Question

Ultrasound was used to check for cracks in an aeroplane wing. The ultrasound pulse would be reflected from any cracks and from the end of the wing. The diagram shows the oscilloscope trace produced by the echo. How long was the plane wing? The speed of sound in metal is 5000m/s.
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Answer 1

Answer:

Ultrasound waves have a frequency higher than the upper limit for human hearing – above 20,000 Hertz (Hz). Different species of animal have different hearing ranges. This explains why a dog can hear the ultrasound produced by a dog whistle, but humans cannot.

Uses of ultrasound

Uses of ultrasound include:

breaking kidney stones

Answer 2

Answer: 2metres

Step-by-step explanation:

5000 x 0.0004 = 2