How does a bicycle rider's energy of motion changes as the gain speed while riding down a hill?
options:
a) it is lost.
b) it increases.
c) it remains the same.
d) it is stored in the bicycle rider.

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?