Q 1938867702.     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 Jg^(-1) K^(-1)`

NCERT Chapter Solution 11/11.12
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