A) 80000 cal
B) 63000 cal
C) 1050 cal
D) 15000 cal
Correct Answer: D
Solution :
\[H=\frac{{{V}^{2}}t}{R\times J}\,Calories=\frac{P\,t}{J}=\frac{210\times 5\times 60}{4.2}=15000\,cal\]
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