In which of these situations is convection most likely the main form of heat transfer?
Warm air from a heater on the first floor of a house moves to the upper floors.
The sides of a metal pan become hot when the pan is placed on a stove burner.
A person gets a sunburn from lying on the beach too long.
An ice cube melts when a person holds it in his hand.
The reaction of trinitrotoluene with oxygen releases heat and light.