Question

In a resonance column, first and second resonance are obtained at depths 22.7 cm and 70.2 cm. The third resonance will be obtained at a depth(a) 117.7 cm(b) 92.9 cm(c) 115.5 cm(d) 113.5 cm

Answer 1

the answer is (b) 92.9

Answer 2

Answer:

a) 117.7cm

Explanation:

First depth = 22.7

Second depth = 70.2

Thus,

L1+e = γ/y

L2+e = 3γ/y

L3+e = 5γ/y

L2-L1 = γ/2

70.2-22.7 = γ/2

L3-L2 = γ/2

L3- 70.2 = 47.5

L3 = 117.7

Thus the third resonance will be obtained at 117.7 cm