Question

A 40 Watt lightbulb is on for 3 minutes. How many joules of work does it do?

Answer 1

Answer:

Explanation:

Power (p)= 40 watt

time (t)= 3 minutes = 180 seconds

Energy (E)= ?

we know

P = E/t

40 = E / 180

E = 7200 Joules

Therefore it does 7200 joules of work.

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