3 years ago

Can somebody help me with this quiz please

Physics

1 answer:

mezya [45]3 years ago

4 0

Sure what do u need help with

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How much time is needed to produce 720 Joules of work if 90 watts of power is used?

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8 seconds

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power (P) is defined as the rate at which work is done.

power is measured in Watts (W) , when the work done is measured in Joules (J) and time in seconds

by the definition of power,

$Power=\frac{work.done}{time.taken} \\ \\ time.taken=\frac{work.done}{power}\\=\frac{720J }{90W} \\ \\ =8 s$