#### Answer

Please see the work below.

#### Work Step by Step

We know that
$COP=\frac{Cooling \space effect}{Work \space input}$
We plug in the known values to obtain:
$COP=\frac{30MJ}{10MJ}$
$COP=3$

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Published by
Pearson

ISBN 10:
0321993721

ISBN 13:
978-0-32199-372-4

Please see the work below.

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