Answer:
Approximately [tex]73.6\; {\rm m\cdot s^{-1}}[/tex].
([tex]v = (1/2)\, g\, t[/tex], assuming that [tex]g = 9.81\; {\rm m\cdot s^{-2}}[/tex].)
Explanation:
Assume that the air resistance on the ball is negligible. Let [tex]v[/tex] denote the initial velocity of the ball.
The kinetic energy of the ball will be conserved. Hence, when the ball returns to the starting position, the ball will be travelling at the same speed but in the opposite direction (downwards.) The velocity will become [tex](-v)[/tex].
The change in the velocity of the ball would be [tex]\Delta v = ((-v) - v) = (-2\, v)[/tex].
Change in velocity is also equal to [tex]a\, t[/tex], where [tex]a[/tex] is acceleration and [tex]t[/tex] is the time required to achieve such change. Under the assumptions, acceleration of the ball will be constantly [tex]a = (-g)[/tex]. Hence:
[tex]\Delta v = a\, t = (-g)\, t[/tex].
Since [tex]\Delta v = ((-v) - v) = (-2\, v)[/tex]:
[tex](-2\, v) = \Delta v = (-g)\, t[/tex].
[tex]\begin{aligned}v &= \frac{(-g)\, t}{(-2)} = \frac{g\, t}{2}\end{aligned}[/tex].
Substitute in [tex]g = 9.81\; {\rm m\cdot s^{-2}}[/tex] and [tex]t = 15.0\; {\rm s}[/tex] to obtain:
[tex]\begin{aligned}v &= \frac{g\, t}{2} \\ &= \frac{(9.81)\, (15.0)}{2}\; {\rm m\cdot s^{-1}} \\ &\approx 73.6\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].
iron and gold wires of equal length are found to have the same resistance. what is the ratio of their radii?
Now you have the formula for the ratio of the radii of gold and iron wires with equal resistance.
To find the ratio of the radii of iron and gold wires with equal resistance, we'll use the formula for resistance in terms of resistivity, length, and cross-sectional area.
1. Write down the formula for resistance:
R = ρ * (L/A), where R is resistance,
ρ is resistivity,
L is length, and
A is the cross-sectional area of the wire.
2. Recall that the cross-sectional area A of a wire is given by A = π *[tex]r^2[/tex],
where r is the radius of the wire.
3. Replace A in the resistance formula with the area formula:
R = ρ * (L/(π * [tex]r^2)[/tex])
4. Set up an equation for both iron and gold wires with equal resistance:
ρ_Iron * (L_Iron/(π * r_I[tex]ron^2[/tex])) = ρ_Gold * (L_Gold/(π * r_[tex]Gold^2)[/tex])
5. Since the lengths of the wires are equal, L_Iron = L_Gold.
Also, cancel out π on both sides:
ρ_Iron * (L/(r_[tex]Iron^2)[/tex]) = ρ_Gold * (L/(r_[tex]Gold^2)[/tex])
6. Solve for the ratio of the radii squared:
(ρ_Iron/ρ_Gold) = (r_[tex]Gold^2/r[/tex]_[tex]Iron^2[/tex])
7. Find the square root of both sides to get the ratio of the radii:
√(ρ_Iron/ρ_Gold) = r_Gold/r_Iron
To find the actual ratio, look up the resistivities of iron and gold, and plug the values into the formula.
For similar question on resistance.
https://brainly.com/question/24858512
#SPJ11
A uniform wire with mass M and length L is bent into a semicircle. Find the magnitude of the gravitational force this wire exerts on a point with mass m placed at the center of curvature of the semicircle.
The magnitude of the gravitational force exerted by the wire on the point mass m is: |F| = 2G(M*m/L^2)
To solve this problem, we need to first find the gravitational force exerted by each small segment of the wire on the point mass m, and then integrate the force over the entire semicircle.
Let's consider a small segment of the wire of length dl, located at a distance r from the center of curvature of the semicircle. The mass of this segment can be written as dm = M(dl/L), since the wire is uniform. The gravitational force exerted by this segment on the point mass m is given by:
dF = G*(dm*m)/(r^2)
where G is the gravitational constant.
Substituting dm, we get:
dF = G*(Mm/L)(dl/r^2)
Now we need to integrate this expression over the entire semicircle. Since the wire is bent into a semicircle, the distance r from the center of curvature varies from 0 to L/2. Thus, the total gravitational force exerted by the wire on the point mass m is:
F = integral of dF from r=0 to r=L/2
= G*(Mm/L) * integral of (dl/r^2) from r=0 to r=L/2
= G(Mm/L) * (1/0 - 1/(L/2)^2)
= 2G*(M*m/L^2)
For more such questions on gravitational force, click on:
https://brainly.com/question/24783651
#SPJ11
Let V(z) be the potential of a ring of charge on the axis of symmetry at distance z
from the center. (See Exercise 21. ) Obtain the first two nonvanishing terms in V(z)
for z » the radius of the ring. To which multipoles do they correspond? Can you
see by symmetry that the dipole moment is O?
The first two nonvanishing terms in V(z) for z » the radius of the ring are V(z) = Q/4πε0z + Qa2/4πε0z3. They correspond to the monopole and quadrupole moments, respectively.
he potential V(z) due to a ring of charge on the axis of symmetry can be expanded in a power series in z. The first two nonvanishing terms in this series are obtained by taking the limit z » the radius of the ring, which gives V(z) ≈ Q/4πε0z + Qa2/4πε0z3, where Q is the total charge on the ring and a is the radius of the ring.
The first term corresponds to the monopole moment, which represents the total charge of the ring. The second term corresponds to the quadrupole moment, which represents the deviation of the charge distribution from spherical symmetry. By symmetry, the dipole moment must be zero, since the charge distribution is symmetric about the axis of the ring.
To know more about dipole moment, here
brainly.com/question/28297887
#SPJ4
A tennis ball is dropped from 1.0 m, bounces off the ground, and rises to 0.85 m.What kind of collision occurred between the ball and the ground?elastic collisioninelastic collisionperfectly elastic collisionperfectly inelastic collision
The collision between the tennis ball and the ground is an inelastic collision, as some energy was lost during the collision, indicating that it was not perfectly elastic.
The collision between the tennis ball and the ground is an example of an inelastic collision. During the collision, some energy is lost due to the deformation of the ball and the ground. This loss of energy is evidenced by the fact that the ball does not rebound to the same height from which it was dropped. In an elastic collision, the kinetic energy of the system is conserved, but in an inelastic collision, it is not. Inelastic collisions are characterized by permanent deformation of the objects involved, as energy is transformed into other forms such as heat and sound.
Therefore, based on the information given, we can conclude that the tennis ball and the ground experienced an inelastic collision when the ball was dropped from a height of 1.0 m, bounced off the ground, and rose to a height of 0.85 m.
learn more about inelastic collision here:
https://brainly.com/question/24616147
#SPJ4
one star has a temperature of 10,000 k and another star has a temperature of 5,000 k. how would you describe the difference in energy between the two stars?
The difference in energy between the two stars with temperatures 10,000 K and 5,000 K is that the star with a temperature of 10,000 K has more energy than the star with a temperature of 5,000 K.
The degree or intensity of heat present in a substance or object, particularly expressed in degrees Celsius or Fahrenheit or as an equivalent in another scale is called temperature.Energy is the ability of a system or object to perform work on another object or system.Temperature is a measure of the amount of energy contained in a system or substance. The amount of energy in a substance or system is directly proportional to its temperature. Therefore, a substance with a higher temperature contains more energy than a substance with a lower temperature.
More on star temperature: https://brainly.com/question/28458370
#SPJ11
what is the resistance, tolerance, and numerical uncertainty of a resistor with color bands violet-yellow-brown-gold?
The resistance of a resistor with color bands violet-yellow-brown-gold is 740 Ω +/- 5%, and its tolerance is 5%. The numerical uncertainty of the resistor is 37 Ω.
Resistance: The violet-yellow-brown-gold-colored resistor's resistance value can be determined by reading the colors in the order they are printed. The value is determined as follows:
violet indicates 7, yellow indicates 4, brown indicates 1, and gold indicates a multiplier of 0.1.
Therefore, the resistance of this resistor is calculated as follows:
7 4 × 101 = 740 ohms.
Tolerance: The resistor's tolerance, which indicates the percentage variation in the resistance of the resistor from its nominal or theoretical value, is indicated by a fourth color band. The resistor's nominal resistance is calculated as follows:
740 ohms, with a tolerance of ±5%.
As a result, the tolerance is indicated by a gold-colored band.
Numerical Uncertainty: The numerical uncertainty of a resistor is calculated using the following equation:
Numeric uncertainty = (Tolerance/100) × Resistance
Numeric uncertainty = (5/100) × 740 = 37 ohms
Therefore, the numerical uncertainty of a resistor with color bands violet-yellow-brown-gold is 37 ohms.
In summary,
Resistance = 740 ohms
Tolerance = ±5%
Numerical uncertainty = 37 ohms
Know more about resistor here:
https://brainly.com/question/24858512
#SPJ11
Okay so I answered the first few questions but can someone pleaseeee answer the last one? PLEASEEE <3
Describe the roles of light, carbon dioxide, and water in photosynthesis.
Photosynthesis uses sunlight, carbon dioxide and water to make glucose and oxygen. It then uses this glucose to run the cellular process. But all the energy originally came from the sun.
Explain the process of cellular respiration. What organisms undergo cellular respiration?
Cellular respiration begins in a cells cytoplasm where the glucose breaks down. The rest of the process happens in the mitochondria. More surface area in the mitochondria means it can convert glucose to ATP more better. It then releases carbon dioxide, energy, and water from the mitochondria.
Describe the similarities and differences between aerobic respiration, and anaerobic respiration.
The aerobic version uses oxygen while the anaerobic version does not. A similarity is that they both create energy.
In a food chain, a rabbit eats grass, and the grass gets its energy from the sun. Describe the cycling of carbon and energy that occurs in this food chain.
The energy flows from the sun to the grass, and then to the rabbit, while the carbon cycles between the atmosphere, the grass, and the rabbit.
What is Food Chain?
A food chain is a linear sequence of organisms, starting from producers and ending with top predators, that shows the transfer of energy and nutrients between different organisms in an ecosystem. The food chain illustrates how energy flows from one organism to another as they consume and are consumed by each other. The producers, such as plants, convert the energy from the sun into chemical energy through photosynthesis.
In this food chain, the sun provides energy to the grass through the process of photosynthesis. The grass then stores this energy in the form of carbohydrates, which the rabbit consumes as food. During cellular respiration in the rabbit's cells, the carbohydrates are broken down into carbon dioxide and water, releasing energy in the form of ATP. The carbon dioxide is then released back into the atmosphere through respiration or excretion, where it can be taken up by plants during photosynthesis, completing the carbon cycle.
Learn more about Food Chain from the given link
https://brainly.com/question/16504883
#SPJ1
two sirens are attached to a vertical metal plate. they both have the same frequency and they are in phase. the sirens are separated by a distance of 4.00 m. they generate sound with a frequency of 514 hz. a fire fighter is standing away from the sirens, in front of one of the sirens. what is the closest distance from the metal plate the fire fighter can stand and hear destructive interference?
Answer:
When two sound waves with the same frequency and amplitude interfere, they can either add up constructively, resulting in a louder sound, or cancel each other out destructively, resulting in no sound at all. Destructive interference occurs when the waves are out of phase by half a wavelength, which means that the distance between the two sources is equal to an odd multiple of half the wavelength.
In this case, the distance between the two sirens is 4.00 m, which is equal to one wavelength (λ) plus half a wavelength (λ/2) of the sound waves they emit. Therefore, the wavelength of the sound waves is λ = 4.00 m / 1.5 = 2.67 m.
To find the distance from the metal plate where the fire fighter can stand and hear destructive interference, we need to calculate the distance from the plate to the fire fighter that is equal to an odd multiple of half the wavelength. Let's call this distance "x".
If the fire fighter is standing in front of one siren, the distance from the plate to the fire fighter is:
d1 = x
If the fire fighter moves towards the plate by a distance of half the wavelength, the distance from the plate to the fire fighter becomes:
d2 = x - λ/2
The difference between these two distances must be an odd multiple of half the wavelength for destructive interference to occur:
d2 - d1 = -λ/2 = -(2.67 m / 2) = -1.335 m
Therefore, the fire fighter can stand at a distance of x = 1.335 m away from the metal plate and hear destructive interference.
how does the terminal velocity depend on the drag force? is the relationship linear or nonlinear? explain your responses.
The terminal velocity depends directly on the drag force and the relationship between them is nonlinear.
The terminal velocity is the maximum velocity that a falling object can reach when the drag force of the surrounding fluid is equal to the gravitational force acting on the object. The drag force is dependent on the velocity of the object, and as the velocity increases, the drag force also increases.
However, the relationship between the drag force and velocity is nonlinear because the drag force is proportional to the square of the velocity. This means that as the velocity of the object increases, the drag force increases more rapidly. Therefore, the terminal velocity, which is the point at which the drag force balances the gravitational force, is reached when the nonlinear relationship between the drag force and velocity is balanced by the gravitational force.
To know more about velocity, here
brainly.com/question/14304469
#SPJ4
PLEASE HELP ME OUT!!!!!!!
One solution to the depletion of mineral and energy resources is to increase resource efficiency and conservation.
What is a solution to the depletion of mineral and energy resources?Resource efficiency and conservation can be done by reducing waste and improving the efficiency of resource use in manufacturing, transportation, and consumption.
This can be achieved through measures such as recycling, using renewable energy sources, and developing more efficient technologies.
Overall, addressing the depletion of mineral and energy resources will require a combination of technological innovations, sustainable practices, and responsible policies that prioritize the long-term health of our planet and its resources.
Learn more about mineral resources:https://brainly.com/question/7830725
#SPJ1
3. a frictionless pulley has the shape of a uniform solid disk of mass 2.5 kg and radius 20.0 cm. a 1.5-kg stone is attached to a massless wire that is wrapped around the rim of the pulley, as shown. the system is then released from rest. as always, show details of your calculation. a. how far (in m)must the stone fall so that the pulley has 4.5 j of kinetic energy? b. what percent of the total kinetic energy of the system does the pulley have at that point?
a. To calculate the distance the stone must fall, we need to use the formula KE = ½ mv², where m is the mass of the object and v is the velocity of the object. First, calculate the total kinetic energy of the system:
[tex]KEtotal = ½ mPulley x v² + ½ mStone x v² = ½ (2.5 kg)(4.5 J) + ½ (1.5 kg)(4.5 J) = 6.75 J[/tex]
We then rearrange the equation to solve for v²: v² = 2 x KE / m = (2 x 6.75 J) / (1.5 kg) = 9 J/kg.Next, we need to calculate the velocity of the stone, vStone, which is equal to the square root of the above equation: vStone = √(9 J/kg) = 3 m/s
Finally, we need to use the equation s = vt, where s is the distance the stone falls, v is the velocity of the stone, and t is the time it takes for the stone to fall. We rearrange the equation to solve for t: t = s / v = 4.5 m / 3 m/s = 1.5 s Therefore, the stone must fall a distance of 4.5 m in order for the pulley to have 4.5 J of kinetic energy.
b. To calculate the percent of the total kinetic energy of the system that the pulley has, we need to use the equation: Percent of total KE = KEpulley/KEtotal x 100%. KEpulley = ½ mPulley x v² = ½ (2.5 kg)(4.5 J) = 4.5 J
Therefore, the percent of the total kinetic energy that the pulley has is 4.5 J/6.75 J x 100% = 66.67%.
To learn more about kinetic energy here:
https://brainly.com/question/26472013
#SPJ11
A rubber ball dropped from a height of 50
m
rebounds at every impact from the floor to a height half of that from which it has fallen. Find the total distance described by the time it comes to rest.
The total distance described by the rubber ball before it comes to rest is 100 meters.
At the first drop, the ball falls from a height of 50 meters, and then rebounds to a height of 25 meters. So, the distance covered in the first drop and rebound is 50 + 25 = 75 meters.
At the second drop, the ball falls from a height of 25 meters and rebounds to a height of 12.5 meters. So, the distance covered in the second drop and rebound is 25 + 12.5 = 37.5 meters.
At the third drop, the ball falls from a height of 12.5 meters and rebounds to a height of 6.25 meters. So, the distance covered in the third drop and rebound is 12.5 + 6.25 = 18.75 meters.
This process repeats until the height of the rebound is less than 0.01 meters, at which point we consider the ball to have come to rest.
The total distance covered by the ball is the sum of all the distances covered during each drop and rebound, which is:
75 + 37.5 + 18.75 + 9.375 + 4.6875 + 2.34375 + ...
This is a geometric series with first term 75 and common ratio 1/2. Using the formula for the sum of an infinite geometric series, we get:
total distance = 75 / (1 - 1/2) = 100 meters.
For more questions like Distance click the link below:
https://brainly.com/question/28033813
#SPJ11
an empty bottle has a mass of 15g when full of alcohol of density 0.8g/cm3 it's mass is 47g . Calculate? 1) the volume of the bottle (2) it's mass when full of water (3) it's mass when full of mercury of density 13.6g/cm3
To calculate the volume of the bottle, we can use the fact that the difference in mass when the bottle is empty and full of alcohol is equal to the mass of the alcohol it contains. So:
Mass of alcohol = 47 g - 15 g = 32 g
We know that the density of alcohol is 0.8 g/cm³, so:
Density = Mass / Volume
0.8 g/cm³ = 32 g / V
Solving for V, we get:
V = 32 g / 0.8 g/cm³ = 40 cm³
To find the mass of the bottle when full of water, we need to know the volume of water that the bottle can hold. Since we know the volume of the bottle, we can directly calculate the mass of the water using its density (which is 1 g/cm³):Volume of water = 40 cm³
Mass of water = Density x Volume
Mass of water = 1 g/cm³ x 40 cm³ = 40 g
To find the mass of the bottle when full of mercury, we can use the same approach as above, but this time using the density of mercury (which is 13.6 g/cm³):Volume of mercury = 40 cm³
Mass of mercury = Density x Volume
Mass of mercury = 13.6 g/cm³ x 40 cm³ = 544 g
More on density can be found here: https://brainly.com/question/15164682
#SPJ1
a 2.0-kg mass is projected vertically upward from ground level with an initial speed of 35 m/s. the mass rises to a maximum height of 50 m above ground level. what is the change in mechanical energy of the mass caused by air resistance between the point of projection and the point of maximum height?
Between the point of projection and the point of maximum height, the mass's mechanical energy due to air resistance changes by -245 J.
What is the physics equation for vertical height?The equation y = h + V y t g t 2 / 2 y=h+Vytgt2/2 describes the vertical distance from the ground, where g represents the acceleration of gravity.
The work-energy concept may be used to compute the modification in mechanical energy of the mass brought on by air resistance:
ΔE = W_net
At the point of projection, the mechanical energy of the mass is:
E_i = 1/2 * m * v_i²
where m is the mass of the object, and v_i is the initial velocity.
E_i = 1/2 * 2.0 kg * (35 m/s)² = 1225 J
At the maximum height, the mass has zero velocity, so its mechanical energy is entirely potential energy:
E_f = m * g * h
E_f = 2.0 kg * 9.8 m/s² * 50 m = 980 J
The net work done on the mass is equal to the difference between its initial and final mechanical energies:
W_net = E_f - E_i
= 980 J - 1225 J
= -245 J
To know more about mechanical energy visit:-
https://brainly.com/question/29408366
#SPJ1
you are designing a velocity selector for a mass spectrometer. you want the charged particles entering the spectrometer to be traveling at 3500 m/s northward. you have a set of parallel plates that will create a 2100 n/c electric field downward. how strong and in what direction should the magnetic field be inside the velocity selector?
The required magnitude of magnetic field is 0.6 T and the direction of magnetic field is in positive x-direction.
The expression for velocity, electric field and magnetic field when electric and magnetic fields are perpendicular to each other is,
v = E/B
where,
v is velocity
E is magnitude of electric field
B is magnitude of magnetic field
To find out the magnitude of magnetic field, let us make it as subject,
B = E/v = 2100/3500 = 0.6 T
The direction of velocity is given northwards. The direction of electric field is downwards. So, the direction of magnetic field is in positive x direction.
This is because, Electric field E, magnetic field B and velocity v are all perpendicular to one another.
To know more about magnetic field:
https://brainly.com/question/15730394
#SPJ4
A car of mass 1100kg moves at 24 m/s. What is the braking force needed to bring the car to a halt in 2. 0 seconds? N
The braking force needed to bring the car to a halt in 2.0 seconds, given that the car has amass of 1100 Kg and was moving at 24 m/s is -13200 N
How do i determine the braking force needed?We'll begin our calculation by obtaining the deceleration of the car. This is shown below:
Initial velocity (u) = 24 m/sFinal velocity (v) = 0 m/sTime (t) = 2 secondsDeceleration of car (a) =?a = (v - u) / t
a = (0 - 24) / 2
a = -24 / 2
a = -12 m/s²
Haven obtained the deceleration, we shall determine the breaking force needed to halt the car. Details below:
Mass (m) = 1100 KgDeceleration (a) = -12 m/s²Breaking force (F) =?Force = mass × deceleration
Breaking force = 1100 × -12
Breaking force = -13200 N
Thus, the breaking force needed to stop the car is -13200 N
Learn more about force:
https://brainly.com/question/12163222
#SPJ1
ASAP................Research the use in the military of magnetic anomaly detectors, MADs. Write a brief 300-word essay answer the following questions on MADs. What is the main idea behind MADs? What can be detected by using MADs? A brief history of the MAD development.
Answer:
ASAP................Research the use in the military of magnetic anomaly detectors, MADs. Write a brief 300-word essay answer the following questions on MADs. What is the main idea behind MADs? What can be detected by using MADs? A brief history of the MAD development.
Explanation:
why do we think triton is a captured moon> how might its capture be rlevant to its geological activity?
Triton is a captured moon because of its highly inclined and retrograde orbit. Its capture might be relevant to its geological activity because it would have caused to undergo significant changes, which include the formation of cryovolcanoes, its internal structure.
Triton is a moon of Neptune that is thought to be a captured moon. The orbit of Triton is unlike any other moon in our solar system, as it is not in the equatorial plane of Neptune and is tilted at an angle of 23.5 degrees. Triton is thought to have been captured from the Kuiper Belt, a region of the solar system that lies beyond Neptune, and its capture was most likely caused by a collision between Neptune and a large Kuiper Belt object. The capture of Triton could be relevant to its geological activity as it may have caused the moon to heat up internally, leading to the formation of a subsurface ocean and cryovolcanism.
The capture of Triton could have caused it to heat up internally, which may have led to the formation of a subsurface ocean. This is because the capture of Triton would have involved a transfer of energy from Neptune to the moon, which would have caused it to heat up. The transfer of energy would have occurred due to tidal forces, which are caused by the gravitational attraction between Neptune and Triton. As Triton was captured, it would have been subjected to strong tidal forces that would have caused it to heat up, leading to the formation of a subsurface ocean.
Cryovolcanism is another geological activity that is associated with the capture of Triton. Cryovolcanism is the eruption of volatiles such as water, ammonia, and methane instead of lava. Triton is thought to have cryovolcanoes, which are similar to volcanoes on Earth, but instead of lava, they erupt water and other volatiles. The capture of Triton would have caused it to undergo significant changes, which would have included the formation of cryovolcanoes.
The capture of Triton could also have caused it to become a geologically active moon. This is because the capture of Triton would have caused it to undergo significant changes, which would have included the formation of cryovolcanoes. The geological activity of Triton may also be related to its internal structure, which is thought to be differentiated, meaning that it has a core, mantle, and crust.
The differentiation of Triton may have also played a role in its geological activity, as it may have caused the moon to be more geologically active than it would have been otherwise.
For more such questions on Triton.
https://brainly.com/question/16400576#
#SPJ11
a primary concern about reference frames is to identify their relation to each other. for example, some problems you have worked in class identify that events are simultaneous in one frame, and then prompt you to discuss or measure the difference in time between those events in a reference frame moving relative to the other at a speed that approaches the speed of light. if the second reference frame is considered, and two events are defined to be simultaneous in that frame, are the events simultaneous in the other? in other words, are these effects symmetric between frames?
The answer is no, the effects of reference frames are not symmetrical. This is due to the theory of relativity.
According to Einstein’s special theory of relativity, the simultaneity of two events can be different in different reference frames. This means that events that appear to be simultaneous in one frame may not be so in another. The difference between the reference frames is caused by the varying relative speeds between them, and this difference leads to an asymmetry in the effects of the frames.
Einstein introduced the theory of special relativity, which says that time is not absolute but relative to the observer's state of motion. Einstein demonstrated that time is affected by speed and gravity. He showed that when an object moves at a high speed, time slows down, which is known as time dilation. Time dilation only happens at extremely high speeds or in the presence of massive gravitational fields, which causes it to become significant.
For example, if one frame is moving at a very high speed relative to another, then events that are simultaneous in the first frame may appear to be not simultaneous in the second frame, and vice versa. This asymmetry is a key concept in special relativity and is one of the primary concerns of reference frames.
Therefore, the answer to the question is that the effects are not symmetric between frames.
To know more about the theory of relativity, refer here:
https://brainly.com/question/28289663#
#SPJ11
A 4.80-Kg watermelon is dropped from rest from the roof of a 25.0-m-tall building and feels no appreciable air resistance. (a) calculate the work done by gravity on the watermelon during its displacement from the roof to the ground. (b) just before it strikes the ground, what is the watermelon's (i) kinetic energy and (ii) speed??(c) which of the answers in parts (a) and (b) would be different if there were appreciable air resistance?
(a) Work done by gravity on the watermelon is 1,182 J.(b)the watermelon's (i) kinetic energy just before it strikes the ground is 1,176.6 J and (ii) speed just before it strikes the ground is 48.49 m/s.The answer to part (b) would be different if there were appreciable air resistance.
(a)The given values are:
Mass of watermelon, m = 4.80 kg
Height from which watermelon is dropped, h = 25.0 m
Work done by gravity on the watermelon when it is displaced from the roof to the ground can be calculated as follows:
Work done by gravity, W = mg hwhere,g = acceleration due to gravity = 9.81 m/s²m = mass of the watermelon = 4.80 kg
h = height of the building from which the watermelon is dropped = 25.0 m
Substituting these values, we get:W = (4.80 kg) (9.81 m/s²) (25.0 m)W = 1,182 J
Therefore, the work done by gravity on the watermelon during its displacement from the roof to the ground is 1,182 J.
(b) The watermelon's (i) kinetic energy and (ii) speed just before it strikes the ground is:(i) Kinetic energy of the watermelon just before it strikes the ground can be calculated as follows:
Initial potential energy = mghInitial potential energy, U = (4.80 kg) (9.81 m/s²) (25.0 m)U = 1,176.6 J
Final kinetic energy, K = Initial potential energy, U
Therefore, Kinetic energy of the watermelon just before it strikes the ground is 1,176.6 J.
(ii) Let v be the speed of the watermelon just before it strikes the ground.
Kinetic energy = 0.5mv²where,m = mass of the watermelon = 4.80 kgK = Kinetic energy of the watermelon just before it strikes the ground = 1,176.6 J
Substituting these values, we get:K = 0.5mv²1,176.6 J = 0.5 (4.80 kg) v²2,353.2 J/kg = v²
Taking square root of both sides, we get:v = 48.49 m/s
Therefore, the watermelon's (i) kinetic energy just before it strikes the ground is 1,176.6 J and (ii) speed just before it strikes the ground is 48.49 m/s.
(c) The answer to part (b) would be different if there were appreciable air resistance. The kinetic energy of the watermelon just before it strikes the ground would be lower if there were appreciable air resistance because some of the initial potential energy of the watermelon would be lost to the air due to air resistance.
This means that the final kinetic energy of the watermelon would be lower if there were appreciable air resistance.
Learn more about air resistance here:
brainly.com/question/4428352
#SPJ11
the ac source puts out a voltage and has an adjustable frequency of. ac-rl-circuit.svg as the frequency is increased, what happens to the current in the circuit?
As the frequency of an AC source is increased, the current in an AC-RL circuit increases, up to the point where the inductive reactance of the inductor equals the resistance of the resistor. This is known as the resonant frequency of the circuit.
At the resonant frequency, the current reaches a maximum value and remains constant, regardless of further changes in the frequency. Above the resonant frequency, the current begins to decrease as the inductive reactance of the inductor increases faster than the resistance of the resistor. This is known as the anti-resonance frequency of the circuit.
In a series AC-RL circuit, the current is in phase with the voltage and the voltage and current are 90 degrees out of phase in a parallel AC-RL circuit. The total current in the circuit is determined by the frequency, inductance and resistance in the circuit, and the impedance of the circuit. The impedance is the ratio of the voltage to the current, and it increases as the frequency increases. This means that the current decreases as the frequency increases, as the inductor has an increasing inductive reactance.
The maximum current in the circuit is achieved when the inductive reactance of the inductor equals the resistance of the resistor, known as the resonant frequency of the circuit. Above the resonant frequency, the current begins to decrease as the inductive reactance of the inductor increases faster than the resistance of the resistor.
For more such questions on Resonant frequency.
https://brainly.com/question/28288820#
#SPJ11
a block (mass m) slides down- wards an inclined rough plane. determine the acceleration. under what circumstances tilt over is excluded?
The block sliding downwards on an inclined rough plane accelerates with a magnitude of g sinθ − µg cosθ, where µ is the coefficient of kinetic friction. The maximum angle that the plane can make with the horizontal is tan−1 µ.There are no circumstances in which tilting over is excluded.
When a block of mass m slides down on an inclined rough plane, the force acting on it is its weight, which is in a downward direction. This can be resolved into two components: one that is parallel to the plane and the other that is perpendicular to it. The former tends to move the block down the plane, while the latter counteracts the normal force acting on the block. The acceleration of the block can be calculated as a result of the net force acting on it.
µ is the coefficient of kinetic friction.
The angle of the plane with the horizontal is denoted by θ.
The acceleration of the block is given by:
a = g sinθ − µg cosθUnder certain circumstances, tilting over is avoided. A block can be prevented from tilting over on an inclined plane by ensuring that the center of gravity of the block lies within the base of the plane.
Learn more about force acting: https://brainly.com/question/17988534
#SPJ11
which objects should be included within the system in order to make an energy analysis as easy as possible?
In order to make an energy analysis as easy as possible, the following objects should be included within the system: Data logging instrumentation, Microprocessor based controllers, and Electronic load controllers.
What is an Energy analysis?An Energy Analysis is a method of determining the energy consumption of a system. It is done to help identify and evaluate opportunities to reduce energy usage and cost, improve efficiency and reduce the environmental impact of the energy consumed.
Energy analyses assist in the identification of system inefficiencies and provide a basis for energy management decisions.
The objects included in the system to make energy analysis as easy as possible are as follows:
Data logging instrumentation: This is used to gather data from sensors that measure a variety of environmental factors such as temperature, humidity, and air quality. Data loggers can be connected to various devices and can store data over time. These devices are used to monitor the performance of equipment and systems and identify opportunities to improve energy efficiency.Microprocessor-based controllers: These are devices that use microprocessors to control the operation of mechanical or electrical systems. They are used to monitor and control HVAC systems, lighting systems, and other building automation systems.Electronic load controllers: These devices are used to manage the electrical load on a system. They are used to prevent system overloads and help maintain the efficiency of equipment by reducing the amount of electricity used. They are used in a variety of applications including HVAC systems, lighting systems, and other building automation systems.To know more about "Microprocessor" refer here:
https://brainly.com/question/30558959#
#SPJ11
momentum and simple 1d collisions phet lab answers
Introduction:When objects move, they havemomentum.Momentum, p, is simply the product of an object’s mass (kg) andits velocity (m/s).The unit for momentum, p, is kgm/s.During a collision, an object’s momentumcan be transferred toimpulse, which is the product of force (N) and time (s) over which the force acts.This allows us to write the momentum-impulse theorem:
The resultant force, F, and its duration, t, when the force is constant, are multiplied to create the force's impulse. Motion is changed by the impulse of force, which in turn modifies momentum.
The resultant force, F, and its duration, t, when the force is constant, are multiplied to create the force's impulse. Motion is changed by the impulse of force, which in turn modifies momentum.In order to modify the motion of something, a certain amount of force must be exerted for a certain period of time. It is F t as a result of that.For instance, you temporarily apply force to a ball to modify (or transfer) its momentum when you hit it with a cricket bat.The wall is subjected to an enormous force. Impulse is the term used to describe the action taken in this case by the car in a split second.To know more about force
https://brainly.com/question/30844931
#SPJ4
The nervous system of the human body contains axons whose membrane each act as small capacitors. A membrane is capable of storing 1.2x10^-9C of charge across a potential difference of 0.070V before discharging nerve impulses through the body. What is the capacitance of one of these axon membranes
The capacitance of one of these axon membranes is 1.7× 10⁻⁸ Farad. The nervous system of the human body contains axons whose membrane each act as small capacitors.
What is Capacitance ?The ability of a material object or device to store electric charge is referred to as capacitance. It is defined as the change in charge as a result of a difference in electric potential, expressed as a ratio of those quantities. There are two types of capacitance that are commonly recognized: self capacitance and mutual capacitance. An electrically charged object exhibits self capacitance, which is measured as the electric potential between the object and ground. Mutual capacitance is the measurement of capacitance between two components, and it is especially important in the operation of a capacitor, which is a basic linear electronic component designed to add capacitance to an electric circuit.
use formula ;
C = [tex]\frac{Q}{V}[/tex]
Q = 1.2x10⁻⁹C
V = 0.070 V
Charge C = 1.7× 10⁻⁸ Farad
To know more about Capacitance , visit ;
brainly.com/question/28445252
#SPJ1
what are the angles a and b in the actual molecule of which this is a lewis structure?
The actual angles a and b in the molecule of which this is a Lewis structure are approximately 120°.
Lewis structures are a method for representing molecules using symbols for atoms and dots to show shared pairs of electrons. In the actual molecule, the positions of the atoms and the angles between them are not necessarily exactly the same as in the Lewis structure. However, based on the Lewis structure, we can make some predictions about the arrangement of atoms and the angles between them using the concept of valence shell electron pair repulsion (VSEPR).
According to VSEPR theory, the valence electron pairs in the outer shell of an atom will try to move as far apart from each other as possible to minimize repulsion. This leads to certain geometric arrangements of atoms and electron pairs, and certain bond angles.For the Lewis structure shown in the image, there are three bonded pairs of electrons and one lone pair of electrons around the central nitrogen atom. This corresponds to a tetrahedral arrangement with a bond angle of 109.5°. However, the lone pair of electrons exerts greater repulsion than the bonded pairs, which compresses the bond angles slightly.
The actual angles a and b are approximately 120°, which is slightly less than the tetrahedral angle of 109.5°.Therefore, the answer is approximately 120°.
Learn more about Lewis structure: brainly.com/question/20300458
#SPJ11
Two batteries connected in series with the negative terminal of one connected to the negative terminal of the other will have an overall voltage equivalent to the:
They will have an overall voltage equivalent to the sum of the individual battery voltages.
Connection of batteries in seriesWhen two batteries are connected in series, the negative terminal of one battery is connected to the positive terminal of the other. This creates a circuit in which electrons flow from the negative terminal of the first battery, through the circuit, and into the positive terminal of the second battery.
The overall voltage of the combined batteries will be equal to the sum of the individual battery voltages. For example, if two batteries are connected in series and each has a voltage of 1.5V, then the total voltage of the combination will be 3V.
This is because the voltage of the first battery is added to the voltage of the second battery. The same principle applies when more than two batteries are connected in series. The total voltage of the combination will be equal to the sum of the individual battery voltages.
Learn more about series connection here:
https://brainly.com/question/19865219
#SPJ1
the electric current as a function of voltage of a wire is presented by the graph. what is the resistance of the wire?
2.3
0.6
3.0
1.7
The resistance of the wire is the slope of the line and it is 1.7
What is the resistance of a wire?The resistance of a wire is a measure of how much it opposes the flow of electric current.
It is defined as the ratio of voltage across the wire to the current passing through it, and it is measured in ohms (Ω).
The resistance of the wire is the slope of the graph and this calculated by
= change in the voltage / change in the current
= (5 - 0) / (3 - 0)
= 5 / 3
= 1.6667 approximately 1.7
Learn more about ohms at:
https://brainly.com/question/14296509
#SPJ1
What is the reaction time for someone who lets 7 inches fall on a meter stick before the catch it?
A. 1.0 s
B. 0.19 s
C. 0.33 s
D. 0.08 s
Show the work for determining the reaction time of the person...show symbolic solution then numerical solution.
We must apply the following formula to determine the person's reaction time: [tex]d = 1/2 at^2[/tex] where: The distance travelled is d. (in this case, the distance the metre stick fell, which is 7 inches or 0.1778 meters). The reaction time is t.
How is reaction time distance determined?The distance is influenced by the speed and reaction time (in seconds) (in feet per second).Reaction Distance = Response Time x Speed is the formula for calculating it.
What is response time in 11th-grade physics?After recognising the need for them, a driver uses the brakes in 0.20 seconds. This is referred to as the driver's reaction time. if he's operating a vehicle
To know more about reaction time visit:-
brainly.com/question/11290682
#SPJ1
The maximum tension that a 0.50 m
string can tolerate is 14 N. A
0.25-kg ball attached to this string
is being whirled in a vertical circle.
What is the maximum speed the
ball can have the top of the circle?
the string experiences max tension at the lowest point,
By Work energy theorem, the min speed required at the lowest point to complete a vertical circle is [tex]\sqrt{5gl}[/tex] where L is the length of the string, corresponding to this the max tension comes out to be 6mg=15N, thus we can say that the ball will never be able to complete the vertical circle,
this is the actual scenario, and the question is irrelavent.
but if need be, to get an answer,
at the top point,
T + mg = m[tex]v^{2}[/tex]/r
14 + 15 = 0.25*[tex]v^{2}[/tex]*2
[tex]\sqrt{58\\}[/tex] = v