Two applications of heat energy

Automobile fuels such as gasoline are sources of heat energy, as is the hot engine of a racecar or a school bus. A toaster is turned on and turns a piece of bread into a piece of toast. This is due to the radiant heat energy of the toast, which draws moisture from the bread and makes it crispy.

Explanation:

don't want to explain, to problem some.

measure their densities same density, same sub

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.