Write any two applications of convection currents in air.....
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1. air-conditioner
-Convection in with an air conditioner is similar to that of the refrigerator.
The air intake is located up high so that only warm air enters the unit.
After cooling, the cold air expelled from the outlet vent sinks to the floor while the warmer air rise towards the air intake.
2. Household hot water system
The operation of a hot water system for a house is based on the principle of convection.
The system consists of a boiler, a water storage tank and a cold tank inter-connected by pipes arranged as shown in the figure.
Convection currents rise the hot water up from the boiler to the storage tank while cold water flows down to the boiler, where it in turn becomes heated.
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- The air we breath out is warmer and lighter
- A radiator puts warm air out of the top and draws air at the bottom
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