Multiple Choice
Sonar is used to determine the speed of an object. A 40.0-kHz signal is sent out, and a 42.0-kHz signal is returned. If the speed of sound is 345 m/s, how fast is the object moving?
A) 347 m/s
B) 331 m/s
C) 8.4 m/s
D) 6.9 m/s
Correct Answer:
Verified
Correct Answer:
Verified
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