Answer
$24W/m^{2}$
Work Step by Step
$I=\frac{P}{4\times pi \times R^{2}}=\frac{7500}{4\times 3.14\times 25}=24W/m^{2}$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 14 - Sound - Learning Path Questions and Exercises - Exercises - Page 524: 29
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