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standing waves are produced in a 1.5m long closed-closed tube that\'s filed with

ID: 1591658 • Letter: S

Question

standing waves are produced in a 1.5m long closed-closed tube that's filed with air (v= 343m/s) what are the first 3 allowed frequencies to produce standing waves? (In Hz) standing waves are produced in a 1.5m long closed-closed tube that's filed with air (v= 343m/s) what are the first 3 allowed frequencies to produce standing waves? (In Hz) standing waves are produced in a 1.5m long closed-closed tube that's filed with air (v= 343m/s) what are the first 3 allowed frequencies to produce standing waves? (In Hz)

Explanation / Answer

length l = 1.5 m

velocity v = 343 m/sec

in closed tube L = Lamda/4

lamda = 4L = 4 X1.5= 6 m

frequency f = v/4L =343/6 = 57.16 HZ

SECOND HARMONIC FREQUENCY F2 = 3F =171.48 HZ

third harmonic frequency F3 = 5F = 285.8 HZ