A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg…
Physics · Class 11 · CBSE — Thermal Properties of Matter
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 is 2.5 minutes, assuming 50% power is used up is heating the machine itself or lost to the surrounding. (Specific heat of aluminium = 0.91 J g–1°C–1)
- 100 °C
- 103 °C
- 150 °C
- 155 °C
Answer
(B) 103 °C
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