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Select the correct answer.

A microwave has a power rating of 900 watts. How much energy does it consume?

A. 900 joules per hour
B. 900 joules per minute
C. 900 joules per second
D. 9 kilojoules per second

Answer :

To determine how much energy the microwave consumes, you need to understand what the power rating means. A microwave with a power rating of 900 watts uses energy at the rate of 900 joules per second. This is because:

- 1 watt equals 1 joule per second.

Given that the microwave is rated at 900 watts, it consumes energy at 900 joules every second.

Therefore, the correct answer is:

C. 900 joules per second

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