Which one of the following statements is true :-
Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 s and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points?
Equation of a progressive sound wave is y = a sin (400πt-πx/0.85) where x in (metre), t (second), then frequency of wave is :
Wavelength of the wave in the above question is :
The equation of a sound wave is y = 0.0015 sin (62.8x + 316t). Find the wavelength of this wave-
The equation of a wave is given by
y = a sin (100t-x/10 ), where x and y are in meter and t in second; then velocity of wave is :
What will be the wave velocity, if the radar gives 5.4 waves per minute and wavelength of the given wave is 10m?
The temperature in ºC at which the velocity of sound in air is half its value at 0ºC is -
An earthquake generates both transvere (S) and longitudinal (P) sound waves in the earth . The speed of S waves is about 4.5 km/s and that of P waves is about 8.0 km/s. A seismograph records P and S waves from an earthquake. The first P was arrives 4.0 min before the first S wave. The epicenter of the earthquake is located at a distance about
On increasing the temperature by 1°C of sound, its velocity increases by :
At which temperature the speed of sound will be three times of its speed at 0°C ?
When temperature increases, the frequency of a tuning fork :
The ratio of speed of sound in nitrogen gas to that in helium gas at 300 K is
A person is talking in a small room and the sound intensity level is 60 dB everywhere within the room. If there are eight people talking simultaneously in the room, what is the sound intensity level ?
When two waves with same frequency and constant phase difference interfere,
The terms pitch, quality and loudness of sound are associated with the following, respectively-
A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of :
A point source emits sound equally in all directions in a non-absorbing medium, Two points P and Q are at distances of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is –
The sound intensity is 0.008 W/m² at a distance of 10 m from an isotropic point source of sound. The power of the source is :
The energy per unit area associated with a progressive sound wave will be doubled if :
Sound waves from a tuning fork F reach a point P by two separate routes FAP and FBP (when FBP is greater than FAP by 12 cm there is silence at P). If the difference is 24 cm the sound becomes maximum at P but at 36 cm there is silence again and so on. If velocity of sound in air is 330 ms‾¹, the least frequency of tuning fork is :
When a sound wave is reflected from a wall, the phase difference between the reflected and incident pressure wave is:
To hear the echo in 1 second, the minimum distance of the source from the reflecting surface should be:
