A) 4800 W
B) 336 W
C) 1.33 W
D) 0.75 W
Correct Answer: B
Solution :
\[W=JQ=J\left( mL \right)\] \[\Rightarrow \,\,P\,\,\times \,\,t=J(mL)\Rightarrow \,\,P\,\,=\,\,J\left( \frac{m}{t} \right)\,L;\] where \[\frac{m}{t\,\,}\,\,=\,\,\] rate of melting of ice by chewing \[=\,\,\frac{60\,g}{\min }\,\,=\,\,\frac{1\,g}{\sec }\,\,\Rightarrow \,\,P=4.2\times 1\times 80\,\,=\,\,336\,W\]You need to login to perform this action.
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