Question on: WAEC Physics - 1998
the shortest length of the air column in a resonance tube at resonance is 0.12m and the next resonance length is 0.37m. calculate the frequency of vibration given that the speed of sound in air is 340m-1
A
1360Hz
B
694Hz
C
680Hz
D
34Hz
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Correct Option: C
f = (\frac{v}{2(l_2 - l_1)} = \frac{340}{2(0.37 - 0.12)} = \frac{34}{0.5}) = 680
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