The force of gravity on you is greatest when you are standing
a. far above earth's surface
b. just above earth's surface
c. on earth's surface

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional