In Joule's experiment, an insulated container contains 20 kg of water initially at 25¬∞C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms-2. Neglecting the heat capacity of agitator, the temperature of water (in ¬∞C) is

In Joule's experiment, an insulated container contains 20 kg of water

1.	In Joule's experiment, an insulated container contains 20 kg of water initially at 25¬∞C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms-2. Neglecting the heat capacity of agitator, the temperature of water (in ¬∞C) is
A.	40.5
B.	34.4
C.	26.8
D.	25
Answer» C. 26.8

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