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May 2, 2016

Search: If the linear speed of the disk is 1.35 m/s, find the translational kinetic energy, rotational kinetic energy, and the total kinetic energy of the rolling hoop.

Number of results: 118,592

Physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016 by tom

Physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016 by tom

physics
Consider the hip joint. The bones are normally not in direct contact , but instead are covered with cartilage to reduce friction. The space between them is filled with synovial fluid, which reduces the friction further. Due to this fluid, the coefficient of kinetic friction ...
March 8, 2016 by vanessa

chemistry-check answer
Suppose you have a 10 watt fluorescent light bulb. If this light bulb is 6 % efficient in turning electricity into light, then how many photons are being emitted per second? Assume that average energy of all the photons emitted is 550 nm, thus you can treat all the photons as ...
October 31, 2010 by Jazmin

physics
Rubber tires and wet blacktop have a coefficient of kinetic friction of 0.5. A pickup truck with a mass 750 kg traveling 30.0 m/s skids to a stop. (a) what is the size and direction of the frictional force that the road exerts on the truck? (b) Find the acceleration of the ...
November 11, 2014 by bill

PHYSICS.
5. A motor lifts a 12 kg mass to a height of 15 m at a constant velocity in 3.5 s. a) Find the power b) If the motor is only 35% efficient find the input energy.
June 17, 2014 by Unknown

physics
A 220 N crate is pushed along the ground with a horizontal force. The coefficient of kinetic friction is 0.21 and the coefficient of static friction is 0.31. The crate moves at a constant speed of 4.1 m/s. a) Draw a free-body diagram for the crate. b) What is the size of the ...
November 15, 2011 by Kelsey

Physics
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.60, what was the speed of the bullet ...
January 5, 2012 by Nicole

Physics
A stuntman is being pulled along a rough road at a constant velocity by a cable attached to a moving truck. The cable is parallel to the ground. The mass of the stuntman is 110 kg, and the coefficient of kinetic friction between the road and him is 0.825. Find the tension in ...
March 20, 2013 by Kelly

physics
A block of mass 2.5 kg is pushed up against the vertical wall by a force of 60 N acting at 47◦ to the ceiling. The coefficient of kinetic friction between the block and the wall is 0.67. The acceleration of gravity is 9.8 m/s2 . Find the work done by this force in moving...
June 27, 2014 by Kaylee

physics
Starting from rest, a crate of mass m is pushed up a frictionless slope of angle (theta) by a horizontal force of magnitude F. Use work and energy to find an expression for the crate's speed v when it is at height h above the bottom of the slope. Express your answer in terms ...
November 10, 2012 by Ohimai

Physics
Can't figure this one out. "In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.88 m by the horizontal 25 N force from the broom and ...
February 20, 2011 by Mark

physics
A 2 kg mass falls 40 m and buries itself into the ground 0.40 m. Find: a) How much work was done by gravity, b) How much potential energy was lost, and c) What was its speed when it hit the ground, and d) the average force causing the mass to stop once it hit the ground.
November 28, 2012 by Ted

physics
A box of mass 52 kg starts from rest to slide down a ramp that makes an angle of 16.6 degrees with respect to the horizontal. 4.1 seconds later, it has covered a distance of 3.98 meters. What is the coefficient of kinetic friction?
February 22, 2014 by Tammie

physics
A box of mass 50 kg starts from rest to slide down a ramp that makes an angle of 10.7 degrees with respect to the horizontal. 6.3 seconds later, it has covered a distance of 3.39 meters. What is the coefficient of kinetic friction?
September 30, 2015 by Caroline

Physics
A toboggan approaches a snowy hill moving at 11.1 m/s . The coefficients of static and kinetic friction between the snow and the toboggan are 0.410 and 0.280, respectively, and the hill slopes upward at 42.0 ∘ above the horizontal. A)Find the acceleration of the toboggan...
February 14, 2016 by Samantha

Physics (simple electronics)
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 775 F capacitor is 330 V. (a) Determine the energy that is used to produce the flash in this ...
February 24, 2011 by Mike

Physics
A 3.0 kg block is being pulled with a horizontal force of 29.7 N. If the block is accelerating at 3.2 m/s/s, what is the coefficient of kinetic friction between the block and the table?
November 2, 2010 by keith

physics
1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect) 2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength
February 12, 2009 by jaden

physics
With what minimum speed must you toss a 160 ball straight up to hit the 15 -high roof of the gymnasium if you release the ball 1.7 above the ground? Solve this problem using energy.
October 12, 2009 by Dan

ha
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 10ȳ joule seconds, the speed of light is 2.998 10 m/s)
October 11, 2013 by gg

physics
A man skis down from the top of a hill 1500.0 m high, starting from rest. If he loses 50% of his initial mechanical energy to friction during his descent, what is his speed in m/s at the base of the hill?
November 5, 2014 by fun

Physics
A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are: a.) the period of the motion b.) the maximum speed of the particle c.) total mechanical energy of the oscillator...
November 30, 2010 by Greg

physics
need help with the following question. if earth has a mass of 6.0*10^24 kg and a radius 6.4*10^6 m: a) find the change in gravitational potential energy of a meteorite of mass 150 kg as it moves from an infinite distance to the earth's surface. b) with what speed does the ...
September 24, 2011 by rachel

science
Distinguish between high-energy and low-energy You have to put this in context. We dont do homework for you, but will be happy to critique your thinking. You have to put this in context. We dont do homework for you, but will be happy to critique your thinking.
July 6, 2007 by al

Physics
Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of a horizontal table ...
March 6, 2013 by Heidi

physics
A winch is used to frag a 375 N crate up a ramp at a constant speed of 0.75 m/s by means of a rope that pulls parallel to surface of the ramp. The rope slopes at 33 deg. above the horizontal, and the coefficient of kinetic friction between the ramp and the crate is 0.25. (a) ...
October 24, 2011 by juniper

HELPPP
I printed out a summer activite to test my skill on science and i found some that i stumbled upon and couldnt figuire out so help? If im wrong then please correct me. 2.A 3.B 4.B 5.A 6.B 2.Giraffes have long necks that allow them to eat leaves in trees. What is this an example...
August 5, 2014 by Matt

physics
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 7.0 m/s. The coefficient of kinetic friction between the sleds runners and the hard, icy snow is 0.054, and the girl and sled together weigh 749 N. The acceleration of gravity is 9....
January 26, 2014 by Anonymous

physics
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 7.0 m/s. The coefficient of kinetic friction between the sleds runners and the hard, icy snow is 0.054, and the girl and sled together weigh 749 N. The acceleration of gravity is 9....
January 26, 2014 by christopher

physics
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 6.6 m/s. The coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.047, and the girl and sled together weigh 755 N. The acceleration of gravity is 9.81 m/s...
November 1, 2015 by luma

Physics
Suppose I have a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, I have an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are ...
October 29, 2010 by Mark

physics
Suppose I have a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, I have an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are ...
October 29, 2010 by Mark

physics
A 265g mass attached to a horizontal spring oscillates at a frequency of 1.00Hz . At t =0s, the mass is at x= 4.20cm and has vx = − 1*.0cm/s. Determine the position at t= 3.60s. So I already found that... The period is 1.0000 s The angular frequency is 6.2832 rad/s The ...
December 6, 2014 by Ciara

physics
for a free throw in basketball,find an equation for the final angle to go into the hoop in terms of y and x to the hoop and the initial angle. I can't seem to get an equation with only those variables. I always get stuck with others like time and velocity. how do i do this?
February 3, 2008 by Mischa

IPC
okayy sooo this matching thing is wierd.. i dont understand it.. Zeroth First Second -Heat can change energy from one form to another, but the amount of energy in the universe is constant. -Two objects in thermal equilibruim will have no net heat flow between them. -The ...
May 3, 2011 by Please help!!

Physics
A man drags a 180 lb crate across a floor by pulling on a rope inclined at 20.0 degrees with the horizontal. If the coefficient of static friction is 0.560 , and the coefficient of kinetic friction is 0.350, find the acceleration (in feet/second^2) of the crate at the instant ...
October 9, 2014 by Bryce

Chemistry-Dr.Bob
An unknown piece of metal weighing 100. g is heated to 90.0 degrees Celcius. It is dropped into 250 g of water at 20.0 degrees Celcius. When equilibrium is reached, the temperature of both the water and piece of metal is 29.0 degrees Celcius. Determine the specific heat of the...
January 9, 2016 by Sanaya

physics
a 20 N force pulls a 5kg box at a 60 degree angle above horizontal along the floor. If the Kinetic friction between contact surfaces is 2N. what is the acceleration of the box?
November 3, 2010 by Meme

physics
a 20 N force pulls a 5kg box at a 60 degree angle above horizontal along the floor. If the Kinetic friction between contact surfaces is 2N. what is the acceleration of the box?
November 3, 2010 by Meme

physics
A 290 kg piano slides 4.0 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40
March 21, 2011 by md8

chemistry
The following is kinetic rate data taken as absorbance of reactant vs. time: A: ln(A): Time/min: 0.532 ?? 0.0 0.484 2.54 0.442 5.12 0.395 8.35 0.350 11.95 fill in the ln(A) column
September 24, 2012 by Brunette

Physics
A 61 - kg ice skater coasts with no effort for 61 m until she stops. If the coefficient of kinetic friction between her skates and the ice is μk=0.10, how fast was she moving at the start of her coast?
October 6, 2015 by Angel

Physics
In a tape recorder, the magnetic tape moves at a constant linear speed of 5.6 cm/s. To maintain this constant linear speed, the angular speed of the driving spool (the take-up spool) has to change accordingly. (a) What is the angular speed of the take-up spool when it is empty...
October 21, 2011 by mymi

introductory technology
Question 1 1) state five operation that a vice can carry out 2)state the energy input and energy output of the following appliances a)electric iron b)electric kettle c)gas lamp d)ceiling fan e)radio set Question 2 1)list two common methods of cutting screw 2) the common things...
January 2, 2010 by jolomi skinn

chemistry
the following values are the only energy levels of a hypothetical one electron atom: E6= -2x10^-19J, E4= -11x10^-19J, E2= -17x10^-19J, E5= -7x10^-19L, E3= -15x10^-19J, E1= -20x10^-1J a: if the electon were in the n = 3 level, what would be the highest frequency and minimum ...
April 5, 2014 by hotmom

Physics--Please Help!!
A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box with a speed of 75 m/s...
October 28, 2012 by Rob

chemistry
Can someone help me with this homework problem? Which of the following is the best explanation as to why lithium is the strongest reducing agent in the alkali metals? A) relatively high charge density of Li B) lowest ionization energy of the metals C) most positive standard ...
April 21, 2007 by ninjaturtle

Physics
The tracks of Angel's flight extend 96.0 m along the side of a hill at an angle of 18.4 degrees with respect to the horizontal. If each car has a passenger with a mass of 70.0 kg, what is the total mechanical energy associated with the two passengers when the cars are about to...
October 24, 2009 by lalaglaze

Biology
'We are currently in an energy crisis. After food, fossil fuels are humanity's most important source of energy. These resources take millions of years to make. We are currently using the fuels that were made more than 300 million years ago, before the time of dinosaurs. Fossil...
March 15, 2010 by mysterychicken

science(check answers)
please check my answers 1. B 2. A 3. D 4. A 1.B 2.A 3.D 4.A 1.All renewable resources are inexhaustible A.true B.false 2.Some fuels,called biofuels,are made from plants.They are used in cars and other machines biofuels would fit best in which of the following categories A. ...
March 11, 2014 by matt

science(check answers)
please check my answers 1. B 2. A 3. D 4. A 1.B 2.A 3.D 4.A 1.All renewable resources are inexhaustible A.true B.false 2.Some fuels,called biofuels,are made from plants.They are used in cars and other machines biofuels would fit best in which of the following categories A. ...
March 11, 2014 by matt

Physics
A block of mass 2.00kg starts at rest at the top of a ramp that is inclined delta= 40.0 degrees with the horizontal. The block slides down the ramp a distance of 3.60 meters where it contacts a relaxed spring with K=300N/m. If the coefficient of kinetic friction between the ...
October 19, 2011 by Daniel

chem
The activation energy of a certain reaction is 65.7 kJ/mol. How many times faster will the reaction occur at 51C than at 8C? State the assumptions you need to make in order to perform this calculation. (Select all that apply.) The collision model and the Arrhenius equation ...
February 10, 2013 by Hannah

Chemistry
A carbon atom is bombarded by high energy photons with a wavelength of 40 nm. Find how many electrons are ejected and the velocity of the first electron.
November 11, 2012 by Phillip

physics
Find the pottential energy of a boy of mass 10kg standing on a building floor 10 meters above the ground level p.e?
February 3, 2014 by Salisu

Chemistry
3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) standard enthalpy: -133.5 Find the change in internal energy for this reaction. Enter in kJ.
October 21, 2014 by Rachel

Chemistry
HAve to find a formula to work out the energy required to thermally decompose water into hydrogen and oxygen.
January 12, 2015 by Big

physic
Craig launches the basketball at an angle of 65.0 degrees above the horizontal from a height of 2.00m above the floor.He imparts a speed of 9.70 m/s to the ball and leaves his hand a horizontal distance of 7.25 m from the center of the hoop if the hoop is 3.05 m above the ...
February 5, 2013 by juliet edmund

Physics
A 79.5 kg snowboarder heads down a 28.0 hill that has a height of 62.8 m. If the hill is assumed to be frictionless and there is horizontal wind with a force of 98 N acting against the snowboarder, find the speed of the snowboarder as they reach the bottom of the hill using ...
November 23, 2015 by Anonymous

gen chem
suppose a compound could point in any of the three directions in the solid and still have the same energy. how many molecules would there be if the total entropy of a solid sample of this compound was 3.48x10^-9 j/k
May 9, 2010 by chemistry

Physics
A block on a spring moves in SHM with amplitude 0.23 m and period 3.8 s. The mass of the block is 2.1 kg. What is the total energy of the system? Can someone please take me step by step and show me what my answer should be? Thanks!
June 24, 2012 by Kate

science
Explain the flow of energy through the ecosystem using specific plant and animal examples. Correctly use the following terms in your example and explanation; primary producer, primary consumer, secondary consumer, tertiary consumer, trophic level. Explain which trophic ...
January 19, 2010 by Barb

physics
A torque of 12 N ∙ m is applied to a solid, uniform disk of radius If the disk accelerates at what is the mass of the disk?
October 16, 2014 by Anonymous

physics- please check
a. Two sticks are rubbed together to start a fire. b. A firecracker explodes. c. A red-hot iron bar is set aside to cool. In which of the situations listed above is energy being transferred as heat to the system in order for the system to do work? I would say A & B. In which ...
February 4, 2007 by Anonymous

physics
A curcial part of a piece of machinery starts as a flat uniform cylindrical disk of radius R0 and mass M. It then has a circular hole of radius R1 drilled into it. The hole's center is a distance h from the center of the disk. Find the moment of inertia of this disk (with off-...
April 12, 2008 by Sleepless

College Physics
A point on a rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s^2. What is the angular speed of a point 0.075 m from the center of the disk?
June 8, 2010 by Katie

physcis
A 100.0 kg base runner begins his slide into second base when he is moving at a speed of 4.70 m/s. The coefficient of friction between his clothes and Earth is 0.550. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to...
October 10, 2012 by Anonymous

Physics
Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find the mass of the crate.
March 20, 2011 by Brittney

Physics Mehanics
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. (Hint: Consider the stick to be a thin rod and use the conservation of energy ...
February 24, 2011 by D

chemistry -------------chemistry
If a flame on the candle burns red , how does energy of that flame compare to that of the Bunsen burner flame ? and why ? ans:The Bunsen burner flame has higher temperature than candles flame . Because flame of candle emit red ,and red has the least energy in visible light.
October 11, 2012 by Maria

SCience
An RC-circuit has a time constant of 6x10-3 seconds. The capacitor stores a maximum energy of 8 J, when charged using a 3-Volt battery. Using the same battery, we want to increase tenfold the amount of stored energy, while keeping the same time constant (to ensure that the ...
March 10, 2010 by Mike

statistics
according to the energy information administration (officially energy statics from the US Government) the mean price for one gallon of unleaded regular gas in the US cities for the year 2007 was 2.80 A random sample of 30 pumps in georgia yielded and average price of 284 per ...
December 6, 2011 by jen

physics
An object has a gravitational potential energy of 24 joules when it rests on a shelf 3 m above the ground. What would be its gravitational potential energy when it is lowered to a shelf 1 m above the ground? o A. 8 joules o B. 12 joules o C. 22 joules o D. 72 joules
October 22, 2009 by roxy

Biology
In recent years phytoplankton have been investigated as a potential source of energy for humans. Researchers have therefore been interested in whether these organisms could be farmed to provide food or fuel. In terms of biomass, Gross Primary Production (GPP) in ...
February 25, 2011 by Anonymous student

Energy question
Your friend comes across a good deal to purchase a gold ring. She asks you for advice for you to test the ring. The ring has a mass of 4.54 g. When you heat the ring with 94.8 J of energy, its temperature rises from 23.0 degrees celsius to 47.5 degrees celsius. Would you ...
April 12, 2014 by Liz

Physics
A tank with a constant volume of 3.44 m3 contains 14 moles of a monatomic ideal gas. The gas is initially at a temperature of 300 K. An electric heater is used to transfer 52600 J of energy into the gas. It may help you to recall that CVCV = 12.47 J/K/mole for a monatomic ...
February 9, 2016 by Leul

physics
A 23.1 kg block is dragged over a rough, horizontal surface by a constant force of 95.0 N acting at an angle of angle 29.3 above the horizontal. The block is displaced 5.50 m, and the coefficient of kinetic friction is 0.341. Find the magnitude of the work done by the normal...
September 15, 2011 by Elisabeth

Physics
A 51.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.710 and 0.440, respectively. (a) What horizontal pushing force is required to just start the crate moving? N (b) What horizontal pushing force is required to slide ...
September 17, 2007 by NHS

physics
2.A ball rolls off a shelf with a horizontal velocity of v. At what horizontal distance from the shelf does the ball land if the height of the shelf is h above the floor? 3. A car travels around a circle with a diameter of 500 m at a constant speed of 25 m/s. The static ...
May 24, 2010 by ray

physics
A 4.30 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 43.0 N. The figure gives the block's speed v versus time t as the block moves along an x axis on the floor. The scale of the figure's vertical axis is set by vs = 5.30...
September 9, 2015 by rochelle

Physics
For the situation: "A moving crate slides to a halt on a rough surface" Does temperature increase, decrease, or not change? Are work and heat positive, negative, or zero? Does thermal energy increase, decrease, or not change? My answer key says temperature increases, work is ...
November 16, 2014 by Courtney

Chemistry
25.9 kJ + 1/2 H2 + 1/2 I2 -> HI B) how much energy is needed for the reaction of 4.57E24 molecules of iodine, I2, with excess hydrogen, H2? How does the "excess" hydrogen come into play? I mean, what's the significance of having excess H2 and how do I figure out the answer ...
February 6, 2013 by A Canadian

Physics
a motor lifts a 12 kg mass to a height of 15 meters at a content velocity in 3.5 seconds. a) find the power b) if the motor is only 35% efficient find the input energy
June 16, 2014 by Unknown

physics
Suppose I have a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, I have an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are ...
November 1, 2010 by Mark

math
Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^-^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice or warte, placed on ...
December 5, 2008 by carl

physics please help
On the surface of a planet an object is thrown vertically upward with an initial speed of 60 m/s. use a conservation of energy approach to determine the object's speed when the object is at a quarter of it's maximum height. (assume the planet has no atmosphere) PLEASE HELP. I ...
November 23, 2014 by Isabelle

physics
In an arcade game a 0.142 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releasing it. If the spring has a spring constant of 174 N/m and is compressed from its equilibrium position by 8 cm, find the speed with which the disk ...
December 25, 2011 by rm

physics
In an arcade game a 0.099 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releasing it.If the spring has a spring constant of 244 N/m and is compressed from its equilibrium position by 4 cm, find the speed with which the disk ...
March 18, 2013 by Anonymous

Physics/mats
Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of a horizontal table ...
March 7, 2013 by HP

physics
a block(500N) is being pulled along a surface having coefficients of kinetic and staic friction of 0.45 and 0.5 respectively..draw a free body diagram of the block and find the minimum force that can be applied to the block at an angle 15X below the surface to keep the block ...
December 5, 2011 by Anonymous

physics
A flight attendant pulls her 66 N flight bag a distance of 318 m along a level airport floor at a constant velocity. The force she exerts is 43 N at an angle of 52 above the horizontal. (a) Find the work she does on the flight bag. (b) Find the work done by the force of ...
January 26, 2013 by Brianna Smith

Chemistry
A bullet weighing 235 grains is moving at a speed of 2.52 X 10^3 ft/s. Calculate the kinetcic energy of the bullet in joules ahd in calories. One grain equals 0.0648 g. Can someone help me out on this please
October 28, 2007 by Lauren

physics
how many kilometers per liter will a car obtain if its engine is 25% efficient and it encounters an average retarding force of 500N at highway speed? assume that the energy content of gasoline is 40Mj/liter
December 21, 2009 by john

Physics. PLEASE HELP!!
A 22 kg girl slides down a playground slide that is 3.6 m high. When she reaches the bottom of the slide, her speed is 1.7 m/s. The acceleration of gravity is 9.81 m/s2. How much energy was dissipated by fric-tion? Answer in units of J
March 30, 2012 by Ashley

physics
a 1.00 kg pendulum bob is released from a height of .200m. its speed at the bottom of its swing is 1.95m/s on the first pass. how much energy is lost due to friction during one complete swing?
February 6, 2013 by Anonymous

science
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 10ȳ joule seconds, the speed of light is 2.998 10 m/s)
April 18, 2013 by Anonymous

chemistry
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 10ȳ joule seconds, the speed of light is 2.998 10 m/s)
June 12, 2013 by Anonymous

Chemistry
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 10-34 joule seconds, the speed of light is 2.998 108 m/s)
April 19, 2015 by Ella

chem
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 10ȳ joule seconds, the speed of light is 2.998 10 m/s)
April 22, 2015 by ali

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