Calcuate the least mass of air that will...

Calcuate the least mass of air that will resonate with a tuning fork of frequency `340 Hz` in a closed tube of diameter 4 cm at `30^(@)C`. (Velocity of sound in air at `30^(@) = 350 ms^(-1)` and density of air at `30^(@)C = 1.3 kg` per cubie metre). Neglect end -correction .

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The correct Answer is:

0.42 g

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