Answer:
30000 J
Explanation:
Power is defined as the amount of work done per unit time:
\(P=\frac{W}{t}\)
where
P is the power
W is the work done
t is the time taken
In this problem, we know the power of the microwave oven: \(P=1000 W\), and we are asked to find the work done in a time of \(t=30 s\), so by re-arranging the equation we find:
\(W=Pt=(1000 W)(30 s)=30,000 J=30 kJ\)
