In an experiment using the Searle's friction cone method the haing mas, which was 250xx10^(-3)kg remained stationary when the wheel was rotated at the rate of 1//2 revolution per second. It was found that the temperature of water in the cones increased by 3^(@)C in 27 minutes. The total water equivalent of the cones and water taken was 150. Diameter of wooden disc =30cm, sp. heat capacity of water =100calkg^(-1)K^(-1). Calculate J.

In an experiment using the Searle's friction cone method the haing mas

1.	In an experiment using the Searle's friction cone method the haing mas, which was 250xx10^(-3)kg remained stationary when the wheel was rotated at the rate of 1//2 revolution per second. It was found that the temperature of water in the cones increased by 3^(@)C in 27 minutes. The total water equivalent of the cones and water taken was 150. Diameter of wooden disc =30cm, sp. heat capacity of water =100calkg^(-1)K^(-1). Calculate J.
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