CBSE Class 11-science Answered
A meter long tube open at one end with a movable piston at the other end shows ressonance with a fixed frequency source ( a tuning fork of frequency 340Hz) when the tube length is 25.5cm or 79.3 cm. estimate the speed of sound in air at the temperature of the expperiment. the edge effect may be neglectd.
Asked by pragyanshree mishra | 05 Mar, 2015, 09:44: AM
Expert Answer
Frequency of the turning fork, ν = 340 Hz.
As the given pipe is attached with a piston at one end, it will behave as a pipe with one end closed and the other end open.
Such a system produces odd harmonics.
The fundamental note in a closed pipe is given:
Length of the pipe, l1=25.5 cm = 0.255 m
The speed of sound is given by the relation:
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