question_answer

An electric drill of output 0.2 hp is used to drill a hole in 100 g of iron. It takes 20 s to drill the hole. Assuming that all the energy spent is absorbed by the iron, its rise in temperature is _____\[{}^\circ C\]. (Given specific heat of iron \[=450J\,k{{g}^{-1}}{{\,}^{o}}{{C}^{-1}}\]).

Answer:

66.7