A `10 kW` drilling machine is used to drill a bore in a small aluminium block of mass `8.0 kg`. How
Channel: Doubtnut
Date: 2020-01-19

A `10 kW` drilling machine is used to drill a bore in a small aluminium block of mass `8.0 kg`. How much is the rise in temperature of the block in `2.5` minutes, assuming `50%` of power is used up in heating the machine itself or lost to the surrounding? Specific heat of aluminium `= 0.91 J//g^(@)C`.