Conceptual Physics (12th Edition)

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

Chapter 35 - Think and Discuss: 94

Answer

It will be far too small to measure, but in theory, the acid bath that dissolved the formerly latched pin contains more energy. It will thus will be warmer, and more massive.

Work Step by Step

The pin that was latched contained more potential energy than the other pin. This extra energy corresponds to a tiny bit more mass, by an amount $E=mc^{2}$.
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