtons
https://brainly.com/question/28171613
#SPJ11