During an ultrasound, sound waves are sent by a transducer through muscle tissue at a speed of 1300 m/s. Some of the sound waves are reflected from a metal fragment 3.0 cm into the muscle tissue. How long did it take the transducer to detect the reflected waves from the metal fragment after they were first emitted?  a 23 seconds  b 39 seconds  c 2.3 x 10−5 seconds  d 3.9 x 10−5 seconds

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Chapter17: Sound
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During an ultrasound, sound waves are sent by a transducer through muscle tissue at a speed of 1300 m/s. Some of the sound waves are reflected from a metal fragment 3.0 cm into the muscle tissue. How long did it take the transducer to detect the reflected waves from the metal fragment after they were first emitted?

 a

23 seconds

 b

39 seconds

 c

2.3 x 10−5 seconds

 d

3.9 x 10−5 seconds

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