Answers
Answer:
Position A/Position E
\(K = E\), \(U = 0\)
Position B/Position D
\(K = (1-x)\cdot E\), \(U = x\cdot E\), for \(0 < x < 1\)
Position C
\(K = 0\), \(U = E\)
Explanation:
Let suppose that ball-Earth system represents a conservative system. By Principle of Energy Conservation, total energy (\(E\)) is the sum of gravitational potential energy (\(U\)) and translational kinetic energy (\(K\)), all measured in joules. In addition, gravitational potential energy is directly proportional to height (\(h\)) and translational kinetic energy is directly proportional to the square of velocity.
Besides, gravitational potential energy is increased at the expense of translational kinetric energy. Then, relative amounts at each position are described below:
Position A/Position E
\(K = E\), \(U = 0\)
Position B/Position D
\(K = (1-x)\cdot E\), \(U = x\cdot E\), for \(0 < x < 1\)
Position C
\(K = 0\), \(U = E\)
Related Questions
A local community has land for a park located along a river. The bank is starting to erode. Citizens want to use ideas based on science to solve the erosion problem. Which idea would best help this community protect the riverbank from eroding?
A. Adding more soil to the bank will protect existing land from eroding away.
B. Watering the bank daily will make existing soil heavier so it will not erode.
C. Building a rock wall along the bank will keep soil in place so water cannot erode it away.
D. Allowing individuals to walk near the edge of the bank will compact the soll so it will not erode,
if there is something other then the answer just comment it.
Answers
Answer:
C.
Explanation:
This is to support from being eroded a foundation to that will separate the water from the soil and to avoid it from being eroded.
Developing a Strategy
Now that you have an obstacle in mind, take another few minutes and think about which success strategy might best help you overcome this obstacle. Write this strategy in the box below:
Answers
Explanation:
Look at your resources around you, find ways to cope with the situation.
Look at your environment or what is there around you that can help you.
Is there anyone that can help you.
Think more.
Try thinking outside of the box
Don't be logical
I wasn't sure if you meant this mentally or physically.
The initial velocity of a micro van is 15 m/s. It gains a velocity of 40 ms in 10 seconds. Calculate the average velocity and acceleration of the [Ans: 27.5 m, 25 m/s d/ A racing car starts from rest. If it gains an acceleration of 5m/s in 10 seconds, calculate the final velocity. (Ans: 50 m van.
Answers
Answer:
\({ \bf{average \: velocity = \frac{15 + 40}{2}}} \\ = 27.5 \: {ms}^{ - 1} \\ { \bf{acceleration = \frac{v - u}{t} }} \\ = \frac{40 - 15}{10} \\ = 2.5 \: {ms}^{ - 2} \\ \\ { \tt{second \: qn : }} \\ { \bf{final \: velocity =u + at }} \\ v = 0 + (5 \times 10) \\ = 50 \: {ms}^{ - 1} \)
A hydraulic lift raises 1140 kg car through a height of 2.4 m. What is the potential energy
stored in the car?
Answers
Why does an object that is sliding across carpet slow down?.
Answers
Answer:
. Carpet has a rougher surface than the bare floor, so there are more areas for the object to have friction with the rougher surface and slow down.
Explanation:
An object that is sliding across carpet slow down because of friction acting between its rougher surface and the surface of the object.
What is friction?When two bodies come in touch with each other, friction, a sort of relative force, acts as a resistance. In other words, friction force opposes the relative motion of two bodies when they come into touch with one another.
When an object is sliding across carpet, it has to pass through a surface which is more rough compare to plane surface. So, frictional force will be greater in this case compare to plane surface. This frictional force resists the sliding of the object and the object slows down gradually.
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Why does the moon show phases in the course of a month?.
Answers
I hope this was helpful ;)
A rock is dropped from a height of 2.7m. How fast is it going when it hits the ground?
PLEASE HELP ME!!!
Answers
Determine the initial velocity of a marble that lands 1.8m away from a tabletop that is 0.8m from the ground.
Acceleration due to gravity = 9.85
0 2.25 m/s
2.6 m/s
0 1.8 m/s
4.5 m/s
Answers
Answer:
4.5 m/s
Explanation:
\(s_x\) = Horizontal displacement = 1.8 m
\(s_y\) = Vertical displacement = 0.8 m
\(u_x\) = Horizontal velocity
g = Acceleration due to gravity = \(9.81\ \text{m/s}^2\)
t = Time taken to fall down
\(s_y=u_yt+\dfrac{1}{2}gt^2\\\Rightarrow 0.8=0+\dfrac{1}{2}\times 9.8\times t^2\\\Rightarrow t=\sqrt{\dfrac{2\times 0.8}{9.8}}\\\Rightarrow t=0.4\ \text{s}\)
\(s_x=u_xt+\dfrac{1}{2}a_xt^2\\\Rightarrow 1.8=u_x\times 0.4+0\\\Rightarrow u_x=\dfrac{1.8}{0.4}\\\Rightarrow u_x=4.5\ \text{m/s}\)
The initial velocity of the marble is 4.5 m/s.
A football player is running back and forth along the sideline of the football field. He starts at the 50 yard line, in the middle. He runs to the left all the way to the 20 yard line, then he runs to the right and stops at the 40 yard line on the other side of the field. What is the total distance travelled and what is his displacement?
Answers
Answer:
20 yards East
Explanation:
The question states he starts at the 50 yard line, and didn't imply that he'd ran for 50 yards already. Effectively, that said 50 yard would not count.
The question proceeded to saying he ran leftwards for 20 yards. This is the distance, or displacement that we would use as the first measurement. Running 20 yards in the Eastern direction.
The question then proceeded again, to saying he ran rightwards for another 40 yard. By so doing, he eclipsed the initial 20 yards he'd ran. And added few more yards..
40 - 20 = 20, meaning, he ran 20 more yards in the rightward direction.
Therefore, his displacement would be 20 yards to his right or say, Eastern direction.
Can you think of a way to explain Hubble's Law other than the
standard Big Bang idea, which includes the concept of a Universe
with no center and no edge?
Answers
An alternative way to explain Hubble's Law without relying on the standard Big Bang idea of a universe with no center and no edge is through the concept of a "tired light" hypothesis.
According to this hypothesis, the redshift observed in distant galaxies is not due to their motion away from us in an expanding universe, but rather the result of photons gradually losing energy as they travel through space.
In the tired light scenario, the wavelength of light is thought to stretch over time due to interactions with matter or other unknown processes. As a result, the light from distant galaxies appears redshifted, mimicking the effect of cosmic expansion. This explanation implies that the universe may have a finite size and a center, challenging the notion of an infinite and uniformly expanding universe.
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Write down the value of
Answers
an uncharged capacitor is connected to the terminals of a 4.0 v battery, and 12 μc flows to the positive plate. the 4.0 v battery is then disconnected and replaced with a 8.0 v battery, with the positive and negative terminals connected in the same manner as before.
Answers
The additional charge that flows to the positive plate from the 8 Volts battery is 12 x 10⁻³ Coulomb's.
We have an uncharged capacitor which is charged in two different ways using battery of two different voltages. Firstly, it is connected to the terminals of a 4.0 V battery, and 12 μc of charge flows to the positive plate. Then, the 4.0 V battery is disconnected and replaced with a 8.0 V battery
We have to determine the Additional charge that flows to the Positive plate from this 8 V battery.
What is Capacitance ?Capacitance is the ability of an object to collect and store energy in the form of an electrical charge. Mathematically -
C = Q/V
According to the question, we have -
Electric potential of battery 1 = V[1] = 4 V
Charge flow from battery 1 to the positive plate = Q[1] = 12 x 10⁻³ C
Electric potential of battery 2 = V[2] = 8 V
Now, using the following relation, we will find Q[2] {Charge flow from battery 2 to the positive plate} →
V[1] / V[2] = Q[1] / Q[2]
Substituting the values -
Q[2] = (12 x 10⁻³ x 8)/4 = 24 x 10⁻³ C
Additional Charge that flowed to the positive plate →
Q[2] - Q[1] = 12 x 10⁻³ Coulomb's
Hence, the additional charge that flows to the positive plate is \(12\times 10^{-3}\) Coulomb's.
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[ The question given is incomplete, the complete question is -
"An uncharged capacitor is connected to the terminals of a 4.0 v battery, and 12 μc flows to the positive plate. the 4.0 v battery is then disconnected and replaced with a 8.0 v battery, with the positive and negative terminals connected in the same manner as before. How much additional charge flows to the positive plate" ]
witch of the following is the correct formula for calculating density
density=mass/volume
density=volume/mass
density=mass + volume
density= mass - volume
Answers
Answer:
density=mass/volume
Explanation:
density is commonly expressed in units of gram per cubic centimetre
hope it was helpful
The mass is 2. 0 kg. If the net force is 10. 0 n, what is the acceleration? (number only).
Answers
The acceleration is 8 m/s²
Force is said to be the rate of acceleration of a body of a particular from one distance to another. It is a vector quantity. It has a magnitude and direction. It is calculated by
Force = mass x acceleration
Given,
mass = 2 kg
force = 10 N
Acceleration = ?
From the given value and the formula, we can calculate,
Acceleration = Force / mass
Acceleration = 10 / 2
Acceleration = 8 m/s²
Therefore, the acceleration of the body having mass 2 kg and force 10 N is 8 m/s².
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The speed of sound in a particular fluid is 1480 m/s. What is the wavelength of sound waves of frequency 23 kHz that travel through the fluid?
6. 4 cm
5. 5 cm
2. 1 m
3. 2 cm
Answers
The wavelength of sound waves of frequency 23 kHz that travel through the fluid is 0.064 metres.
V = 1480 m/s
f = 23 kHz
We know the relation
V = f λ
V= velocity in a particular medium
f = frequency
λ = wavelength of sound wave
λ= \(\frac{1480}{23000}\)
λ = 0.064 metre
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The unit of area is a derived unit. Why?
Answers
Explanation:
area=length(m) ×breadth(m) . The unit of area is expressed in terms of fundamental units m^2.thus it is derived unit
The elevator moved from the 15th floor to the 10th floor at a constant speed. does the PE and KE increase, decrease, or stay constant?
Answers
As the elevator is moved from 15th floor to the 10th floor at a constant speed. It means that the height is decreasing but the speed of the elevator is moved at a constant.
It results that the kinetic stays the same but the potential energy is decreasing.
Phil Physiker standing at the edge of a cliff throws one ball straight up and another ball straight down, both with the same speed. 30th balls hit the ground at
Answers
Phil Physiker throws two balls, one straight up and another straight down, both with the same speed from the edge of a cliff. Since the balls are thrown with the same speed, they will experience the same gravitational force acting on them.
However, the initial velocity for each ball will be opposite in direction.For the ball thrown upwards, the initial velocity is positive, and it will slow down due to gravity until it reaches its peak height and then falls back down. For the ball thrown downwards, the initial velocity is negative, and it will accelerate due to gravity as it falls.
Despite their different initial velocities, both balls will hit the ground with the same final velocity. This is because the distance they fall, the gravitational force acting on them, and their mass are the same. The only difference is the time it takes for each ball to reach the ground. The ball thrown upwards will take longer because it must first decelerate, stop at the peak, and then accelerate downwards, while the ball thrown downwards only accelerates during its fall.
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Which is normally greater, the energy in ordinary sound or the energy in ordinary light? how does the speed of sound compare to the speed of light?
Answers
The energy in ordinary light is greater than the energy in ordinary sound
Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another.
Energy is a physical system's ability to perform labor. The capital letter E is a typical sign for energy. The joule, denoted by the letter J, is the common unit. The energy produced by one newton's (1 N) worth of force acting over one meter's (1 m) worth of displacement is measured in joules (1 J). Because it is a fundamental human requirement, energy plays a significant role in our daily lives.
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Location A on the surface of Earth bas a much higher temperature than Location Which statement is most likely true A.Both locations are at the poles B.Both are at the equator C.Location A is at the equator and Location B is the poles D.Location at the poles and location B is the equator
Answers
Answer:
The anwser is b
Explanation:
Answer:
the answer is B
I know because i just did it
why are you living on this world did god really create us?
Answers
we could neva know bro i have the same question like we have no scientific proof o nun sooo...
Okay, this is a song from the perspective of God.
The books you think I wrote are way too thick.
Who needs a thousand metaphors to figure out you shouldn’t be a DlCK?
And I don’t watch you when you sleep.
Surprisingly, I don’t use my omnipotence to be a ducking creep.
You’re not going to heaven.
Why the duck would you think I'd ever kick it with you?
None of you are going to heaven.
There’s a trillion aliens cooler than you.
You shouldn’t abstain from r a p e just because you think that I want you to.
You shouldn’t r a p e because r a p e is a ducked up thing to do.
Pretty obvious, just don’t duckin r a p e people, didn’t think I had to write that one down for you.
I don’t think m a s t u r b a t i o n is obscene.
It's absolutely natural and the weirdest ducking thing I’ve ever seen.
You make my job a living he||.
I sent gays to fix overpopulation and boy did that go well.
You’re not going to heaven.
dont you think life on earth could be heaven
julia performs an experiment to measure the wavelength of four different waves and records her data in the table below.a 2-column table with 4 rows titled julia's waves. the first column labeled wave has entries 1, 2, 3, 4. the second column labeled information has entries this wave has 3 centimeter amplitude, the distance from the midpoint to the crest is 6 centimeters, the distance from the midpoint to the trough is 12 centimeters, this wave has a 4 centimeter amplitude.which accurately ranks the waves from the lowest energy wave to the highest energy wavehow has the change in media affected the frequency of the wave?
Answers
A wave's frequency varies when it moves from one medium to another. This is due to the fact that a wave's wavelength doesn't change when it enters a different medium, but its speed does. This is referred to as the frequency-wavelength relationship of the wave.
Based on the information provided in the table, the waves can be ranked from lowest energy to highest energy as follows: wave 1, wave 2, wave 3, and wave 4.
This is because wave energy is directly proportional to its amplitude and frequency, and in this case, the amplitude of wave 1 is the lowest, followed by wave 2, wave 3, and wave 4.
When a wave travels from one medium to another, its frequency changes.
This is because the speed of the wave changes when it enters a different medium, while its wavelength remains constant. This is known as the wave's frequency-wavelength relationship.
When the wave enters a denser medium, its speed decreases, and its frequency decreases as well. On the other hand, when the wave enters a less dense medium, its speed increases, and its frequency increases as well. Therefore, the change in media can affect the frequency of the wave.
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Which best describes the runners? Daniela had a 5 meter head start, and Leonard caught up to her at 25 meters. Daniela ran faster than Leonard through the entire race. Daniela gave Leonard a 5 meter head start and caught up to him at 25 meters. Daniela ran slower than Leonard, but she went faster at the end.
Answers
Daniela had a 5-meter head start and Leonard caught up to her at 25 meters best describes the runners. Option A is correct.
What is the distance?Distance is a numerical representation of the distance between two objects or locations.
The distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.
The graph shows that Daniela had a 5-meter head start and Leonard caught up to her at 25 meters
Hence option A is correct.
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Answer:
Daniela had a 5 meter head start, and Leonard caught up to her at 25 meters.
Explanation: took the unit test
a sea turtle swims a distance of 19 m in a time of 2s what is the turtle speed?
A. 38m/s
B.0.1m/s
C. 21m/s
D. 9.5m/s
Answers
Answer:
D: 9.5
Explanation:
2 seconds divided by 1 is 1 so 19 divided by 1 is 9.5
While having a discussion, Technician A says that the longer a conductor is, the more resistance it has and the smaller its diameter, the less resistance it has. Technician B says that the larger its diameter, the less resistance it has. Who is correct
Answers
Answer:
Technician B is correct by saying that the larger diameter (i.e the conductor's diameter), the less resistance it has.
Explanation:
According to the law of electrical resistance, the resistance of a metallic conductor is proportional to the length of the conductor, but inversely proportional to the cross-sectional area of the conductor.
\(R = p\frac{l}{A}\)
where R is the resistance of the conductor.
p is the intrinsic resistivity of the material with which the conductor is made.
l is the length of the conductor.
A is the cross-sectional area of the conductor.
This law simply means that if we increase the length of a conductor, or reduce the area, the electrical resistance of the conductor will increase, and vice versa.
Technician B is correct by saying that the larger diameter (i.e the conductor's diameter), the less resistance it has.
This is because the area of the conductor is proportional to the cross-sectional area. And the larger the cross-sectional area of a conductor, the lesser its resistance will be.
Two friction less blocks, having masses of 8.0 kg and 2.0 kg, rest on a horizontal surface. If a force applied to the 8.0 kg block gives it an acceleration of 3.0 m/s2, then the same force will give the 2.0 kg block an acceleration of ________
Answers
The acceleration that is produced by the 2 Kg force is 12 m/s^2.
What is the force?We know that from the Newton first law, it is the magnitude of the force that is imparted to a body that produces the given acceleration. It is now safe to say that the force that is exerted on a body is directly proportional to the acceleration of the body. This is the fall out that we can take from the Newton law as stated above.
In this case, we have seen that the Two friction less blocks, having masses of 8.0 kg and 2.0 kg, rest on a horizontal surface.
Now;
F = ma
F = force
m = mass
a = acceleration
F = 8.0 kg * 3.0 m/s2
F = 24 N
We are told that the same force was applied to the 2 Kg mass
a = F/m
a = 24 N/2 Kg
a = 12 m/s^2
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The fastest human ever recorded was Usain Bolt at 43 km/h. If a white tail
deer can run 3 km in 3 minutes and 45 seconds, how many km/h faster would Usain Bolt need to run to catch a deer?
Please show work! Will mark brainliest!
Answers
Deer 3km/3.75min because 45sec/60sec = .75min
All we need to do is convert
3km/3.75min * 60min/1h = 48km/h
Usain bolt 43km/h - deer 48km/h
= 5km/h
a car travelling at a speed of 45km/h takes 20 minutes to reach its destination.what distance has the car travelled
Answers
Distance is unknown so it is speed * time
45km/h * (20/60)h
=15km
First, we need to do a type conversion. Because the types of the two given quantities are different. One is in minutes. The other is in hours. A vehicle that travels \(45\) kilometers in an hour travels how many meters in a second?
\(45km/h=\frac{45km}{1hour} =\frac{45km.1000}{1hour.3600} =12.5m/s\)A vehicle that travels \(12.5\) meters in a second travels how many meters in \(20\) minutes?
\(1200.(12.5)=15000m=15km\)A magnet can move in a coil of wire to produce electricity in which system?
A. Generator
B. Motor
C. Magnet
D. Transformer
Answers
Answer:
A. Generator
Explanation:
Hope this will help
Answer:
A. Generator
Explanation:
That is the correct answer
Help please physics!!!
Answers
Answer:
I think c is the answer.....
Answer:
D, because weight is dragging the object down. C would be friction holding the object back, and A would be the momentum generated by the person pushing the object.
Explanation: