Embibe Experts Solutions for Exercise 3: Assignment

In resonance tube two successive positions of resonance are obtained at $15 \mathrm{cm}$ and $48 \mathrm{cm}$. If the frequency of the fork is $500 \mathrm{cps}$, the velocity of sound is

Select the correct statement about the reflection and refraction of a wave at the interface between the medium $1$and $2$ the

During superposition of two waves of nearly equal frequencies, beats frequency is defined as the

A tuning fork of unknown frequency produces $4$ beats per second when sounded with another tuning fork of frequency $254 \mathrm{Hz}$. It gives the same number of beats per second when unknown tuning fork loaded with wax. The unknown frequency before loading with wax is

The displacement at a point due to two waves are $y_1=4\sin \left(500\pi t\right)$ and $y_2=2\sin \left(506\pi t\right)$. The result due to their superposition will be

A tuning fork vibrating with a sonometer having a wire of length $20 \mathrm{cm}$ produces $5$ beats per second. The beats frequency does not change if the length of the wire is changed to $21 \mathrm{cm}$. The frequency of the tuning fork must be

A man standing on a platform observes that the frequency of the sound of a whistle emitted by a train drops by $140 \mathrm{Hz}$. If the velocity of sound in air is $330 \mathrm{m} {\mathrm{s}}^{-1}$ and the speed of the train is $70 \mathrm{m} {\mathrm{s}}^{-1}$, the frequency of the whistle is

An observer is approaching with a speed $v$, towards a stationary source emitting sound waves of wavelength ${\lambda }_0$. The wavelength shift detected by the observer is (Take $c=$ speed of sound)