Answer :
Final answer:
The 750 W microwave that operates for 6 minutes 30 seconds uses 292,500 joules of energy. This is found by converting time to seconds and then multiplying it by the power of the microwave.
Explanation:
To find out how much energy is used by a 750 W microwave that operates for 6 minutes 30 seconds, you'll first need to convert the time to seconds, as watts are a unit of power that equates to one joule per second. So, 6 minutes 30 seconds equates to 390 seconds.
Energy (in joules) = Power (in watts) x Time (in seconds).
So, in this case:
Power = 750 W and Time = 6 minutes 30 seconds = 390 seconds.
Substituting these values into the formula:
Energy = 750 W x 390 s = 292,500 joules.
Therefore, the correct answer is option c. 292,500 j
Afterwards, you multiply the power (in watts) by time (in seconds) to get the energy used in joules. In this case, it's 750 W * 390 seconds = 292,500 joules.
Therefore, option c (292,500 J) is the correct answer.
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