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2 years ago

How much energy is used when the incandescent bulb is left on for 12 hours

Physics

1 answer:

Reil [10]2 years ago

3 0

You haven't told us the "wattage" rating of the bulb. We'll just have to call it ' W ' .

The bulb uses energy at the rate of W watts, or 0.001W kilowatts.

In 12 hours, it uses 0.012W kilowatt-hours of energy.

= = = = =

W watts = W Joules/second

1 hour = 3600 seconds

12 hours = (12 x 3600) seconds

Energy = (W Joule/sec) x (12 x 3600 sec)

Energy = 43,200W Joules

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3 years ago

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