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Physics
Physics
Problem
Which of the following sound frequencies is classified as ultrasound? a)
15
kHz
15\,\text{kHz}
15
kHz
b)
10
Hz
10\,\text{Hz}
10
Hz
c)
25
kHz
25\,\text{kHz}
25
kHz
d)
18
kHz
18\,\text{kHz}
18
kHz
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