Conceptual Physics (12th Edition)

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

Chapter 21 - Reading Check Questions (Comprehension) - Page 401: 15


The 3 classes of instruments are grouped by how they produce sound: by vibrating strings, vibrating air columns, and a vibrating 2-D surface (i.e., percussion instruments).

Work Step by Step

This is discussed on pages 396-397.
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