Question

Energy can best be described as

a. the substance that makes up objects.

b. the inherent ability of a region of space and the matter within it to do work.

c. the amount of matter in an object.

d. the change in frequency that happens when a wave source moves.

Answer 1

Answer: A

Explanation: In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.