Sound Waves Questions

A wave travelling in the +ve x-direction having displacement along y-direction as 1m, wavelength 2π m and frequency of Hz is represented by :...

A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz, The second harmonic of the source of unknown frequency gives five beats per second, when sounded wi...

If we study the vibration of a pipe open at both ends, then the following statement is not true :

A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below1250 Hz. The velocity of sound in air is 340 m/s....

The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are (velocity of sound = 340 ms-1)...

A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If...

The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both the ends is :-...

20. Tow cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a a frequency 400 Hz. The frequency heard...

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of15 ms-1. Then, the frequency of sound that the observer hears in the echo reflected from the cliff...

The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is :-

Two vehicles, each moving with speed u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity w. One of these vehicles blows a whistle of frequency f...

A student is performing an experiment using a resonance column and a tuning fork of frequency 244 s-1. He is told that the air in the tube has been replaced by another gas (assume that the column rema...

One end of a taut string of length 3 m along the x-axis is fixed at x = 0. The speed of the waves in the string is 100 ms-1. The other end of the string is vibrating in the y-direction so that station...

In an experment to measure the speed of sound by a resonating air column, a tuning fork of frequency 500 Hzis used. The length of the air column is varied by changing the level of water in the resonan...

A radar has a power of 1 kW and is operatingat a frequency of 10 GHz. It is located on amountain top of height 500 m. The maximumdistance upto which it can detect object locatedon the surface of the e...

A cylindrical tube, open at both ends, has afundamental frequency, f, in air. The tube isdipped vertically in water so that half of it is inwater. The fundamental frequency of theair-column is now :-...

A point mass is subjected to two simultaneous sinusoidal displacements in x-direction, x1(t) = A sin ωt and x2(t) = A sin . Adding a third sinusoidal displacement x3(t) = B sin (wt + φ) brin...

Two sources of sound placed close to each other, are emitting progressive waves given byy1 = 4 sin 600 πt and y2 = 5 sin 608 πt. An observer located near these two sources of sound will hear...

A student is performing the experiment of resonance Column. The diameter of the column tube is4 cm. The frequency of the tuning fork is 512 Hz. The air temperature is 38oC in which the speedof sound i...

Two identical piano wires, kept under the same tension T have a fundamental frequency of 600 Hz. The frictional increase in the tension of one of the wires which will lead to occurrence of 6 beats/s w...