Question

2238 J of work done by an engine in half a minute The power spent is.​

Answer 1

Answer:

The power spent is 1,119

Answer 2

Answer:

The efficiency is given by

η=

Energy

Work done

η=

3.6×10

9

5.4×10

8

=0.15=15%

Energy wasted =3.6×10

9

−5.4×10

8

=3.06×10

9

J