Answer:
30000 J
Explanation:
Power is defined as the amount of work done per unit time:
[tex]P=\frac{W}{t}[/tex]
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: [tex]P=1000 W[/tex], and we are asked to find the work done in a time of [tex]t=30 s[/tex], so by re-arranging the equation we find:
[tex]W=Pt=(1000 W)(30 s)=30,000 J=30 kJ[/tex]
