Question

A U-tube having unequal arm-lengths has water in it. A tuning fork of frequency 440 Hz can set up the air in the shorter arm in its fundamental mode of vibration and the same tuning fork can set up the air in the longer arm in its first overtone vibration. Find the length of the air columns. Neglect any end effect and assume that the speed of sound in air = 330 m s−1.

Answer 1

Answer:

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Answer 2

Explanation:

for short arm

f=v/4l

440=330/4l

l=0.187m

for long arm

f=3v/4l

l=3×330/4×440

l=0.56m

hope that help