Which of the following has the ability to turn light energy into chemical energy? A. an automobile B. a tree C. a book D. a generator

The transfer of heat by direct contact is called?

What are the Units of resistance?

An earthquake that causes a landslide under the ocean floor can trigger a

Light waves A) Do not require a medium B) can not travel through a vacuum C) are not electromagnetic radiation D) do not travel in straight lines from the source

The force that accelerates a rocket into outer space is exerted on the rocket by A. the exhaust gases. B. Earth's gravity. C. atmospheric pressure. D. rocket's wings. E. none of the above

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?