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0 votes
1.7k views
in Science by (81.6k points)

An ultrasound equipment works at frequency 

a) Higher than 20,000 Hz 

b) Higher than 10,000 Hz 

c) Lower than 20,000 Hz 

d) Lower than 10,000 Hz 

1 Answer

+1 vote
by (71.2k points)
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Best answer

a) Higher than 20,000 Hz

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