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3 years ago

At a fabrication plant, a hot metal forging has a mass of 75 kg and a specific heat

Physics

1 answer:

Lesechka [4]3 years ago

3 0

Answer:

940°C

Explanation:

Heat lost by the forging = heat gained by the oil

-mCΔT = mCΔT

-(75 kg) (430 J/kg/°C) (47°C − T) = (710 kg) (2700 J/kg/°C) (47°C − 32°C)

-32250 (47°C − T) = 1917000 (15°C)

47°C − T = -892°C

T = 939°C

Rounded to two significant figures, the initial temperature is 940°C.

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Explanation:

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I hope it helps you!

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2 years ago

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