# A steel drill with a mass of 200 g when the engine is running heats up from 15 degrees to 115 degrees

June 28, 2021 | education

| **A steel drill with a mass of 200 g when the engine is running heats up from 15 degrees to 115 degrees how much energy is spent how much energy is spent to heat the drill.**

To solve the presented problem, we write down the formula for finding the amount of heat for a steel drill, it is equal to the expended energy:

E = Q = cm (t – t0),

where Q is the amount of heat,

с – specific heat capacity of steel,

t is the final temperature of the drill,

t0 is the starting temperature of the drill.

The specific heat capacity of steel is 460 J / kg * 0С.

Let’s convert the mass to kilograms:

200 g = 0.2 kg.

Substitute all known quantities into the formula for the amount of heat:

E = 460 * 0.2 * (115 – 15) = 460 * 0.2 * 100 = 460 * 20 = 9 200 J.

Answer: 9 200 J.

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