From the expression E = mgh for potential energy, how can I express the unit of energy, the joule, in terms of kilograms, metres and seconds? could anyone explain to me what this question is asking me for cuz I
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Science (energy)
1. What similarities do nuclear energy and chemical energy share? Choose all that apply. A. Both are types of kinetic energy. B. Both are types of potential energy. [CORRECT!] C. Both involve magnetic energy. D. Both involve stored energy. [CORRECT!] 2. A

Physics Please help !!
A single conservative force = (6.0x  12) N where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 23 J at x = 0. (a) Write an expression for U as a function of x, with U in

science
1.what similarities do nuclear energy and chemical energy share?pick all that apply A.both are types of kinetic energy. B.both are types of potential energy C.both involve magnetic energy D.both involve stored energy (I PICK B AND D) 3.the energy an object

Physics
what forms of energy are involved in the following situations? (choices: kinetic energy, potential energy  gravitational potential energy, elastic potential energy) a. a bicycle coasting along a level road b. heating water c. throwing a football d.

physics
During a rockslide, a 520kg rock slides from rest down a hillside that is 500m long and 300m high. The coefficient of kinetic energy between the rock and the hill surface is .25. a) If the GPE energy U of the rock –Earth system is zero at the bottom of

Science
We know that the law of conservation of energy states that energy can not be created or destroyed. It only changes form. Consider this energy transformation diagram. Assume that the energy input in this case is chemical potential energy and the useful

Science
This are all the answers for Potential Energy of a System Quick Check for Connexus students. Q1: Use the picture to answer the question. The girl in the picture is at the highest point in swinging and starts to come down. Which statement could describe the

History
4.)Which type of energy in the bungee cord prevents the bungee jumper from hitting the ground after a jump? A.)Kinetic energy B.)Elastic potential energy C.)Magnetic potential energy D.)Thermal energy

Science
Classify each of the following as examples of kinetic or potential energy. a) a car driving along a level road. b) an elastic band is stretched to twice its normal length c) a book is at rest on the top shelf of a bookcase d) a lightning bolt produces

Physics
For an electron moving in a direction of the electric field its potential energy _______ and its electric potential _________. Wouldn't the blanks be "increases" and "decreases"? because PE=mgh while V=kq/r

Physics
please check: Which of the following energy forms is associated with an object in motion? a. potential energy b. elastic potential energy c. nonmechanical energy d. kinetic energy i think its B Which of the following energy forms is associated with an

physics
A skier of mass 70kg is pulled up a slope by a motordriven cable. The acceleration of gravity is 9.8m/s^2. How much work is required to pull him 60m up a 30.7º slope (frictionless) at a constant speed of 3 m/s? answer in units of kJ. In this question, I

math
the formula for potential energy is p= mgh, where Pis potential energy, m is mass, g is gravity, and h is height. which expression can be used to represent g? 1 pmh 2 pmh 3 p/m0h 4 p/(mh)

math
the formula for potential energy is p=mgh, where p is potential energy, m is mass, g is gravity, and h is height. what expression can be used to represent g?

Physics
Consider the gravitational potential, kinetic, and total mechanical energies of a cart moving down an inclined ramp. (Also, let gravitational potential energy be defined to be zero when the cart is at the bottom of the ramp. A. Write an expression for the

physics
Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the waterEarth system each second? b) If all this energy could be converted to electrical energy (can’t happen)

Physics
A certain coaxial cable consists of a copper wire, radius a , surrounded by a concentric copper tube of inner radius c . The space between is partially filled (from b out to c ) with material of dielectric constant K. The goal of this problem is to find

Potential & Kinetic Energy
Determine the Initial potential energy of the skater. The mass of the skater is 50 kg The acceleration of gravity is 9.8 m/s2. Use the grid to determine the height of the top of the track PE = mgh; where m is mass, g is acceleration of gravity and h is

science(answer please)
please answer these 1.what similarities do nuclear energy and chemical energy share?pick all that apply A.both are types of kinetic energy. B.both are types of potential energy C.both involve magnetic energy D.both involve stored energy 3.the energy an

ap chemistry
a battery operated tool, such as a cordless drill, converts... a.) electrostatic energy to chemical potential energy b.) mechanical energy to thermal energy c.) thermal energy to mechanical energy d.) thermal energy to chemical potential energy e.)

physics
During a lighting discharge, 30C of charge move through a potential difference of 1.0 X 10^8V in 2.0X10^2s. The energy released by this lighting bolt is: a)1.5 X 10^11 J b) 3.0 X 10^9 J c) 6.0 X 10^7 J d) 3.3 X 10^6 J e) 1500 J Ok I am not really sure

physics
the maximum height a typical person can jump from a crouched start is about 60cm. By how much does the gravitational potential energy increase for a 72kg person in such a jump? Where does this energy come from? I know the formula for gravitational

science 8th grade
1. The thermal energy of an object is _____. (1 point) its potential energy its average kinetic energy its potential energy minus its kinetic energy its kinetic energy plus its potential energy Thanks, jessica :)

Physics
A 0.47 kg pendulum bob is attached to a string 1.2 m long. What is the change in the gravitational potential energy of the system as the bob swings from point A to point B where θ = 31°? I've tried using PE = mgh but I don't know where the 31 degrees

Science
6. what is the formula for gravitational potential energy? (1 point) a.KE=1/2MV^2 B. PE=KE C. PE=mgh D. 1/2MV^2=mgh I think its C, am i right?

Physics (please check)
A 6.0kg block is released from rest 80m above the ground. When it has fallen 60m its kinetic energy is: I got 1200J as my answer mgh=(6.0*9.81* 60m)=3531.6 PE + KE= (ME + KE) 3531.6 + KE= (6.0*9.81*80m) KE= 1177.2 is that right A 6.0 Kg block is thrown up

Mechanics
What is the decrease in elevation of a 4kg body whose kinetic energy increases from 20 J to 100 J as a result of moving downward along an inclined plane? set Potential energy change equal to KE change mgh= change in KE thanks a lot!

science
A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor? A. Both its potential energy and its kinetic energy decrease. B. Both its potential

physics
The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of a 760 µF capacitor is 315 V. (a) Determine the energy that is used to

Physics
What is his kinetic energy when his potential energy reduces to 1000 J? Express your answer to two significant figures and include the appropriate units

College Physics
A 22.9kg child is on a swing attached to ropes that are L = 1.33 m long. Take the zero of the gravitational potential energy to be at the position of the child when the ropes are horizontal. Part A)The child's gravitational potential energy when the child

Earth Science
1. Is it true that since energy cannot be created nor destroyed, the total energy of the river system remains constant? 2. What is the source of energy that powers the water cycle? a. sunlight insolation b. kinetic energy c. radioactive decay d.

Physics
For the following questions, assume the potential energy of the mass was 0.20 J when released at point E. a) If the masscord system loses 0.20 J of potential energy as it travels to point C, what velocity would it gain as it is accelerated to point C? b)

Physics
please can u check my answer Here are the questions: 1. A 0.45 kg book is resting on a dessktop 0.64 m high. Calculate the book's potential energy relative to a)the desktop? b)the floor. 2. A 0.636 kg basketball has a potential energy of 19J at the basket.

Physics ~Conservation of Energy~ part 2
1.) A 500 kg roller coaster is pulled to the top of a hill 45 m high and arrives at the top with a zero speed. a) how much work has done by the vhain to pull the car to the top? b) how much potential energy does it have at the top? c)What is the total

Science
A mango on the tree possesses potential energy when falling down potential energy, the potential energy is converted to kinetic energy. what is the value of potential energy at the point of the mango hangs on there.

Physics
A rollercoaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the

physics
A rollercoaster car with a mass of 550 kg starts at rest from a point 46 m above the ground. At point B, it is 23 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? Incorrect: Your answer is

Physics
A 100g toy car is propelled by a compressed spring that starts it moving.The compression of the spring is 18cm. It coasts up the frictionless slope, gaining 0.2 min altitude.The speed of the car at this altitude is 0.5 m/s. Find the spring constant. Would

physics
A small block of mass m can slide along the frictionless loopthe loop. The block is released from rest at point P, at height h =5R above the bottom of the loop. How much work does the gravitational force do on the block as the block travels from point P

physics
A 1.5 kg snowball is fired from a cliff 12.5m high with an inital velocity of 14 m/s directed 41 degrees above the horizontal. a) how much work is done on the snowball by the gravitaitonal force during its flight to the flat ground below the cliff? b) what

Physics
When an 81.6 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.14E+3 J. By how much does the potential energy of a 18.6 kg child increase when the child climbs a normal staircase

Physics ~Conservation of Energy~
1.) At one point in its fall, an object (m=2.5 kg.) has a kinetic energy of 5 J(joule) and a potential energy of 10 J. a) what is the total energy of the system? b) what is the velocity at this point? The object continues to another point where its

Physics
What potential energy does a 60.0kg gymnast acquire in climbing 5.00 m up a vertical pole? GIVEN: mg = 60 h/d = 5.00 m PE = mgh PE = (60)(5.00) PE = 300 J

Physics
A 0.50kg mass is placed on the end of a vertical spring that has a spring constant of 75 N/m and eased down into its equilibrium position. (a) Determine the change in spring (elastic) potential energy of the system. PEs=1/2kx^2=1/2(75)(0.5)^2=9.375 (b)

Physics questions
Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the

physics
Write an expression for a unit vector at 45∘ clockwise from the xaxis. Express your answer in terms of the unit vectors i^ and j^.

physics repost
A 75 kg skydiver dives out of her airplane 3000 m in the air. How much potential energy will she have left 1/4 of the way down? PE=mgh 75(3000)(.25) = 5.5 x 10^5

Physics
Electric potential and electric potential energy are synonyms for the same physical quantity  the potential energy per unit charge. are synonyms for the same physical quantity  the potential energy of a given charge. are two different but related

science
A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor? A. Its potential energy increases, and its kinetic energy decreases. B. Its potential

physics
A block is moving down an incline a distance of 5 m form point A to point B by a force F that is parallel to the incline and has magnitude 2 N. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block increases

physics
Which of the following is true about frictional forces? 1) They are stored as frictional potential energy. 2) They can decrease kinetic energy. 3) They produce heat potential energy. 4) They eventually convert to electromagnetic potential energy. 5) They

Physics
From the expression E = mgh for potential energy, how can I express the unit of energy, the joule, in terms of kilograms, metres and seconds? could anyone explain to me what this question is asking me for cuz I don't understand it, to be honest? thanks

Physics
A 500g ball is dropped into a well that is 10m deep. A)What is the ball's potential energy before it is dropped? Take the bottom of the well to be at zero height. I solved by using PE=mgh and came up with 49J. B) What are the kinetic energy and potential

physics
A 500g ball is dropped into a well that is 10m deep. A)What is the ball's potential energy before it is dropped? Take the bottom of the well to be at zero height. I solved by using PE=mgh and came up with 49J. B) What are the kinetic energy and potential

science
can you help me with a sentence or two  analyze how potential energy is to an objects position and give examples of gravitatinal and elastic potential energy PE  mgh

Physics
Please help me with this!! I am really confused about it... 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board?

Physics
The size of Rutherford's atom is about 0.1 nm. (a) Calculate the attractive electrostatic force between an electron and a proton at that distance. (b) Calculate the electrostatic potential energy of that atom. Express the result in unit eV. (c) The size of

physics
ok i need help on this other question please A 56.0 kg skier is at the top of a slope. At the initial point A, the skier is 14.0 m vertically above the final point B. (a) find the difference in gravitational potential energy associated with the skier at

Physics ~please help me!
1.) A car (m=1200 kg) moves form 2.0 m/s to 15.0 m/s in 100 m. a) What is the initial kinetic energy of the car? b) What is the final kinetic energy of the car? c) what is the net work applied to the car? d) what force is applied to the car? 2.) A simple

PHYSICS  please check my work
a spectator at a hockey game is sitting in a seat situated 10.4m above ground leve. if the spectator has a mass of 52.6 kg, calculate her gravitational potential energy relative to: a)ground level Eg=mgh =52.6X9.8X10.4 =5360.99J b)the ice surface Eg=mgh

physics
Show how Bernoulli’s energy equation for a fluid can be derived by considering how the work done by the fluid moving from point 1 to point 2 is equal to the energy gained or lost by the fluid. You can assume the potential energy PE=mgh and the kinetic

Physics
A 2.0kg rock falls from a height of 25 m to a point 20 m above the ground. How much potential energy does it lose? GIVEN: mg = 2.0 kg h/d = 5 m PE = mgh PE = (2)(5) PE = 10 J

Physics
QUESTION: A 200 N/m, 5 m spring on a 20 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline will the block travel? How fast will it be traveling when it is 0.2 m up the incline? EQUATION:

Physics
QUESTION: A 200 N/m, 5 m spring on a 20 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline will the block travel? How fast will it be traveling when it is 0.2 m up the incline? EQUATION:

PHYSCIS FO SHIZZLE
Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the

Astronomy
For an object of mass m in a circular orbit of radius R under the gravitational influence of a center of mass M, find an expression for the total energy, the sum of kinetic and potential energy (with potential energy at infinite distance set to zero), in

Physics (Please)
I'm confused and am hoping someone could help me understand energy can neither be created nor destroyed... great... so in physics classes we can set up problems and stuff were KEo + PEo = KE + PE Energy intial equals energy final sense energy is conserved

physics
Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the waterEarth system each second? b) If all this energy could be converted to electrical energy (can’t happen)

A physics question
I was researching amusement park rides for a recent project (from this site I have noticed that many others are in the same boat as me). Anywho, I am doing the Ferris wheel or the Giant Wheel, and I was wondering if this was right, with respect to

avgforce*distance=Original energy=mgh
avgforce*distance=Original energy=mgh mgh? m= mass g= 9.8 h = hr?

PHYSICS helppppp
A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of

physics
A 2 kg rock is released from rest at a height of 29 m. Ignore air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights;20m 15m 9m * physics  bobpursley, Wednesday,

Physics
1) A Newton is A A unit of force B) 1kg m/s^2 C) A derived unit D) All of these I think its D, am I correct? 2) A falling raindrop has A) potential energy B) kinetic energy C) Boh A and B D) Neither A or B I think its C, am I correct?

physics
Write an expression for a unit vector at 45∘ clockwise from the xaxis. Express your answer in terms of the unit vectors i^ and j^.

physics
A 75 kg skydiver dives out of her airplane 3000 m in the air. How much potential energy will she have left 1/4 of the way down? PE=mgh 75(3000)(.25) = 5.5 x 10^5

Physics
What is the potential energy of a 3kg ball that is on the ground. do i do mgh? (9.8)(3kg) ?

Physics  drwls?
A small block of mass m = 4.0 kg can slide along the frictionless looptheloop. The block is released from rest at point P, at height h = 23R above the bottom of the loop (R is the radius of the loop). Express your answers in the form ngR, where n is the

physics
please check my answers what are the SI units for momentum? kg*m/s which of the following is not involved in hitting a tennis ball? a. kinetic energy b. chemical potential energy c. gravitational potential energy d. elastic potential energy i picked B How

Science
Wil kinetic energy increase or decrease based on the amount of potential energy it starts with?? If potential energy is lost, KEnergy increases. Potential Energy + kinetic energy= constant.

physics please help me
I am solving a problem and someone tol me to use this formula MgH = (1/2)*k*(H210)^2 + Mg*2 where did this equation come from. Its not in my book. What concepts does it use? Is it solved correctly? MgH = (1/2)*k*(H210)^2 + Mg*2 MgH = 0.5k(H12)^2 + 2Mg

Re: Physics  drwls #2
Posted by winterWX on Monday, March 19, 2007 at 11:54pm. A small block of mass m = 4.0 kg can slide along the frictionless looptheloop. The block is released from rest at point P, at height h = 23R above the bottom of the loop (R is the radius of the

Physics
I need help with b... I found that k=.750880 for part a but I can't figure out what y would be to get potential energy. A 52 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 0.8 * sin( 3.8 * t )

Physics
A 2000kg truck is raised 15 m in an elevator. What is the increase in its potential energy? GIVEN: mg = 2000 kg h = 15 m PE = mgh PE = (2000)(15) PE = 30,000 J

physics, please check work
a 15g bullet is fired at 840 m/s into a penullum consisting of a 24kg bag of sand. If the bag rises to a height of 80cm, how much energy is converted into thermal energy in the bag? Emechanical=Ek + Eg =1/2mv^2 +mgh =1/5(0.015)(840) + 0 =5292J Emechanical

Physics
A 700# rock sits atop a 150 foot cliff. 1) If it is pushed off how much kinetic energy is in the rock just before it hits the ground? 2) How much potential energy does it have just before it hits the ground? On 2 will I use the mgh formula? If so what

physics
The length of a simple pendulum is 0.82 m and the mass of the particle (the "bob") at the end of the cable is 0.69 kg. The pendulum is pulled away from its equilibrium position by an angle of 6.7 ° and released from rest. Assume that friction can be

Physics Classical Mechanics
A body of mass m= 1 kg is moving along the xaxis. Its potential energy is given by the function U(x)=2(x2−1)2 Note: The units were dropped for the numbers in the equation above. You should note that 2 would carry units of J⋅m−4 and 1 would carry

P chem
why does the Shroedinger equation have a specific operator for kinetic energy and only a general expression (V) for potential energy

physical Chem
why does the Shroedinger equation have a specific operator for kinetic energy and only a general expression (V) for potential energy

Science
Which of these correctly describes how a system can store potential energy on the microscopic level?” A. The particles must have position with regards to a reference point if the system stores potential energy B. The particles must be in motion if the

Physics
You drop a 2 kg textbook to a friend who stands on the ground 10m below the testbook with outstreatched hands 1.5m above the ground. a) how much work W_g is done on the textbook by the gravitational force as it drops to your friend's hands? b)What is the

Check my physics
Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic

physics
an object is thrown upward with an initial velocity 'u' m/s. derive an expression for the height 'h' at which its kinetic energy becomes equal to its potential energy.

Physics
Right now in physics we are learning about electric potential energy and electric potential. My question is: P and Q are points within a uniform electric field that are separated by a distance of 0.1 m. The potential difference between P and Q is 50 V. How

Chemistry
Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

Probability
Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten

Physics
A 245 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 35.0 cm, as shown in Figure 521. (a) Calculate the gravitational potential energy at A relative to B. 1 . (b) Calculate the particle's kinetic energy at B. 2

physics
if m is in kg, ag in m/s2, and h in metre, what is the unit of potential energy?

Physics please check
A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.60 m/s at the