Physics · Oct / Nov 2020 · Paper 12 · Question 28
5054Sound
Which row correctly describes ultrasound?
- Alongitudinal, less than 20 kHz
- Blongitudinal, greater than 20 kHz
- Ctransverse, less than 20 kHz
- Dtransverse, greater than 20 kHz
As printed in the paper
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Correct answer: B. longitudinal, greater than 20 kHz
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