The ratio of velocity of sound in hydrogen and oxygen at STP is.
16:1
8:1
4:1
2:1
The transverse wave represented by the equation has
amplitude = 4π
speed of propagation = 5
The phenomenon by which stars recede from each other is explained by
Black hole theory
Neutron star theory
White dwarf
Red shift
When the source is moving towards the stationary observer, the apparent frequency is given by
Newton's formula for the velocity of sound in gases is
The displacement y of a wave travelling in the X-direction is given by
300
600
1200
200
The frequency of a simple harmonic wave is given by where x and y are in meter and time is in second. The period of the wave in second will be
0.04
0.01
1
5
A racing car moving towards a cliff sounds its horn. The driver observe that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If is the velocity of sound, the velocity of the car is
Five sinusoidal waves have the same frequency 50 Hz but their amplitudes are in the ratio and their phase angles and respectively. The phase angle of resultant wave obtained by the superposition of these five waves is
30o
45o
60o
90o
The velocities of sound at the same temperature in two monoatomic gases of densities of are respectively. If then the value of is.
1/4
1/2
2
4