1)If the length of the tube used in our experiment is 4 m, how many resonances w
ID: 2251150 • Letter: 1
Question
1)If the length of the tube used in our experiment is 4 m, how many resonances would you observe when a tuning fork of frequency 512 Hz is used in air where the speed of sound is334.4 m/s? (For this question, the length of the tube is of the entire plastic cylinder, and not the adjustable length of the air column.)
2)A student is using a resonance tube and determines that three resonances occur at distances of
If the length of the tube used in our experiment is 4 m, how many resonances would you observe when a tuning fork of frequency 512 Hz is used in air where the speed of sound is334.4 m/s? (For this question, the length of the tube is of the entire plastic cylinder, and not the adjustable length of the air column.) A student is using a resonance tube and determines that three resonances occur at distances of L1 = 0.111 m, L2 = 0.328 m, and L3 = 0.549 m below the open end of the tube. The frequency of the tuning fork used is 7.68 times 102 Hz. What is the average speed of sound from these data?Explanation / Answer
L2 - L1 = L3 - L2 = L4- L3 = lambda/2
lambda 1 = 2*(L2 - L1) = 0.434
v1= 333.31
lambda 2 = ( L3 - L2) = 0.221
v2= 169.728
lambda 3 = 2/3*( L4- L3)
V = lambda*f
= lambda(avg) * 768
= 0.3385*768 = 251.52 m/s
as we can see from above velocities average is same as we are getting finally .. thanks
hope this helps!!!!
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