A 440-Hz tuning fork is now used with a closed-end tube resonating column to determine the velocity of sound in a different gas than air. If the spacings between resonances are 1.10 m, what is the velocity of sound in this medium?

Explanation:

Given

frequency

Spacing between the resonance is  

For one end closed resonance spacing is given by

Resonance spacing

and velocity is given by

substituting the values we get

i think they are all correct

explanation:

they seem good

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