Embibe Experts Solutions for Chapter: Sound, Exercise 1: Exercise 1

Two vibrating tuning forks produce waves given by $y_1=4\sin 500\pi t,y_2=2\sin 506\pi t$. If they are held near the ear of a person, the person will hear

The function $y\left(x, t\right)=A{e}^{-\beta \left(x-\alpha t\right)}$ (in $\mathrm{SI}$ units) represent a travelling wave. The wave speed is

Which one of the following represents a wave -

A machine gun is mounted on an armoured car moving with a speed of $20{ \mathrm{m} \mathrm{s}}^{-1}.$ The gun can point against the direction of motion of the car. The muzzle speed of the bullet is equal to the speed of sound in the air i.e., $340{ \mathrm{m} \mathrm{s}}^{-1}.$ The time difference between bullets actually reaching and the sound of firing reaching at a target $500 \mathrm{m}$ away from a car at the instant of firing is

On increasing the temperature by $1°\mathrm{C}$ of sound, its velocity increases by

If $v_{\mathrm{rms}}=$ root mean square speed of molecules,

$v_{\text{av }}=$ average speed of molecules

$v_{\mathrm{mp}}=$ most probable speed of molecules;

$v_s=$ speed of sound in a gas

Then, identify the correct relation between these speeds.

Bulk modulus of sea water should be approximately $\left({\mathrm{\rho }}_{\text{water }}=1000 \mathrm{kg} {\mathrm{m}}^{-3}\right)$ if velocity of sound in water is $1050 \mathrm{m} {\mathrm{s}}^{-1}$.

To hear the echo in $1$ second, the minimum distance of the source from the reflecting surface should be: