\(y = 2\cos(3x)\sin(10t)\) represents:
1. a stationary wave
2. a travelling wave
3. both stationary and travelling wave
4. none of the above
Subtopic:  Standing Waves |
 68%
From NCERT
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A \(1~\text m,\) long tube open at one end with a movable piston at the other end shows resonance with a fixed frequency source (a tuning fork of frequency \(340~\text{Hz}\)) when the minimum tube length is \(25.5~\text{cm}.\) The speed of sound in air at the temperature of the experiment is:
(The edge effects may be neglected.)
1. \(324.16~\text{m/s}\)
2. \(320~\text{m/s}\) 
3. \(345~\text{m/s}\)
4. \(346.8~\text{m/s}\)
Subtopic:  Standing Waves |
 69%
From NCERT
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A steel rod \(100~\text{cm}\) long is clamped at its middle. The fundamental frequency of the longitudinal vibrations of the rod is given to be \(2.53~\text{kHz}.\) What is the speed of sound in steel?
1. \(5.06~\text{km/s}\) 
2. \(5.12~\text{km/s}\) 
3. \(4.29~\text{km/s}\) 
4. \(4.01~\text{km/s}\)

Subtopic:  Standing Waves |
 78%
From NCERT
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