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A 10 kW drilling machine is used to dril...

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).`

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To solve the problem, we will follow these steps: ### Step 1: Calculate the effective power used for heating the aluminum block. Given that the total power of the drilling machine is 10 kW and 50% of this power is used for heating the machine itself or lost to the surroundings, we can calculate the effective power used for heating the aluminum block. \[ \text{Effective Power} = \text{Total Power} \times \text{Efficiency} \] ...
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