First slide

Stationary waves

Question

A student determines the velocity of sound with the help of a closed organ pipe. If the observed length for fundamental frequency is 24.7 m, the length for third harmonic will be

Easy

A

74.1 cm
B

72.7 cm
C

75.4 cm
D

73.1 cm

Solution

$l_{2} = 3 l_{1} = 3 \times 24 .7 = 74 .1 cm$

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