500 g of hot water at 60oC is kept in the open till its temperature falls to 40oC. Calculate the heat energy lost to the surroundings by the water. (Specific heat of water =4200Jkg−1oC−1)
2400 J
5000 J
40000 J
42000 J
A
40000 J
B
5000 J
C
42000 J
D
2400 J
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