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,) 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 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?

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.

In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 xx 10^10 Hz and amplitude 48 V m^-1 . Show that the average energy density of the E field equals the average energy density of the B field, [c = 3 xx 10^8 m s^-1 .]

Find the e.m.f. induced in a coil of 20 turns and cross-sectional area 0.2 m^2 , when a magnetic field perpendicular to the plane of the coil changes form 0.1 Wb m^-2 to 0.5 Wbm^-2 at a uniform rate over a period of 0.05 s.

For the reaction 2 A+B+C rarr A_2B+C The rate law has been found to be Rate = k[A] [B]^2 with k = 2.0 xx10^-6 mol^-2 L^2 s^-1 For this reaction, determine the initial rate of reaction with [A] = 0.1 mol L^-1, [B] = 0.2 mol L^-1, [C] = 0.8 mol L^-1 . Determine the rate after 0.04 mol L^-1 of A has been reacted.

For the reaction: 2A + B rarr A2B the rate = k[A][B]^2 with k = 2.0 × 10^(-6) mol^(-2) L^2 s^(-1) . Calculate the initial rate of the reaction when [A] =0.1 mol L^(-1), [B] = 0.2 mol L^(-1) . Calculate the rate of reaction after [A] is reduced to 0.06 mol L^(-1) .