A 10 KW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. How much is the rise of temperature in 2.5 minutes assuming 50% of the power is used up in heating the machine itself and remaining is lost to the surroundings. (specific heat of aluminium is 0.9Jgm^(-1)K^(-1))

A 10 KW drilling machine is used to drill a bore in a small aluminium

1.	A 10 KW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. How much is the rise of temperature in 2.5 minutes assuming 50% of the power is used up in heating the machine itself and remaining is lost to the surroundings. (specific heat of aluminium is 0.9Jgm^(-1)K^(-1))
Answer» `92^@`C `103^@`C `77^@`C `122^@`C Answer :B