The speed of sound in air is 350 m/s350m/s. The fundamental note emitted by a tube of 0.5 m0.5m closed at one end:
Correct answer: B. 350 Hz50Hz
- A. 50Hz
- B. 350 Hz50Hz
- C. 175Hz
- D. 500Hz
Explanation
The fundamental frequency (f) of a closed-end organ pipe is given by the formula f=v2l , where v is the speed of sound and L is the length of the pipe. Substituting the given values, we get f=350m/s/2×0.5m =350Hz.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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