Convection in air happens when _____ air rises up and the ____ air from surrounding areas rushes to fill in its place.
Sea and land breezes(a) are caused by currents set up in air due to conduction.(b) are caused by currents set up in air due to convection(c) are caused by currents set up in air due to radiation(d) have no relation to conduction, convection or radiation
When hot air rises up from a region, the region becomes:
What happens to the shape of a tin can filled with hot air when it is kept in a refrigerator?