This question is easy to answer. When air is heated since the molecules move more rapidly they expand and become less dense. Since the hot air becomes less dense then the surrounding cool air, the hot air experiences a net buoyant force just like how a non-dense object rises in water. With this buoyant force the air rises. This is how air balloons work. Since the air inside is hot, it rises, pulling the entire balloon up. So, the reason why hot air rises is the same reason why ships don’t sink!
top of page
bottom of page
Comments