It moves faster and rises
It depends on the material.
i dont know try it and see what happens
It becomes hot polluted air.
This happens when the engine is too hot. This increases the flow air over the surface
To help them move over hot surfaces.
If you swim in the water or touch the water, it is a bit warm compared to the air that surrounds you. This usually happens during night in a hot day.
it pops
The air will expand, increasing the volume
All the air inside of it will inflate.
it rises
the hot-air molecules bang on each other harder.
the hot-air molecules bang on each other harder.