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use the ke and gpe equations to solve for speed or height depending on the situation.

a 1,000-kg car has 50,000 joules of kinetic energy. what is its speed?
( show work)

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

What can you increase the strength of an electromagnet by

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g