alleryStart learning →How is energy defined?
AThe capacity to supply heat or do work
BThe total mass held by a moving object
CThe force needed to move a fixed mass
DThe rate at which a hot body cools down
Answer & Solution
Correct answer: A. The capacity to supply heat or do work
1. Energy is the capacity to supply heat or to do work.
2. Work here means causing matter to move against an opposing force.
3. Inflating a bicycle tyre is work, since air is pushed against the air already inside.
4. Mass and force are separate quantities and neither defines energy.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 5 "Thermochemistry", section 5.1 Energy Basics_
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