Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 17 - Exercises and Problems: 50

Answer

Please see the work below.

Work Step by Step

We know that $Q=mc\Delta T+mL_v$ We plug in the known values to obtain: $Q=(420)(4184)(100-20)+(420)(2257000)$ $Q=1.0885\times 10^{12}J$ Now we can find the duration as $t=\frac{Q}{P}$ We plug in the known values to obtain: $t=\frac{1.0885\times 10^{12}}{200\times 10^6}$ $t=5400s \approx 1.5 h$
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