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A specific ultrasonic application (used for metallurgy) has a frequency of 20,000 Hz. Using the speed of sound in steel = 5750 m/s. An ultrasonic pulse is sent off a steel beam

1. An ultrasonic pulse is sent off a steel beam bounces off a the end and the pulse is detected 0.003 seconds later. What is the total distance the sound wave travels?

2. How long is the steel beam?

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