Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 22 - Electromagnetic Waves - Problems - Page 642: 33

Answer

400 square meters. This is impractically large!

Work Step by Step

Use the given intensity, which is the power divided by area. $$I=\frac{P}{A}$$ $$A=\frac{P}{I}=\frac{(100hp) (746W/hp)}{200W/m^2 }=373m^2\approx 400m^2$$
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