The distance between two consecutive crests in a wave train produced in a string is 5 cm. If 2 complete waves pass through any point per second, the velocity of the wave is :

1. 10 cm/sec

2. 2.5 cm/sec

3. 5 cm/sec

4. 15 cm/sec

A tuning fork makes 256 vibrations per second in air. When the velocity of sound is 330 m/s, then the wavelength of the tone emitted is :

1. 0.56 m

2. 0.89 m

3. 1.11 m

4. 1.29 m

Sound waves have the following frequencies that are audible to human beings :

1. 5 c/s

2. 27000 c/s

3. 5000 c/s

4. 50,000 c/s

The minimum audible wavelength at room temperature is about

1. 0.2 Å

2. 5 Å

3 5 cm to 2 metre

4. 20 mm

The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is 

1.  $\sqrt{2/7}$

2.  $\sqrt{1/7}$

3.  $\sqrt{3}/5$

4.  $\sqrt{6}/5$

The frequency of a rod is 200 Hz. If the velocity of sound in air is 340 ms^–1, the wavelength of the sound produced is :

1. 1.7 cm

2. 6.8 cm

3. 1.7 m

4. 6.8 m

A man drops a stone into a lake from the top of a tower that is \(500~\text{m}\) high. If the speed of sound in air is \(340~\text{m/s},\) approximately how long after releasing the stone will he hear the sound of the splash? \(\left(\text{take }g=10~\text{m/s}^2\right)\)
1. \(11.5~\text{s}\)
2. \(21~\text{s}\)
3. \(10~\text{s}\)
4. \(14~\text{s}\)

When sound waves travel from air to water, which of the following remains constant 

1. Velocity

2. Frequency

3. Wavelength

4. All the above

At what temperature velocity of sound is double than that of at 0°C 

1. 819 K

2. 819°C

3. 600°C

4. 600 K

If velocity of sound in a gas is 360 m/s and the distance between a compression and the nearest rarefaction is 1m, then the frequency of sound is 

1. 90 Hz

2. 180 Hz

3. 360 Hz

4. 720 Hz