Question 9:

A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

Answer:

1 unit of energy is equal to 1 kilowatt hour (kWh).

1 unit = 1 kWh

1 kWh = 3.6 × 10⁶ J

Therefore, 250 units of energy = 250 × 3.6 × 10⁶ = 9 × 10⁸ J

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