Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 33 - Think and Solve - Page 634: 37


The tank holds approximately 499 gallons.

Work Step by Step

After adding one gallon containing radioactive material, everything was mixed. The gallon that was removed contained $\frac{10}{5000} = \frac{1}{500}$ of the original radioactive particles. If each of the other 499 gallons remaining in the tank has the same amount of radioactive particles, that would account for all of them.
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