Question

6. Define power. What is the commercial unit of energy. One commercial unit of energy equals to how many joules. A family uses 250 units of electrical energy during a moth. Calculate the electrical energy in joules.

Answer 1

1 unit = 1 kilowatt hour

1 kilowatt hour = 3.6 x 10^6 J

So 1 unit = 3.6 x 10^6 J

250 units = 250 x 3.6 x 10^6 J = 90.00 x 10^6 J = 90 x 10^6 J

Answer 2

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1 unit = 1 kilowatt hour

1 kilowatt hour = 3.6 x 10^6 J

So 1 unit = 3.6 x 10^6 J

250 units = 250 x 3.6 x 10^6 J = 90.00 x 10^6 J = 90 x 10^6 J

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