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Question

Water is used to cool radiators of engines,  because _______


  1. Of its lower density

  2. It is easily available

  3. It is cheap

  4. It has high specific heat


Solution

The correct option is D

It has high specific heat


Due to the large specific heat of water, it releases large heat with very small temperature change. It takes a tremendous amount of energy to change the temperature of water, giving it enormous cooling capacity compared to most metals (rapidly absorbing heat energy from the engine).

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