A girl lifts a ball of 2 kg from the ground up vertically a height of 0.5 meters. How much work does she do?

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

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

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes