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While measuring the speed of sound by performing a resonance column experiment, a student gets the first resonance condition at a column length of 18 cm during winter. Repeating the same experiment during summer, she measures the column length to be x cm for the second resonance. Then

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18 > x

x > 54

54 > x > 36

36 > x > 18

answer is B.

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Detailed Solution

In Resonance column experiment first resonates V = 2n(l₂ - l₁) length l , second resonates at 3l.
Where temperature increases, Velocity increases so l₂ increases.

l₂ > 3l, l₂ > 54

So x > 54

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