A narrow pulse (for example, a short pip by a whistle) is sent across a medium. If the pulse rate is 1 after every 20 s (that is the whistle is blow for a split of second after every 20 s). Is the frequency of the note produced by the whistle equal to `1//20` or `0.05 Hz`?

A narrow sound pulse (for example, short pip by a whistle ) is sent across a medium. (a) Does the pulse have a definite (i) wavelength (ii) frequency (iii) speed of propagation. (b) If the pulse rate is 1 after every 20s, i.e. the whistle is blown for a split second after every 20 second, is the frequency of the note produced by the whistle equal to 1//20=0.05Hz?

A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium. (a) Does the pulse have a definite (i) wavelength, (ii) frequency, (iii) speed of propagation ? (b) If the pulse rate is 1 after every 20 s , (i.e. the whistle is blown for a split second after every 20 s ) is the frequency of the note produced by the whistle equal to (1)/(20) = 0.05 Hz ?

An engine standing at the platform blows a whistle of frequency 305 Hz. If the velocity of sound be 1220 km/h, the frequency of the whistle as heard by a man running towards the engine with a speed of 20 km/s is

A train moves towards a stationary observer with a speed of 40 m/s. The observer records the frequency of the train's whistle as f_(1) . But when the train's speed is reduced to 20 m/s, the frequency of the whistle recored by him is f_(2) . What is the ratio (f_(1))/(f_(2)) , if the speed of sound in air is 340 m/s ?

Two trains one moving at a speed of 30 mile/h and iother at 60 mile/h, approaching each other. When a faster train blows a whistle, the apparent friequency of the note head by an observer at rest behind the faster train is 1852 Hz. Calculate the frequency of note produced by faster train (Assume speed of sound to be 1100 ft/s)

A train approaching a railway platform with a speed of 20 m s^(-1) starts blowing the whistle. Speed of sound in air is 340 m s^(-1) . If the frequency of the emitted sound from the whistle is 640 Hz, the frequency of sound as heard by person standing on the platform

An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle whose echo is heard by the driver after 5 seconds. If the speed of sound in air is 330 m/s, then the speed of the engine is :

At 20^(@) C, an open organ pipe produces a note of frequency 256 Hz. What will be the length of pipe if velocity of sound at 0^(@)C is 340 m/s ?