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If a 600 kg car is moving with a speed of 25 m/s, that what is its kinetic energy? State your answer in Joules. What is its momentum? What are the correct units of measurement for momentum?
a space station is a hollow cylinder of radius of 440m, that rotates to stimulate gravity by its centripetal acceleration. find the period of the rotation in seconds
A sports car travling at 24.7 m/s slows at a constant rate to stop in 16.00 s . what is the average acceleration of the sports car in this time interval?
on an ice rink a 3 kg object initially moving a speed of 5 ms strikes a 6 kg object initially at rest. afterwards the
A block of mass 4.0 kg is attached to a string and the string is attached to a spring(k=32.0N/m). What is the maximum extension of the spring
a coal-fired electric power plant has a 2000-megawatt electric power output and operates with an overall plant
An electron moves in the positive x-direction a distance of 2.31 m in 2.85·10-8 s, bounces off a moving proton, What is the average speed of the electron
How fast will the electron be moving. What was his average speed (in m/s) for the race.
A skateboarder shoots off a ramp with a velocity of 6.9 m/s, directed at an angle of 56 ° above the horizontal. The end of the ramp is 1.1 m above the ground. how far is this point horizontally from the end of the ramp
An elderly sailor is shipwrecked on a desert island but manages to save his eyeglasses. How far apart are the lenses when the telescope is adjusted for minimum eyestrain
A crane lifts a 425kg steel beam vertically upward a distance of 117m. How much work does the crane do on the beam if the beam accelerates upward at 1.8 m/s^2 Neglect frictional forces
A sample contains 3.5Ã-1019 radioactive atoms with a half life of 10000 years. How many atoms are expected to decay in the first second
Explain how the earth’s geomagnetic field is created? Hint: be sure to include thedirection of the earth’s current. Why is Northern Canadabombarded by more intensecosmic radiation (solar wind) than Mexico is? Why do astronauts keep to altitudesbeneat..
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