PH-2144
Convection
Physics · Secondary 4 · Medium · Convection
In most refrigerators, the freezing compartment is located at the top. How does this help to keep the whole fridge cool?
- Cold, denser air sinks from the top and warmer air rises to be cooled, forming a convection current
- Cold, less dense air rises from the top and pushes warm air downwards
- Heat is removed only by radiation, so the freezer must face the fridge door
- Conduction through the fridge walls is the main way the food is cooled
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