A narrow sound 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 blown 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,a short pipe by a whistle) is sent across a medium 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=0.05Hz ?

A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium, Does the pulse have a definite frequency.

A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium, Does the pulse have a definite wavelength.

A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium, Does the pulse have a definite speed of propagation.

A narrow sound pulse (for example,a short pipe by a whistle) is sent across a medium Does the pulse have a definite (i) frequency,(ii)wavelength,(iii)speed of propagation?

A train, standing in a station-yard, blows a whistle of frequency 400 Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 m s^-1 . What are the frequency, wavelength, and speed of sound for an observer standing on the station’s platform? Is the situation exactly identical to the case when the air is still and the observer runstowards the yard at a speed of 10 m s^-1 ? The speed of sound in still air can be taken as 340 m s ^-1 .

A conducting rod PQ of length 20 cm and resistance 0.1 Omega rests on two smooth parallel rqails of negligible resistance AA' and CC'. It can slide on the rails and the arrangement is positioned betwaeen the poles of a permanent magnet producing unifrom magnetic field B=0.4 T. The rails, the rod and the magneitc field are in the three mutually perpendicular directions as shown in the figure. if hte ends A and C of the rails are short cicuited, find the Power required to move the rod with velocity v= 10 cm/s

The count rate from a radiuactive sample falls from 4.0 xx 10^6 s^(-1) to 1.0 xx 10^6 s^(-1) in 20 hours.What will be the count rate 100 hours after the beginning.