Sunil Batra Solutions for Chapter: Sound, Exercise 5: Summative Assessment

A sound wave travels at a speed  of $339 \mathrm{m} {\mathrm{s}}^{-1}$. If its wavelength is $1.5 \mathrm{cm}$, what is the frequency of wave.

$20$ waves pass through a point in $2$ seconds. If the distance between one crest and adjacent trough is $1.5 \mathrm{m}$, calculate the wavelength.

Which characteristic of sound helps to identify your friend by his voice while sitting with others in a dark room?

A body is vibrating $6000$times in one minute. If the velocity of sound in air is $360 \mathrm{m} {\mathrm{s}}^{-1}$. Find wavelength of the wave produced. 

Waves of frequency $200 \mathrm{Hz}$ are produced in a string as shown in figure:

Find wavelength of wave.

Waves of frequency $200 \mathrm{Hz}$ are produced in a string as shown in figure:

Find velocity of wave.

A radar signal is reflected by an aeroplane and is received $2\times {10}^{-5} \mathrm{s}$, after it was sent. If the speed of these waves are $3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$, how far is the aeroplane?

Calculate the wavelength of a sound wave whose frequency is $220 \mathrm{Hz}$ and the speed is $440 \mathrm{m} {\mathrm{s}}^{-1}$ in a given medium.