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A calorimeter of water equivalent 10 g c...

A calorimeter of water equivalent 10 g contains 100 g of water at `90^(@)C`. On exposure to air, its temperature falls to `80^(@)C` in 5 min. If the same calorimeter is filled with 50 g of an oil, the time for the same drop in temperature is 2 min. Calculate the specific heat of the oil if the rate of heat loss in both the cases is assumed to be the same.

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`"0.68 cal.g"^(-1).^(@)C^(-1)`
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