How many degrees of freedom the gas molecules have if, under \(\text{STP}\), the gas density \(\rho = 1.3~\text{kg/m}^3\) and the velocity of sound propagation in it is \(330~\text{ms}^{-1}\)?
1. \(3\)
2. \(5\)
3. \(7\)
4. \(8\)
Equation of the wave is given by y = 0.4 sin(314t - 3.14x), where x and y are in meter and t is in second. The speed of the wave is :
1. 50 m/s
2. 100 m/s
3. 314 m/s
4. 3.14 m/s
A plane progressive wave cannot be represented by
1.
2.
3.
4.
The phase difference between the prongs of a tuning fork is :
1.
2.
3.
4.
The isothermal elasticity of a medium is and the adiabatic elasticity in . The velocity of sound in the medium is proportional to
1.
2.
3.
4.
When a wave is reflected from a denser medium the change in phase is :
1. 0
2.
3.
4.
In a stationary wave along a string, the strain is:
1. zero at the antinodes
2. maximum at the antinodes
3. zero at the nodes
4. maximum at the nodes
A source of sound moves away with the velocity of sound from a stationary observer. The frequency of the sound heard by the observer:
1. remains the same
2. is doubled
3. is halved
4. becomes infinity
The longitudinal waves can travel :
1. only in liquids
2. only in solids
3. only in gases
4. In liquids, solids, and gases
The equation of a wave pulse travelling along x-axis is given by , x and y are in meters and t is in seconds. The amplitude of the wave pulse is
1. 5 m
2. 20 m
3. 15 m
4. 30 m