Question

Heat required to melt $1g$ ice at $0^{o}C$ is $80cal$. A man chews $60g$ of ice and melt it in one minute. His power of chewing is

• A. $480W$
• B. $20160W$
• C. $2016W$
• D. $336W$

Answer 1

Answer: (D)

$336W$

Heat required to melt 60 g of ice = 80*60 cal = 80*60*4.2 J =20160 J

Power = Energy/ time = 20160 J/60 s = 336 W