Answer: Parietal lobe
Explanation: The parietal lobe controls the ability to read, write, and understand spatial concepts. Therefore, you gain the ability to process language through the left hemisphere of your brain.
Listed below are mostly vestigial structures. Select the one that serves a purpose in humans.
(1 point)
Responses
ear muscles: ability to wiggle ears in humans versus rotating ears to hear predators in prey animals like deer and rabbits
ear muscles: ability to wiggle ears in humans versus rotating ears to hear predators in prey animals like deer and rabbits
tail: tail bone in humans versus long tails for balance and communication in other animals like lizards and wolves
tail: tail bone in humans versus long tails for balance and communication in other animals like lizards and wolves
pelvis: supports upper body and attaches to lower body in humans versus being tiny and nonfunctional in legless animals like whales and snakes
pelvis: supports upper body and attaches to lower body in humans versus being tiny and nonfunctional in legless animals like whales and snakes
hair raising: goosebumps in humans versus raising hackles to appear larger and aggressive in other animals like cats and monkeys
The pelvis in humans serves a functional purpose by supporting the upper body and attaching it to the lower body. Other vestigial structures in humans include ear muscles, tail bone, and hair raising.
As humans evolved, the pelvis became increasingly important in supporting the weight of the upper body and allowing for efficient movement of the legs. In fact, the shape of the pelvis is one of the key factors that distinguishes humans from other primates, as it evolved to accommodate the unique demands of bipedalism. However, not all structures in the human body are as essential as the pelvis. Some, like the ear muscles and tail bone, have lost their original function over time. The ear muscles, for example, were once used to orient the ears towards sounds, but are no longer functional in most humans. Similarly, the tail bone, or coccyx, is a vestige of the tail that our primate ancestors once had, but which no longer serves any purpose in humans. Other vestigial structures in humans include the appendix, which may have once been used to digest a more plant-based diet, and the ability to raise our hair, which was likely used to intimidate predators but now only causes goosebumps.
Despite their lack of function, these vestigial structures continue to exist in humans due to their evolutionary history. And while they may not be essential to our survival, they serve as a reminder of our evolutionary past and the many adaptations that have made us the unique species we are today.
To know more about vestigial structures please refer: https://brainly.com/question/30458968
#SPJ1
a cart of mass 2.0 kg on a horizontal surface is attached to a horizontal spring of negligible mass. A 1.0 kg blockis secured on top of 2.0 kg cart.
The maximum potential energy of the system is equal to Kmax, so the answer is 2.16 J
How do we calculate?The maximum potential energy of a simple harmonic motion system is equal to the maximum kinetic energy, and they are both equal to half of the maximum total energy of the system.
We will first find the maximum total energy of the system.
we can see that the amplitude of the motion is approximately 0.4 m and the period is approximately 2.4 s.
The angular frequency of the motion :
ω = 2π/T
ω = 2π/2.4
ω = 5π/6 rad/s
The maximum kinetic energy of the system :
Kmax = (1/2)mv²max
vmax is approximately 1.2 m/s.
Kmax = (1/2)(2+1)(1.2)² = 2.16 J
Learn more about kinetic energy at:
https://brainly.com/question/8101588
#SPJ1
A 7.7 mF capacitor is charged by a 125 V battery
(Fig. a) and then disconnected from the battery.
When this capacitor C₁ is then connected (Fig. b) to a
second (initially uncharged) capacitor, C₂, the final
voltage on each capacitor is 15 V. What is the value
of C₂?
[Hint: charge is conserved]
(a)
C1
V
(b)
C1
C2
The value of C₂ is approximately 9.53 microfarads.
Using the conservation of charge, we can say that the total charge on the two capacitors before and after they are connected is the same.
The initial charge on the first capacitor, Q₁, can be calculated as:
Q₁ = C₁ * V
where V is the voltage of the battery (125 V).
When the two capacitors are connected in series, they have the same charge, so the charge on each capacitor is Q = Q₁ = C₁ * V.
The final voltage on each capacitor can be calculated using the formula for capacitors in series:
1/Ceq = 1/C1 + 1/C2
where Ceq is the equivalent capacitance of the two capacitors.
The final voltage on each capacitor is given as 15 V, so we can write:
Q = Ceq * Vf
where Vf is the final voltage on each capacitor (15 V).
Substituting Q = C₁ * V into the above equation and solving for C₂, we get:
C₂ = (C₁ * Vf) / (V - Vf)
Substituting the given values, we get:
C₂ = (7.7 × 10^-6 F × 15 V) / (125 V - 15 V) ≈ 9.53 × 10^-6 F
Therefore, the value of C₂ is approximately 9.53 microfarads.
What is capacitor?
A capacitor is an electrical component that stores electric charge and energy in an electric field between two conductive plates. It consists of two parallel conductive plates separated by an insulating material called a dielectric. When a voltage is applied to the capacitor, it charges up by accumulating electric charges on the two plates, with one plate becoming positively charged and the other negatively charged.
To know more about capacitor, visit:
https://brainly.com/question/29100869
#SPJ1
What is the speed of a rock that falls off a cliff for half a minute? How far does it fall before landing?
4,410 metres are travelled by the rock before it touches down. (or 4.41 kilometers).
How do you calculate a falling rock's speed?G = -9.81 m/s2 is the gravitational acceleration close to the earth. The acceleration of gravity is simply multiplied by the length of time to get an object's speed (or velocity) after a specific period of time.
Assuming the rock is dropped from rest, the variables are: initial velocity (u), acceleration due to gravity (g), time (t), and final velocity (v). Assuming the rock is dropped from rest, the initial velocity (u), acceleration due to gravity (g), and final velocity (v) are all equal to zero.
Using the equation v = u + gt, we can find the final velocity:
v = u + gt
v = 0 + 9.8 * 30
v = 294 m/s
As a result, the rock was moving at 294 m/s just before it landed.
We can use the equation to determine how far (s) the rock falls before landing:
s = ut + (1/2)gt²
where u, g, and t are the same as before.
s = ut + (1/2)gt²
s = 0 * 30 + (1/2) * 9.8 * (30)²
s = 4,410 meters
To know more about gravity visit:-
https://brainly.com/question/14874038
#SPJ9
A. How is it possible to look at geologic processes that shape Earth
today to learn about the past?
Geologic processes that shape Earth today, such as erosion, volcanic activity, and sedimentation, leave behind traces that can be studied to infer how similar processes may have occurred in the past. For example, by examining rock layers and formations, scientists can determine the sequence of events that led to their formation and the type of geologic activity that occurred. They can also study the chemical composition of rocks and minerals to determine the conditions under which they formed, such as temperature and pressure, which can provide clues to past environmental conditions. By comparing these observations with other data, such as fossil records, scientists can reconstruct a picture of Earth's history and the processes that shaped it over time.
Summarized:
The geologic processes that shape Earth today can provide clues to understand the past. For example, the study of rock layers can reveal the order in which they were formed and the conditions that existed at the time. Fossils in these rock layers can also give insight into the plants and animals that existed in the past. The study of plate tectonics, volcanoes, and earthquakes can also provide information about past events and how they shaped the Earth's surface. Overall, by studying the present-day geologic processes and their effects, scientists can make inferences about past events and understand the Earth's history.
Five point charges, each of charge +q are placed on five vertices of a regular hexagon of side 'l'. Find the magnitude of the resultant force on a charge -q placed at the centre of the hexagon. [CBSE 2019 (53/3/1)]
We can use Coulomb's Law to calculate the force exerted on the charge -q at the center of the hexagon by each of the five +q charges. The force exerted by a single charge is given by:
F = k * (q1*q2)/r^2
where,
k = Coulomb's constant
q1 and q2= charges of the two particles
r = distance between charges
Since all the +q charges are equidistant from the -q charge at the center of the hexagon, the magnitude of the force exerted by each charge is the same.
Let's call this force F1.
Angle between any two adjacent charges in the hexagon =60 degrees, so the force vector between each pair of charges is directed along a line connecting them and points towards the -q charge at the center.
Since there are five charges, the total force on the -q charge is the vector sum of the forces exerted by each charge. We can find the magnitude of this resultant force using the law of cosines:
F^2 = (5F1)^2 + (5F1)^2 - 2*(5F1)(5*F1)*cos(120)
Simplifying this equation gives:
F = sqrt(75)*F1
Distance between the center of the hexagon and each of the five charges= l,
and the charges are all +q, so we have:
F1 = k*q^2/l^2
Substituting this into the previous equation gives:
F = sqrt(75)kq^2/l^2
Therefore, the magnitude of the resultant force on the -q charge at the center of the hexagon is:
|F| = sqrt(75)kq^2/l^2
where k is Coulomb's constant, q is the charge of each particle, and l is the side length of the regular hexagon.
Read more about coulombs law on
https://brainly.com/question/26892767
CHAPTER 3 MAGNETIC FIELDS (CAPACITORS) QUESTION 1 The plates of a parallel capacitor are 5mm apart and 2m² in area. The plates are in a vacuum. A potential difference of 10,000V is applied across the capacitor. Calculate (a) The capacitance (c) the electric field in space between the plates capacitor (b) the charge on each plate (d) the energy stored in the capacitor
It follows that the energy held in the bank, 1 2 Q V, must equal the work done in dividing the plates from close to zero to d. E=V/d is the formula for electromagnetic current between the plates.
In physics, what is energy?
Energy is the ability to perform work in physics. It could exist in several different forms, such as dynamic, kinetic, heat, electrical, chemical, radioactive, etc. Moreover, there is heat and work, which is energy being transferred from one thing to the other. Energy is always assigned based on its nature after being transferred.
How does heat energy work?
Heat is the qualitative property in physics that needs to be delivered to a body or technical process in order to do work on it or to heat it. Energy can be transformed in form but cannot be created or destroyed, according to the rule of conservation of energy.
To know more about energy visit:
https://brainly.com/question/1932868
#SPJ9
Find the total translational kinetic energy of
1 L of oxygen gas held at a temperature of
6°C and a pressure of 2.5 atm.
Answer in units of J.
The total translational kinetic energy of 1 L of oxygen gas at 6°C and 2.5 atm is 833.7 J.
To find the total translational kinetic energy of 1 L of oxygen gas at 6°C and 2.5 atm, we can use the following formula:
KE = (3/2) * n * R * T
where KE is the total translational kinetic energy, n is the number of moles of gas, R is the gas constant (8.314 J/(mol*K)), and T is the temperature in Kelvin.
First, we need to find the number of moles of gas in 1 L at 2.5 atm and 6°C. We can use the ideal gas law to do this:
PV = nRT
where P is the pressure, V is the volume, and T is the temperature in Kelvin.
Converting 6°C to Kelvin, we get:
T = 6°C + 273.15 = 279.15 K
Substituting the given values into the ideal gas law, we get:
(2.5 atm) * (1 L) = n * (0.08206 Latm/(molK)) * (279.15 K)
Solving for n, we get:
n = (2.5 atm * 1 L) / (0.08206 Latm/(molK) * 279.15 K) = 0.108 mol
Now we can use the formula for KE:
KE = (3/2) * n * R * T = (3/2) * (0.108 mol) * (8.314 J/(mol*K)) * (279.15 K)
Solving for KE, we get:
KE = 833.7 J.
Learn more about kinetic energy here:
https://brainly.com/question/999862
#SPJ1
Two point charges are arranged in a straight line.
The point charge q1 has a charge of +7 μC . The point charge q2 is located 0.02 m to the left of q1 and has a charge of +2 μC.
What is the net electrostatic force on q2?
A: −2 μC to the right
B: 314.65 N to the left
C: 6.29 μC to the left
D: 700 N to the right
F = K ( | q1 × q2 | ) / r² is the formula you need
convert the value of the charge to the SI system by multiplying with 10^-6
so the task probably gives you coulombs constant but im gonna assume it's K= 9 × 10⁹ Nm²/C² because thats the common way to use it
so we have
F = 9 × 10⁹ ( 7 × 10^-6 × 2 × 10^-6)/ 0.02²
F = 315 N
so i guess the answer is B because your task must give you K=9. something × 10⁹
hope this helps, sorry if i dont make sense
Answer B is correct because the net electrostatic force on q2 is 314.65 N to the left.
What does "charge q1 q2 0" and "q1 q2 0" signify in terms of electric charge?In light of the fact that both the charge q1 and the other charge q2 are equal to zero. According to the equation, one charge is positive and the other is negative. Both charges are of similar size. This indicates that the two supplied charges on the system will add up to a total charge of zero.
[tex]F = k * |q1| * |q2| / r^2[/tex]
[tex]F = 9 x 10^9 * 7 x 10^-6 * 2 x 10^-6 / (0.02)^2[/tex]
[tex]F ≈ 314.65 N to the left[/tex]
To know more about electrostatic visit:-
https://brainly.com/question/31042490
#SPJ1
Ñame and describe piagets first stage of development, and give an example of a child’s behavior in this first stage
Consider different combinations of the Big Five, such as O (Low), C (High), E (Low), A (High), and N (Low). What would this person be like? Do you know anyone who is like this? Can you select politicians, movie stars, and other famous people and rate them on the Big Five?
The correct answer is The Big Five personality traits are Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. Each trait can be categorized as either high or low, resulting in 32 different combinations of the Big Five.
The combination of Low Openness, High Conscientiousness, Low Extraversion, High Agreeableness, and Low Neuroticism would suggest a person who is practical, detail-oriented, reserved, cooperative, and emotionally stable. While it is possible to speculate about how a person with this personality profile might behave in various situations, it is important to note that personality traits are not deterministic, and many other factors (such as culture, upbringing, and life experiences) can shape an individual's behavior. It is possible to rate politicians, movie stars, and other famous people on the Big Five using self-report questionnaires, behavioral observations, and other methods. However, it is important to keep in mind that such ratings may be influenced by personal biases and perceptions, and should be interpreted with caution. Additionally, the accuracy of such ratings depends on the quality and validity of the assessment tools used, as well as the rater's expertise and training in personality assessment.
To learn more about Conscientiousness, click on the link below:
brainly.com/question/30257990
#SPJ1
3.) A boat is moving south at 15.0, a passenger is walking north along the boat deck at 4.0 and throws a
rock north at 3.0, what is the velocity of the rock when viewed from the boat and the shore? (2)
QUESTION 16. Suppose you have a garden hose of diameter 2 cm and you use it to fill a 25 liters bucket/container. Suppose it takes you 1 minute to do that. Your answer (a) Calculate the speed at which the water enters the bucket. (2 marks) *
Answer:
0.4166666667 m/s
Explanation:
You are standing at the top of a cliff that has
a stairstep configuration. There is a vertical
drop of 5 m at your feet, then a horizontal
shelf of 9 m , then another drop of 5 m to the
bottom of the canyon, which has a horizontal
floor. You kick a 0.22 kg rock, giving it an
initial horizontal velocity that barely clears
the shelf below.
What initial horizontal velocity v will be
required to barely clear the edge of the shelf
below you? The acceleration of gravity is
9.8 m/s^2
Consider air friction to be negligible.
Answer in units of m/s.
B) How far from the bottom of the second cliff
will the projectile land?
Answer in units of m
Around 8.82 m/s of starting horizontal velocity is needed to just barely clear the shelf's edge. Around 8.99 metres from the base of the second cliff, the rock will land.
What is the equation for starting horizontal velocity?By multiplying the ball's diameter (d) by the amount of time (t) required for it to travel through the photogate, one may calculate the initial horizontal velocity of the object. Vo therefore equals d/t.
We can get the initial velocity necessary to raise the boulder to a height of 5 m using the kinematic equation:
Δy = V_iy*t + (1/2)a_yt²
We can find this time using the equation:
Δy = (1/2)a_yt²
where Δy = 5 m and a_y = 9.8 m/s².
Solving for t, we get:
t = sqrt(2Δy/a_y) = sqrt(25/9.8) ≈ 1.02 s
The initial horizontal velocity can be calculated using the rock's horizontal distance, time, and the equation: x = V ix*t, where x = 9 m and V ix represents the initial horizontal velocity.
Solving for V_ix, we get:
V_ix = Δx/t = 9/1.02 ≈ 8.82 m/s
B) Given that the rock has the same beginning vertical velocity and acceleration due to gravity, the time it takes to fall from the second cliff to the canyon's bottom is also around 1.02 s. The rock will move horizontally over the following distance:
Δx = V_ixt = 8.821.02 ≈ 8.99 m
To know more about velocity visit:-
https://brainly.com/question/14611467
#SPJ1
If a violin A4 string has a length of 35 cm and is tightened to a tension of 60 N, what mass density should the string have?
The mass density of the violin A4 string should be approximately 1800 kg/m^3.
The mass density of a string can be calculated using the following formula:
ρ = T / ((π/4) * d^2 * L)
where:
ρ is the mass density of the string in kg/m^3
T is the tension in Newtons (N)
d is the diameter of the string in meters (m)
L is the length of the string in meters (m)
π is the mathematical constant pi, approximately equal to 3.14159
We are given the length of the violin A4 string (L = 0.35 m) and the tension on the string (T = 60 N). We are asked to find the mass density of the string (ρ).
The diameter of the string (d) is not given, so we cannot solve for it directly. However, we can make an assumption about the diameter based on typical values for violin strings.
A common diameter for a violin A4 string is 0.6 mm, or 0.0006 m. We will use this value for d.
Now we can solve for ρ:
ρ = T / ((π/4) * d^2 * L)
ρ = 60 N / ((π/4) * (0.0006 m)^2 * 0.35 m)
ρ ≈ 1800 kg/m^3
Therefore, the mass density of the violin A4 string should be approximately 1800 kg/m^3.
What is mass density?
Mass density, also known as density, is a measure of how much mass is contained within a given volume of a substance. It is usually denoted by the Greek letter rho (ρ) and is expressed in units of kilograms per cubic meter (kg/m^3) or grams per cubic centimeter (g/cm^3).
To know more about mass density, visit:
https://brainly.com/question/6107689
#SPJ1
A roller coaster cart of mass 205.0 kg is pushed against a launcher spring with spring constant 600.0 N/m compressing it by 7.5 m in the process. When the roller coaster is released from rest the spring pushes it along the track (assume no friction in cart bearings or axles and no rolling friction between wheels and rail). The roller coaster then encounters a series of curved inclines and declines and eventually comes to a horizontal section where it has a velocity 6.0 m/s. How far above or below (vertical displacement) the starting level is this second (flat) level? If lower include a negative sign with the magnitude.
Answer:
First, let's calculate the potential energy stored in the spring:
PE = (1/2)kx²
where k is the spring constant and x is the distance the spring is compressed. Plugging in the given values, we get:
PE = (1/2)(600.0 N/m)(7.5 m)² = 16875 J
This potential energy is converted into kinetic energy as the roller coaster moves along the track. At the horizontal section, all of the potential energy has been converted into kinetic energy:
KE = (1/2)mv²
where m is the mass of the roller coaster and v is its velocity. Plugging in the given values, we get:
16875 J = (1/2)(205.0 kg)(6.0 m/s)²
Simplifying and solving for the vertical displacement, we get:
Δy = (KE/mg) - 7.5 m
where g is the acceleration due to gravity. Plugging in the values, we get:
Δy = [(1/2)(205.0 kg)(6.0 m/s)²/(205.0 kg)(9.81 m/s²)] - 7.5 m
Δy = 8.47 m
Therefore, the roller coaster is 8.47 meters above the starting level at the second (flat) level.
Explanation:
4. A rocket has landed on Planet X, which has half the radius of Earth. An astronaut onboard the rocket weighs twice as much on Planet X as on Earth. If the escape velocity for the rocket taking off from Earth is v0, then its escape velocity on Planet X is
(A) 2v0
(B) sqrt(2)v0
(C) v0
(D) v0/2
(E) v0/4
The escape velocity for the rocket taking off from Earth is v0, then its escape velocity on Planet X is (A) 2v0.
The surface gravity of a planet is given by:
g = [tex]GM/R^2,[/tex]
where G is the gravitational constant, M is the mass of the planet, and R is the radius of the planet.
Let's assume that the mass of the astronaut is m. On Earth, the weight of the astronaut is given by:
mg = [tex]GMearth/Rearth^2,[/tex]
where Mearth and Rearth are the mass and radius of the Earth, respectively.
On Planet X, the weight of the astronaut is given by:
mgx =
Since the astronaut weighs twice as much on Planet X as on Earth, we have:
mgx = 2mg.
Combining these equations, we get:
[tex]GMx/Rx^2 = 2GMearth/Rearth^2.[/tex]
Since Planet X has half the radius of Earth, we have:
Rx = Rearth/2.
Substituting this into the above equation, we get:
GMx/[tex](Rearth/4)^2[/tex] = 2GMearth/[tex]Rearth^2,[/tex]
or
GMx = 8GMearth.
The escape velocity of a planet is given by:
v_escape = sqrt(2GM/R),
where R is the radius of the planet.
On Earth, the escape velocity is:
v_escape,earth = sqrt(2GMearth/Rearth).
On Planet X, the escape velocity is:
v_escape,x = sqrt(2GMx/Rx).
Substituting the expressions for GMx and Rx, we get:
v_escape,x = sqrt(2(8GMearth)/(Rearth/2)),
or
v_escape,x = sqrt(32) * sqrt(GMearth/Rearth).
Since sqrt(32) is approximately equal to 5.66, we have:
v_escape,x = 5.66 * v_escape,earth.
Learn more about gravitational constant here:
https://brainly.com/question/858421
#SPJ1
2. A mechanic has two spanners, one 15 cm long and the second 20 cm long. He applies a force of 30 N with the first spanner, and 20 N with the second. The forces are perpendicular to the spanner. a) With which spanner does he produce the greatest torque?
For the second spanner, the torque is: Torque = 20 N x 10 cm = 200 N.cm Therefore, the first spanner produces the greatest torque.
How is spanner tension determined?The torque applied to the fastener rises as the lever arm extends when a torque wrench with an extension (such as a crow foot or a dog bone) is used. The calculator will determine what setting you need to make on the wrench to attain the necessary fastener torque. M1 = M2 x L1 / L2 has been used as the solution.
We must apply the algorithm to determine the torque generated by each spanner:
Force x perpendicular separation from the centre point equals torque.
Assuming that each spanner's pivot point is in its center, the perpendicular distance from the pivot to the spot at which the force is applied is equal to half of the spanner's length.
For the first spanner, the torque is:
Torque = 30 N x 7.5 cm = 225 N.cm
For the second spanner, the torque is:
Torque = 20 N x 10 cm = 200 N.cm
Therefore, the first spanner produces the greatest torque.
To know more about torque visit:-
https://brainly.com/question/29024338
#SPJ1
The surface of S that is the boundary of solid between Z=0 and Z=X²
The total surface area of S that is the boundary of solid between Z=0 and Z=X² is given as :
∬S dS = ∫0^2π ∫0^1 tanθ √(1 + cos²θ) dr dθ + ∫0^1 ∫0^2π √(z) / cosθ dθ dz
How do we calculate?Applying the surface integral formula:
∬S dS
where S = surface of the solid,
dS = surface area element.
We can use the cylindrical coordinates to parameterize the surface S (r, θ, z).
The surface S consists of two parts:
the top surface and the curved surface.For the top surface,
z = X² = r²cos²θ, so r = sinθ/cosθ = tanθ.
The surface element is given by dS = r dθ dr = tanθ dr dθ.
For the curved surface,
z = X² = r²cos²θ, so r = √(z/cos²θ).
The surface element is dS = r dθ dz = √(z) / cosθ dθ dz.
In conclusion, the total surface area of S is:
∬S dS = ∫0^2π ∫0^1 tanθ √(1 + cos²θ) dr dθ + ∫0^1 ∫0^2π √(z) / cosθ dθ dz
Learn more about surface integral formula at:
https://brainly.com/question/28171028
#SPJ1
QUESTION 16. Suppose you have a garden hose of diameter 2 cm and you use it to fill a 25 liters bucket/container. Suppose it takes you 1 minute to do that. Your answer (a) Calculate the speed at which the water enters the bucket. (b) Suppose the open end of the hose is then squeezed to a diameter of 5mm. What is speed at which water comes out of the hose?
Answer:
I mean 25 kg of course.
Explanation:
If you filled the bucket it is 25 liters. The density of water is about 1 kg/liter so about 1 kg
What is the difference between a beta particle and an electron
Answer:
the beta particle has the same mass and charge as electron.it differs from the electron in its origin
low-velocity steam (with negligible kinetic energy) enters an adiabatic nozzle at 580 k and 3 mpa. the steam leaves the nozzle at 2 mpa with a velocity of 400 m/s. the mass flow rate is 0.4 kg/s. determine the temperature (k) of the steam leaving the nozzle and the exit area of the nozzle in mm2 .
The temperature of the steam leaving the nozzle is 674.5 K, and the exit area of the nozzle is = 704.2 / 2² mm2.
let's use the conservation of mass to find the exit-specific volume of the steam:
ℎ1 = 3297.6 kJ/kg (from steam tables at 580 K and 3 MPa)
ℎ2 = ℎ1 - 1/2
how much force does she hit the ball with ?
The amount of force on the ball of mass 0.045 kg is 202.5 N.
What is force?Force is the product of mass and acceleration.
To calculate the force she hit the ball with, we use the formula:
Formula:
F = m(v-u)/t....................... Equation 1Where:
F = Force on the ballm = Mass of the ballv = Final velocity of the ballu = Initial velocity of the ballt = TimeFrom the question,
Given:
m = 0.045 kgv = 27 m/su = 0 m/st = 0.006 secondsSubstitute these values into equation 1
F = 0.045(27-0)/0.006F = 202.5 NHence, the force on the ball is 202.5 N.
Learn more about force here: https://brainly.com/question/25573309
#SPJ1
write any one method to increase magnetic strength of magnet
Can somebody please answer both of my questions? This one and the one under my profile.
Image to question is attached.
Please don't just comment for the points. I need actual help.
The coefficient of friction is 1.39.
Describe Potential Energy?Potential energy is a form of energy that an object possesses due to its position or configuration. It is the energy that is stored in an object as a result of its position or shape, and is potentially available to do work when released. The amount of potential energy an object has depends on its mass, height, and its distance from a reference point where the potential energy is considered to be zero. The most common example of potential energy is gravitational potential energy, which is the energy an object has due to its position above the ground. Other examples of potential energy include elastic potential energy, chemical potential energy, and nuclear potential energy. Potential energy can be converted into other forms of energy, such as kinetic energy or thermal energy, through various processes such as falling, stretching, or chemical reactions.
First, let's find the spring potential energy when it is compressed by 10.0 cm:
U_spring = (1/2)kx² = (1/2)(25.0 N/m)(0.1 m)² = 0.125 J
When the object is released, all of this potential energy is converted to kinetic energy:
K = U_spring = 0.125 J
The initial velocity of the object can be found using the conservation of energy:
K = (1/2)mv²
v = √(2K/m) = √(2(0.125 J)/(0.0200 kg)) = 2.50 m/s
Since the object slides a distance of 1.15 m, the average frictional force acting on it is:
F_friction = (1/2)mv²/d1 = (1/2)(0.0200 kg)(2.50 m/s)²/1.15 m = 0.272 N
The gravitational potential energy of the object when it is at a height h = 1.00 m above the floor is:
U_gravity = mgh = (0.0200 kg)(9.81 m/s²)(1.00 m) = 0.196 J
When the object falls to the floor, this potential energy is converted to kinetic energy:
K = U_gravity = 0.196 J
The final velocity of the object just before it hits the floor can be found using the conservation of energy:
K = (1/2)mv²
v = √(2K/m) = √(2(0.196 J)/(0.0200 kg)) = 3.14 m/s
The horizontal distance the object travels while falling can be found using the time it takes to fall:
t = √(2h/g) = √(2(1.00 m)/(9.81 m/s²)) = 0.452 s
d_fall = v*t = (3.14 m/s)(0.452 s) = 1.42 m
The total horizontal distance the object travels is:
d_total = d1 + d_fall = 1.15 m + 1.42 m = 2.57 m
The coefficient of friction can be found using the relationship:
F_friction = μN
where N is the normal force acting on the object. Since the object is not accelerating vertically, we know that:
N = mg
The normal force is also equal in magnitude to the force that the tabletop exerts on the object perpendicular to the surface:
N = F_tabletop
Therefore, the coefficient of friction is:
μ = F_friction/F_tabletop = F_friction/mg = (0.272 N)/(0.0200 kg)(9.81 m/s²) = 1.39
To know more about magnitude visit:
https://brainly.com/question/9804443
#SPJ1
In earlier days, horses pulled barges down canals in the manner shown in the figure. Suppose the horse pulls on the rope with a force of
7920 N at an angle of 8 - 15.0° to the direction of the motion of the barge, which is headed straight along the positive direction of an x
axis. The mass of the barge is 9510 kg, and the magnitude of its acceleration is 0.120 m/s². What is the magnitude of the force on the
barge from the water? (Note to Student: Don't include the forces perpendicular to the surface of the water in the solution to this
problem, namely the gravitational and buoyant forces.)
The magnitude of the force on the barge from the water is approximately 18497 N.
What is Mass?Mass is a measure of the amount of matter in an object. It is a scalar quantity that is usually measured in units of kilograms (kg) or grams (g). Mass is different from weight, which is the force that gravity exerts on an object with mass.
Here, F(horse) is the force applied by the horse, F(water) is the force on the barge from the water, and the x and y axes are chosen such that the motion is along the x-axis and the force from the water is along the y-axis.
[tex]$\rm \Sigma F_x = F_{horse,x} = F_{water}$[/tex]
And substituting the x and y components of the forces, we get:
[tex]$ \rm F_{horse}\cos(8^{\circ}) = m a\sin(15^{\circ})$[/tex]
Solving for [tex]$ \rm F_{water}$[/tex], we get:
[tex]$ \rm F_{water} = \dfrac{F_{horse}\cos(8^{\circ})}{\sin(15^{\circ})}$[/tex]
Substituting the given values, we get:
[tex]$\rm F_{water} = \dfrac{7920 N \cdot \cos(8\°)}{\sin(15\°)} \approx 18497 N$[/tex]
Learn more about Mass from the given link
brainly.com/question/86444
#SPJ1
Directions:
For your assignment this week, you get to develop your own game.
Provide the following information about your game:
Name (2 pts)
Game play and game objectives in detail (8 pts)
Scoring of the game
Equipment needed (2 pts)
Number of players per team (2 pts)
At least two specific skills needed for the game (i.e., catching, throwing, kicking, etc.) (2 pts)
At least two offensive strategies (4 pts)
You can type the information about your game in the space provided here. Note: When you have finished creating your game, try to teach it to someone else so you can play!
Name: Bubble Blitz
What is this gameplay, equipment used and scoring, etc?Goals and Playthrough: Bubble Blitz is a fast-paced game in which players race against time to pop as many bubbles as possible. The game's objective is to pop as many bubbles as possible to score as many points as possible.
Scoring: One point is awarded for popping each bubble. The player with the highest score wins the game at the end.
Required equipment: A large open area and either a bubble machine or a container filled with soapy water are required for Bubble Blitz.
The number of team members: You can play Bubble Blitz by yourself or in teams of two or more.
Abilities required: To pop the bubbles as they appear in Bubble Blitz, players must have strong hand-eye coordination and quick reflexes.
To know more about Hand-eye Coordination, visit:
https://brainly.com/question/12473969
#SPJ1
Calculate the binding energy for IRON-56.
Answer:
With 8.8 MeV binding energy per nucleon, iron-56 is one of the most tightly bound nuclei.
Pls mark brainliest
Maricella is holding an ice cube outside and her hand is transferring thermal energy to the ice. Which method of heat transfer is this an example of?
Group of answer choices
Convection
Melting
Radiation
Conduction
This is an example of conduction, which is the transfer of heat energy between two objects that are in contact with each other.
What is the difference between thermal energy and temperature?Thermal energy is the sum of the kinetic energies of all the particles in a substance, whereas temperature is the average kinetic energy of those particles.Temperature is a scalar quantity, measured in degrees Celsius or Fahrenheit, while thermal energy is a scalar quantity, measured in joules.
How does thermal conductivity affect the rate of heat transfer by conduction?Thermal conductivity is a measure of how well a material conducts heat energy. Materials with a high thermal conductivity will transfer heat energy more quickly by conduction than materials with a low thermal conductivity. This means that the rate of heat transfer by conduction is directly proportional to the thermal conductivity of the material.
To know more about energy,visit:
https://brainly.com/question/1932868
#SPJ1
What type of system is represented by the image below?
Group of answer choices
Open system
Isolated system
Closed system
semi-open system
Answer:
open system
Explanation:
open system freely exchange and matter with the surrounding