Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 10 - Fluids - General Problems - Page 290: 97

Answer

0.27 kg.

Work Step by Step

The buoyant force on the completely submerged wood equals the combined weight of the wood and the copper. $$(m_{wood}+m_{Cu})g=V_{wood}\rho_{water}g= \frac{m_{wood}}{ \rho_{wood}}\rho_{water}g $$ $$ m_{Cu}= m_{wood}(\frac{\rho_{water}}{ \rho_{wood}}-1)=0.27\;kg$$
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