Physics for IGCSE & O level - Thermal Effects (Section 2 - No. 48)
How does convection work in a room with a radiator?
Warm air rises, and cool air sinks.
Cool air rises, and warm air sinks.
Air moves in a circular motion.
The radiator emits heat and cools air.
Giải thích
Warm air is less dense and rises, and cooler air sinks creating a current.