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: 64

Answer

Please see the work below.

Work Step by Step

We know that $H=\frac{\Delta }{R}$ We also know that $Q=Ht$ and $Q=mL_f$ $\implies Ht=mL_f$ This can be rearranged as: $m=\frac{\Delta Tt}{RL_f}$ We plug in the known values to obtain: $m=\frac{(20)(15\times 60\times 60)}{(0.12)(334000)}$ $m=27Kg$
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