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`.

A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. Find the rise in temperature of the block in 2.5 minutes, assuming 50% power is used up in heating the machine itself or lost to the surropundings. (Specific heat of aluminium = 0.91 J g^(-1).^(@)C^(-1) )

A 10kw drilling machine is used for 5 minutes to bore a hole in an aluminium block of mass 10xx10^(3)kg . If 40% of the work done is utilised to raise the temperature of the block, then find the raise in temperature of the aluminium block? (Specific heat of Aluminium =0.9 Jkg^(-1)k^(-1) )

A drilling machine of power P watts is used to drill a hole in copper block of mass M kg. If the spcific heat of coper is sjkg^(-1) .^(@)C^(-1) and 40% of the powder is lost due to theating of the machine, the rise in the temperature of the block in T seconds will be (in .^(@)C )

A 100 g cube of aluminium is removed from a bath of boiling water and dropped in a bath of room temperature water (2.00 litres at 20.0^(@)C ). What is the final temperature of the water assuming heat loss to the surroundings is negligible? The specific heat capacity of aluminium is 897 J/kg .^(@)C .

A lead bullet strikes a target with a velocity of 500 ms^(-1) and the bullet falls dead. Calculate the rise in temperature of the bullet assuming that 40% of the heat produced is used in heating the bullet. Given specific heat of lead = 0.03 cal g^(-1).^(@)C^(-1), J = 4.2 J cal^(-1) .

A steel drill making 180 rpm is used to drill a hole in a block of steel. The mass of the steel block and the drill is 180 gm. If the entire mechanical work is used up in producing heat and the rate of raise in temperature of the block and the drill is 0.5 °C/s. Find (a) the rate of working of the drill in watts, and (b) the torque required to drive the drill. Specific heat of steel = 0.1 and J = 4.2 J//cal . Use : P = tau omega

Calculate the amount of heat required to raise the temperature of 13.5 g aluminium from 300 K to 400 K, if specific heat of aluminium is 0.9 J (.^(@)C)^(-1) g^(-1) .