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In the determination of J buy Joule's ex...

In the determination of `J` buy Joule's experiment, the weights of mass `1kg` each were allowed to fall through `1m`. When the fell 80 times the temperature of the water in the calorimeter increased by `3^(@)C`. Calculate `J` if the time taken for each fall was 1 second and the water equivalent of the calorimeter and its contents `100xx10^(-3)` kg. Sp. heat capacity of water `=1000 cal kg^(-1)K^(-1)`.

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