Question

Radiator in automobiles works on the principle of
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Answer 1

Answer:

When the coolant reaches to the radiator, it circulates through a series of pipes in the radiator. The surrounding air absorbs the heat from the coolant circulating in the radiator pipes and brings the heated coolant back to the normal temperature.

Explanation:

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Answer 2

Answer:

The air picks up heat from the coolant by convection process, i.e. heated air is blown away by the fan, and colder air replaces it.