A steel drill with a mass of 100 g heated up from 20 to 120 degrees during operation.
| September 5, 2021 | education
A steel drill with a mass of 100 g heated up from 20 to 120 degrees during operation. How much heat is expended to heat the drill?
Heating of a steel drill: Q = C * m * (t2 – t1), where by condition C (const) = 500 J / (kg * K); m = 100 g = 0.1 kg; t2 = 120 ºC; t1 = 20 ºC.
Q = C * m * (t2 – t1) = 500 * 0.1 * (120 – 20) = 500 * 0.1 * 100 = 5000 J = 5kJ.
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