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Physics, 06.05.2020 05:44 leilaford2003
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 g. If the entire mechanical work is used up in producing heat and the rate of rise in temperature of the block and the drill is 0.5 °C/sec. Find (a) the rate of working of the drill in Watts and (b) torque required to drive the drill. Given: specific heat capacity of steel = 420 J/(kgK)
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A steel drill making 180 rpm is used to drill a hole in a block of steel. The mass of the steel bloc...
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