Which statement describes what happens when Bret runs up a flight of stairs?

His kinetic energy increases.
His potential energy decreases.
His kinetic energy is converted into potential energy.
His potential energy is converted into kinetic energy.

Answers

Answer 1

Answer:

The answer is C) His kinetic energy is converted into potential energy.


Related Questions

The longest kick in CFL history was 83.2 metres. If the ball remained in the air for 4.12 seconds

Answers

87.32 I think is your awnser

two people are pushing a box north across the floor. on person pushes with a force of 20n, the other person pushes with an unknown force. if the net force acting on the box is 35n north, what is the unknown force?

Answers

it's 15 N because net force is total force so you take net force - known force = unknown force
Answer: 15 n




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A gas tank holds 50L. If the density of gasoline is 0.7g/ml, how much mass will the tank of gas have?

Answers

p=m/v 
0.7 g/ml = m/50L <--50000 mL 
0.7g/ml= m/50000 mL 
50000mL x 0.7 g/mL= m
35000 grams = mass 

Hope I helped :) 

Rank the following in order of increased size? A. Proton B. Nucleus C. Electron D. Atom

Answers

From largest to smallest- atom, nucleus, proton and electron

Final answer:

The correct order of increasing size from smallest to largest is: electron, proton, nucleus, atom. Electrons are the smallest particles in this list and form the cloud around the nucleus, which is made of larger protons and neutrons. Atoms include both the nucleus and the electron cloud, making them the largest structures listed.

Explanation:

In order to rank the following from smallest to largest in size, we need to understand the structure of an atom. An atom consists of a central nucleus, which contains protons and neutrons, surrounded by a cloud of electrons.

ElectronProtonNucleusAtom

An electron is the smallest particle among the ones listed. It is part of the cloud around the nucleus and has a negative charge. A proton is a positively charged particle that is one of the components of the nucleus and is larger than an electron. The nucleus, which consists of both protons and neutrons, is significantly larger than a single proton. The atom, consisting of the nucleus and electron cloud, is the largest of all listed components.

It is important to note that while protons and neutrons have roughly the same size, the nucleus varies in size depending on the number of protons and neutrons it contains. Electrons, on the other hand, being much smaller, do not contribute significantly to the overall size of the atom.

the approximate length of an unsharpened No.2 pencil is

Answers

It is roughly 7 3/8 inches long

Option (b) is correct. The approximate length of the unsharpened pencil is almost  [tex]\boxed{20\text{ cm}}[/tex] or [tex]\boxed{2\times10^{-1}\text{ m}}[/tex].

Explanation:

The measurement of the quantity is the most fundamental requirement for the  estimation of any quantity. The measurement of length of a body is done using the standard unit of measurement which is meter.

The approximate length of an unsharpened pencil is considered to be almost [tex]20\text{ cm}[/tex].

In order to express the length of the pencil in the standard unit of measurement of length, we should know about the conversion factor.

One meter is considered to be equal to the [tex]100\text{ cm}[/tex] of the length. The conversion factor can be expressed mathematically as:

[tex]n=\dfrac{1\text{ m}}{100\text{ cm}}[/tex]

The length of the pencil can be expressed in terms of standard unit as:

[tex]\begin{aligned}l&=20\text{ cm}\left(\dfrac{1\text{ m}}{100\text{ cm}}\right)\\&=2\times10^{-1}\text{ m}\end{aligned}[/tex]

Thus, option (b) is correct. The approximate length of the unsharpened pencil is almost  [tex]\boxed{20\text{ cm}}[/tex] or [tex]\boxed{2\times10^{-1}\text{ m}}[/tex].

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Answer Details:

Grade: Middle School

Subject: Physics

Chapter: Units and Measurements

Keywords:

length, approximate, unsharpended, pencil, standard unit, estimation, 20 cm, 0.2 m, quantity, measurement.

5 different types of evidence that show a chemical reaction has taken place

Answers

Change of odor, Change of color, Change in temperature, Light and/or heat is given off, and Formation of gasses or precipitates. Hope that helps :)


The evidence that shows that a chemical reaction has taken place is an alteration in odor a shift in color, a temperature shift, The emission of light or heat, and the formation of gasses or precipitates.

What is a Chemical Reaction?

One or more compounds, known as reactants, convert into one or more new ones, known as products, during a chemical reaction. Substances are made up of chemical building blocks or compounds.

Chemical interactions play some sort of role in technology, culture, and even life itself. For thousands of years, people have understood and used chemical reactions in a number of processes, such as burning fuels, smelting iron, making glass and pottery, brewing beer, producing wine, and making cheese.

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What is the kinetic energy of a 478 kg object that is moving with a speed of 15 m/s

Answers

the kinetic energy would be 53,775J:)

Answer:

107,550 J

Explanation:

Kinetic energy = 1/2 * mass * velocity^2

In this case, the mass of the object is given as 478 kg and the speed is given as 15 m/s.

Plugging these values into the formula, we get:

Kinetic energy = 1/2 * 478 kg * (15 m/s)^2

Simplifying the equation, we have:

Kinetic energy = 1/2 * 478 kg * 225 m^2/s^2

Multiplying the numbers together, we get:

Kinetic energy = 107,550 kg*m^2/s^2

Simplifying further, we can express the unit of kinetic energy as joules (J):

Kinetic energy = 107,550 J

Which of the following is an example of velocity ?
A. 10
B. 10 m/s to the right
C. 10 m to the right
D. 10 m/s

Answers

b) 10 m/s to the right

10 m/s to the right is an example of the velocity of an object. Thus, the correct option is B.

What is Velocity?

Velocity can be defined as the directional speed of an object which is in motion as an indication of the rate of change in the position of an object as observed from a particular frame of reference by the observer and it is measured by a particular standard of time.

Velocity is a vector quantity. This is because, velocity has both the magnitude and direction. The SI unit of velocity is meter per second. The velocity of an object can be calculated by the formula:

Velocity = Displacement/ Time

Therefore, the correct option is B.

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After the last ice age, stranded ice blocks left behind by the continental glacier melted and formed
a.
kettles.
b.
cirques.
c.
drumlins.
d.
moraines.

Answers

the answer is kettles or a

Answer:

A kettles

Explanation:

describe the properties of gases

Answers

Gases have three characteristic properties:
(1) they are easy to compress,
(2) they expand to fill their containers, and
(3) they occupy far more space than the liquids or solids from which they form.

Answer:

Gases has the following properties:  

i) Gases are less dense than liquids and solids  

ii) Gases molecules has large space between them so, they can be easily compressed  

iii) Gases has indefinite shape and volume  

iv) Gases can occupy all the space provided  

v) Gases molecules has random motion and collisions

vi) When gases are heated their volume increases  

vii) Gases can diffuse from one place to another due to the difference of concentration of molecules

Please i really need to get this done today..

Explain how the energy of a rubber ball is transformed as it rolls down a ramp. Give evidence that the energy of the ball remains the same at all points on the ramp.


Answers

The ball at the top of the ramp has potential energy but when it rolls down or when it is rolling down it has kinetic. The ball has kinetic energy when it is moving or rolling down the ramp but there is Potential energy when the ball is at the top or is sitting at the bottom still. when the ball is rolling down the ramp it has heat energy because of how it get speed and it starts to heat up.

Answer:

The energy of the ball is transformed from potential energy to kinetic energy when it is released at the top of the ramp. When the ball rolls down the ramp, kinetic energy increases and potential energy decreases. The law of conservation of energy says that energy can not be created or destroyed, it can be tranformed or transferred. The total energy of the ball stayed the same because potential and kinetic energy are inversely related.

Explanation:

watches a 2000 klilogram car crash into a wall with a force of 30000 newtons. what is the acceleration of the car at impact?

Answers

mass=2000 kg
force = 30000 N
a= force /mass
a=30000/2000
a=15 m/second square

A planet is orbiting a nearby star. Suppose that the star’s gravity increases over time. What effect will this increase most likely have on the planet’s path of motion?

Answers

The planet would stay in the same orbit but start revolving faster.
(Its year would get shorter.)

Answer:

B

Explanation:

A 0.5 kg ball is tied to a swung in a circle with a radius of 0.400m.If the ball is accelerating at 58.8 m/s^2,what is the tangential velocity of the ball?

Answers

If the acceleration is centripetal then the formula is a=v^2/r
Plug in 58.8=v^2/.400 solve for v
V=12.12 m/s

Which of the following is a type of object that might contain billions of stars?
A.
a solar system
B.
a galaxy
C.
an asteroid
D.
a planetary system

Answers

A galaxy because that is the largest group and contains many things.

Answer:

A galaxy because that is the largest group and contains many things.

Explanation:

Two objects of the same mass are on two different planets. Planet A has a force of gravity that is stronger than that of Planet B. How will the weights of the objects compare to each other?

Answers

Final answer:

Objects of the same mass on different planets will have different weights depending on the local gravity. An object will weigh more on Planet A with stronger gravity than on Planet B with weaker gravity, even though the mass is constant.

Explanation:

Two objects with the same mass on different planets will have different weights if the planets have different strengths of gravitational force. On Planet A, where the force of gravity is stronger, an object will weigh more compared to its weight on Planet B, where the force of gravity is weaker. This is because weight is the force exerted by the gravitational field of a planet on an object, which can be calculated using the equation F = ma, where m is the mass and a represents the acceleration due to gravity (g) on that planet. Therefore, if gravity is stronger on Planet A, the acceleration due to gravity is greater, resulting in a greater weight for the object, even though its mass remains unchanged.

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The weights of two objects with the same mass will differ on different planets due to varying gravitational forces. The object on the planet with the stronger gravitational force will weigh more.

The weights of objects depend on both their mass and the gravitational force acting upon them. Since both objects have the same mass but are on different planets with different gravitational forces, their weights will differ.

Specifically, the object on Planet A, which has a stronger force of gravity, will weigh more than the object on Planet B, which has a weaker gravitational force.

Weight is calculated by the equation:

Weight = Mass × Gravitational Force

If the gravitational force on Planet A is stronger, then for the same mass, the weight will be greater. For example, if an object has a mass of 10 kg and Planet A has a gravitational force of 15 N/kg, the weight will be:

Weight = 10 kg × 15 N/kg = 150 N

If the same object is on Planet B with a gravitational force of 10 N/kg, then the weight will be:

Weight = 10 kg × 10 N/kg = 100 N

Thus, even though the mass of the objects is the same, their weights are different due to the different gravitational forces on each planet.

what's the difference between asexual reproduction and sexual reproduction?!?!

Answers

Hello!

This is simple, asexual reproduction involves only one parent, and does not need to involve the fusion of gametes. On the other hand, Sexual reproduction involves two parents and does need to fuse together different gametes and needs the genes from both sexes of the plants. 

I hope this helped!

I am, yours most sincerely,
SuperHelperThingy
Sexual reproduction is the combination between the genetic material of both two parents while asexual reproduction produces offspring genetically identical to the one parent. Also, asexual reproduction produces without sex while sexual reproduction requires it. These are the most common differences between the two reproduction processes. 

I hope this helps!

Explain why streets and highways have speed limits rather than velocity limits

Answers

Speed is the distance and object travels per unit of time.Velocity on the other hand is the speed of an object in the direction of its motion. So, the difference between them is that velocity includes the direction of motion and speed does not. Streets and highways have speed limits rather than velocity limits because they only care about the speed of the vehicle, not about the direction. 
Final answer:

Speed limits are used on streets and highways instead of velocity limits because speed is a scalar quantity, meaning it only has magnitude and not direction. By imposing speed limits, authorities can regulate the maximum speed at which vehicles can safely travel, regardless of their direction.

Explanation:

Speed limits are used on streets and highways instead of velocity limits because speed is a scalar quantity, meaning it only has magnitude and not direction. Velocity, on the other hand, is a vector quantity that describes both magnitude and direction. By imposing speed limits, authorities can regulate the maximum speed at which vehicles can safely travel, regardless of their direction.


For example, if a street has a speed limit of 40 mph, it means that vehicles must not exceed this magnitude of speed, whether they are traveling east, west, north, or south. This ensures consistent enforcement and promotes safe driving practices for all vehicles.

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What two controls on a car cause a change in speed? What control causes only a change in velocity

Answers

The brake and gas pedal change speed in a car (brake slows it down, gas pedal speeds it up) and the steering wheel changes the velocity (it changes the direction). 

We have that for the Question "What two controls on a car cause a change in speed? What control causes only a change in velocity" it can be said that

a)

Accelerator Brake Pedal

b)

Brake Pedal

From the question we are told

What two controls on a car cause a change in speed? What control causes only a change in velocity

Generally

A car is been regulated or driven by many controls

But for the speed of a car will consider

Accelerator

The accelerator this is a control that regulate the speed of the vehicle by increasing and decreasing its speed in motion and initiating its motion

Brake Pedal

This is a control that regulate the speed of the vehicle by decreasing its speed in motion

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When a 440-Hz tuning fork and a piano key are struck together, five beats are heard. If the pitch of the note on the piano is lower than the tuning fork, what is the frequency of the note?

Answers

440Hz < n2
n2 - 440 = 5
n2 = 445hz

What happens to light as the ocean increases in depth

Answers

Light is the major component required by marine organisms. The penetration of the light varies with the depth of the ocean.

The penetration of the light rays decreases with an increase in depth. The light is unable to breach below 1000 to 1200 meters.

The light effect on the ocean can be explained as:

1. The seawater absorbs the red, orange, and yellow wavelengths, which causes the blue light to penetrate farther into the ocean. It gives the ocean its distinctive blue color.

2. The water absorbs the light rays as it penetrates deep into the ocean. The light rays get completely absorbed before it reaches the ground of the ocean.

3. The light cannot penetrate deep within the ocean, thus, the deep lengths of the ocean are still unknown to humans.

Thus, the light penetration decreases with an increase in the depth of the ocean.

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how would you describe a meter in english units

Answers

a yard is about 1 meter

Answer: a little longer than a yard (about 3 ft)

Explanation:

Please help with this question

Answers

The answer to this question would be: boiling point

Boiling point is the temperature when a substance will change form from liquid into gas or vapor. In this question, the liquid substance became vapor in 100° then it should be the boiling point.
Melting point is the temperature where the substance will change form from solid into a liquid so it is wrong. The other option is irrelevant

Describe Rutherford's contribution to the atomic model.

Answers

Rutherford (1871–1937) was responsible for a remarkable series of discoveries in the physics, especially in the atomic model.
He identified the atomic nuclei -  a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom.
The Rutherford model is a model of the atom we know today.

Answer:

Rutherford brought the concept of a nucleus. He said that the atom "had a tiny and heavy nucleus."

Determine the change in velocity of a car that starts at rest and has a final velocity of 20 m/S north

Answers

change in Velocity equals Velocity final - Velocity initial

20-0=20

Which of the following is the best name for CaF 2 ?

Answers

Answer:

calcium fluoride

Explanation:

Mass m, moving at speed 2v, approaches mass 4m, moving at speed v. The two collide elastically head-on. Find the subsequent speed of mass, m and 4m.

Answers

Refer to the figure shown below.

Let
v₁ and v₂ = velocities of masses m₁, m₂ after the collision, respectively.

Note:
In an elastic collision, both momentum and kinetic energy are conserved.

For conservation of momentum,
m(2v) + 4m(v) = m(v₁) + 4m(v₂)
6v = v₁ + 4v₂               (1)

For conservation of kinetic energy,
(1/2)m(2v)² + (1/2)4m(v²) = (1/2)m(v₁²) + (1/2)4m(v₂²)
8v² = v₁² + 4v₂²          (2)

Substitute (1) into (2).
8v² = (6v - 4v₂)² + 4v₂²
       = 36v² - 48 v₂v + 16v₂² + 4v₂²
20v₂² - 48v v₂ + 28v² = 0
v₂² - 2.4v v₂ + 1.4v² = 0
v₂ = 0.5[2.4v +/- v√(0.16)]
v₂ = 1.6v, or 0.8v
Correspondingly,
v₁ = -0.4v, or 2.8v

If KE were not conserved, the mass m should rebound with negative velocity.
Furthermore, it is unlikely that mass 4m would attain a velocity of 2.8v.
Therefore the acceptable solution is
v₁ = -0.4v and v₂ = 1.6v

Answer:
After the collision,
The mass m has velocity of -0.4v,
The mass 4m has velocity of 1.6v.
First mass (M1)= m, speed (V1) =2v Second mass(M2)= 4m, speed(V2)= v PRINCIPLE OF CONSERVATION OF MOMENTUM SAYS M1*V1+M2*V2= M1*V1f +M2*V2f where f = final speed finally speed is assumed same, therefore V1f=V2f =Vf m*2v +4m*v = (m+4m)Vf 6vm = Vf(5m) dividing both sides by 5m 6/5v=Vf 1.2v=Vf = final speed

From the top of a cliff, a person tosses a pebble straight downward with an initial velocity of -9.0 meters/second. After 0.50 seconds, how far beneath the cliff is the pebble?
a) -2.0
b) -3.9
c) -5.7
d) -10.3

Answers

y - yo = Vo*t - g * (t^2) / 2

Vo = - 9.0 m/s
t = 0.50 s

=> y - yo = -9.0 m/s * 0.5 s - 9.8 m/s^2 * (0.5s)^2 / 2 = - 4.5m - 1.225m = - 5.725 m.

Answer: option c) - 5.7

The speed of a wagon increases from 2.5 meters per second to 9.0 meters per second in 3.0 seconds as it accelerates uniformly down a hill. What is the magnitude of the acceleration of the wagon during this 3.0 second time interval?

Answers

Final answer:

The speed of the wagon increases from 2.5 m/s to 9.0 m/s over a 3 second interval, leading to an acceleration of 2.17 m/s².

Explanation:

This physics question involves the concept of acceleration. The acceleration of the wagon is determined by its change in speed per unit of time. In this case, the speed (or velocity) of the wagon increase from 2.5 meters per second to 9.0 meters per second over a 3.0 second time interval. The difference in speed is 9.0 m/s - 2.5 m/s = 6.5 m/s. Since this speed change happens over 3.0 seconds, the rate of change, or acceleration, is 6.5 m/s divided by 3.0 s which equals 2.17 m/s². Therefore, the magnitude of the acceleration of the wagon during this 3.0 second time interval is 2.17 m/s².

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What is Agent Object Notation? ( For Force Diagrams. )

Answers

F sub n is an example.
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