If you drop your keys, their momentum increases as they fall. Is the momentum of the keys conserved, or does the momentum of the universe increase as the keys fall? Explain.

The metric unit of electrical power is the watt volt ampere ohm

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.