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