Conceptual Physics (12th Edition)

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

Chapter 20 - Think and Discuss: 86

Answer

The pitch decreases.

Work Step by Step

To answer the question, try it and see! Pouring in water increases the mass of the system while the "springiness" of the glass stays the same. Its natural frequency decreases.
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