A. 2.0×10²Hz
B. 4.5×10³Hz
C. 2.0×10³Hz
D. 4.5×10²Hz
Correct Answer:
Option C – 2.0×10³Hz
Explanation
Wavelength = 15cm = 0.15m
Velocity = 300m/s
V = fx
F = V/Wavelength
F = 300/0.15 Hertz
F = 2 x 10³Hz
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