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.

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.
A.	34.4
B.	40.5
C.	25
D.	26.8
Answer» B. 40.5