Conceptual Physics (12th Edition)

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

Chapter 35 - Think and Explain: 66

Answer

His pulse would be slower, and his volume would be smaller.

Work Step by Step

A fast-moving person's clocks appear to run slowly because of time dilation. His observed pulse would slow down (along with all other clocks, biological or otherwise). Lengths are contracted along the direction of motion, so his measured volume would decrease.
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