A small air compressor operates on a 2.8 hp (horsepower) electric motor for 9.1 hours a day. How much energy is consumed by the motor daily? 1 hp equals about 750 watts. Answer in units of J.

68796000 J.

Explanation:

Energy: This  can be defined as the ability and the capacity to do work. The S.I unit of energy is Joules. (J).

From the question,

E = P×t Equation 1

Where E = Energy, P = power, t = time.

Note: if the compressor operates 9.1 hours a day,

Given: P = 2.8 hp = (2.8×750) = 2100 J, t = 9.1 hours = 9.1×3600 = 32760

Substitute into equation 1

E = 2100×32760

E = 68796000 J.

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