Specific Heat: A machine part consists of 0.10 kg of iron (of specific heat 470 J/kg ? K ) and 0.16 kg of copper (of specific heat 390 J/kg ? K). How much heat must be added to the gear to raise its temperature from 18°C to 53°C?
A. 910 J
B. 3800 J
C. 4000 J
D. 4400 J
Answer: B
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