Physics · May / June 2020 · Paper 11 · Question 31
5054Sound
Ultrasound is used to clean jewellery in a liquid. What is another use of ultrasound?
- Aoptical fibre communication
- Bpre-natal scanning
- Csunbeds
- Dtelephone communications
As printed in the paper
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Correct answer: B. pre-natal scanning
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