8.5 kwh is equal to:

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14x10⁶J

30.6x10⁶J

14.4x10⁸J

14.4x10⁵J

answer is B.

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Detailed Solution

A kilowatt-hour (kWh) is the amount of electrical energy consumed by a 1000-watt appliance over the course of an hour.

According to the question, 8.5 kwh can be defined as the amount of electrical energy consumed in an hour by an 8500-watt electrical appliance.

1 Watt=1 Joule / second.

1 Kilowatt hour is 3.6 mega joules.

$8.5 k w h = 3.6 \times 8.5 = 30.6 m e g a j o u l e s = 30.6 \times 10^{6} J$

The correct answer is 30.6x10⁶J.

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