The wavelength of the sound emitted from a tuning fork at 27.3 oC is 1m. What will be the wavelength in the same medium at 0 oC?
[Answer :  95 cm]
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Dear Student,

The frequency of a tuning fork depends on its material and dimensions, as such it is given by the following formula

f=12πL2AYρwhere:ρ density of the material the fork is made ofY: Young's modulus of that materialL: Length of the prongsA:cross section area of the prongsYoung's modulus, or modulus of elasticity is directly proportional to temperature.Thus, we obtainf1/Tor, λTapplying this,λ'λ=273300.3or, λ'100=0.95or, λ'=95 cm
Regards.

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