Asked by AJ
A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating in its third harmonic.
Find the speed of transverse waves in the wire if the speed of sound in air is 340 m/s. Answer in units of m/s.
Find the speed of transverse waves in the wire if the speed of sound in air is 340 m/s. Answer in units of m/s.
Answers
Answered by
bobpursley
open one end, acoustic length of tube must be 1/4 lambad
sound wavelength=.80meters
frequency=340/.8 hz
now, you know the length of the wire is 3/2 lambda
frequency(lambda)=speed
solve for speed on the wire.
sound wavelength=.80meters
frequency=340/.8 hz
now, you know the length of the wire is 3/2 lambda
frequency(lambda)=speed
solve for speed on the wire.
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