A steel part weighing 500 g when machined on a lathe heated up to 20 degrees Celsius.

A steel part weighing 500 g when machined on a lathe heated up to 20 degrees Celsius. What is the change in the internal energy of the part?

The change in the internal energy of a steel part can be calculated using the formula:
Q = C * m * ∆t, where C is the specific heat capacity of steel (C = 500 J / (kg * K)), m is the mass of the steel part (m = 500 g = 0.5 kg), ∆t is the temperature change steel part (∆t = 20 ºС).
Let’s calculate the change in the internal energy of a steel part:
Q = C * m * ∆t = 500 * 0.5 * 20 = 5000 J = 5 kJ.
Answer: The internal energy of the steel part will increase by 5 kJ.