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 surroundings ? Specific heat of aluminium 0.91 J g ^(-1) ""^(@)C ^(-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 8.0 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 surroundings ? Specific heat of aluminium 0.91 J g ^(-1) ""^(@)C ^(-1).
Answer» SOLUTION :`50% of 10 xx 10^(3) xx 2.5 xx 60 = ` MCDT `= 8 xx 0.91 xx 10 ^(3) xx dT = 103.02K`