Question

8. Determine the number of kilowatt-hours (kWh) for each of the following energy consumption
a. 2500 W for 2h
b. 100,000 W for 5h

Answer 1

Answer on Question #62687, Physics / Mechanics | Relativity

8. Determine the number of kilowatt-hours (kWh) for each of the following energy consumption

a. 2500 W for 2h

b. 100,000 W for 5h

Solution:

$$Power = \frac{Energy}{Time}$$

or

$$Energy = Power \times Duration \ of \ Usage \ (Time)$$

a)

$$Energy = 2500 \ W \times 2 \ h = 5000 \ Wh = 5 \ kWh$$

b)

$$Energy = 100,000 \ W \times 5 \ h = 500,000 \ Wh = 500 \ kWh$$

Answer: a. 5 kWh; b.

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