Sound waves travel fastest in
A transverse wave consists of
The displacement of an elastic wave is given by the function y = 3 sin wt + 4 cos wt where y is in cm and t is in s. The resultant amplitude is
Which of the following statements is incorrect during propagation of a plane progressive mechanical wave?
The equation of a stationary wave along a stretched string is given by y = 5 sin x cos 40pt where x and y are in cm and t is in s. The separation between two adjacent nodes is
Two identical sinusoidal waves each of amplitude 10 mm with a phase difference of 120° are travelling in the same direction in a string. The amplitude of the resultant wave is
A body sends waves 100 mm long through medium A and 0.25 m long in medium B. If the velocity of waves in medium A is 80 cm s¯¹. The velocity of waves in medium B is
The relation between frequency u, wavelength l and velocity of propagation of wave n is
Velocity of sound in vacuum is
At what temperature will the speed of sound in air be 3 times its value at 0°C?
A 10 m long steel wire has mass 5 g. If the wire is under a tension of 80 N, the speed of transverse waves on the wire is
According to Newton’s formula, the speed of sound in air at STP is
(Take the mass of 1 mole of air is 29 × 10‾³ kg)
A progressive wave is represented by y = 5 sin (100π t – 2πx) where x and y are in m and t is in s. The maximum particle velocity is
The speed of transverse wave on a stretched string is
A sound is produced by plucking a string in a musical instrument, then
Speed of sound waves in a fluid is
If the bulk modulus of water is 2100 MPa, what is the speed of in water?
Which of the following properties of a wave is independent of others?
A transverse wave is represented by y = Asin(ωt – kx). For waht value of the wavelength is the wave velocity equal to the maximum particle velocity?
Sound waves travel at 350 m s‾¹through a warm air and at 3500 m s‾¹ through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
A man standing between two parallel hills, claps his hand and hears successive echoes at regular intervals of 1 s. If velocity of sound is 340 m s‾¹, then the distance between the hills is
When sound wave is refracted from air to water which of the following quantities remians unchanged?
The phenomenon of echo is an example of
Which of the following statements is incorrect for a stationary wave?
When a string fixed at its both ends vibrates in 1 loop, 2 loops, 3 loops and 4 loops, the frequencies are in the ratio
