Embibe Experts Solutions for Chapter: Sound Waves, Exercise 7: Exercise (Analytical Questions)

Frequency of tuning fork $A$ is $256 \mathrm{Hz}$. It produces four beats per sec with tuning fork $B$. When wax is applied at tuning fork $B$, then $6 \mathrm{beats} {\sec }^{-1}$ are heard. The frequency of $B$ is,

Frequency of a tuning fork $A \text{is} 256 \mathrm{Hz}$. It produces four beats per sec with tuning fork $B$. When wax is applied at tuning fork $B$, then $6 \mathrm{beats} {\sec }^{-1}$ are heard. By reducing little amount of wax, $4 \mathrm{beats} {\sec }^{-1}$ are heard. The frequency of $B$ is,

$56$ tuning forks are so arranged in series that each fork gives $4$ beats per second with the previous one. The frequency of the last fork is three times that of the first. The frequency of the first fork is 

Two wires are fixed in a sonometer. Their tensions are in the ratio $8:1$. The lengths are in the ratio $36:35$. The diameters are in the ratio $4:1$. Densities of the materials are in the ratio $1:2$. If the higher frequency in the setting is $360 \mathrm{Hz}$, the beat frequency when the two wires sounded together is:

An underwater swimmer sends a sound signal to the surface. It produces $5 \mathrm{beats} {\sec }^{-1}$ when compared with fundamental tone of a pipe of $20 \mathrm{cm}$ length closed at one end. What is the wavelength of sound in water? (Take, $V_{\mathrm{water}}=1500 \mathrm{m} {\mathrm{s}}^{-1}\text{,} V_{\mathrm{air}}=360 \mathrm{m} {\mathrm{s}}^{-1}$.)

A cylindrical tube $\left(L=120 \mathrm{cm}\right)$ is resonant with a tuning fork of frequency $330 \mathrm{Hz}$. If it is filling by water, then to get resonance minimum length of water column is $\left(V_{\mathrm{air}}=330 \mathrm{m} {\mathrm{s}}^{-1}\right)$,

The length of a sonometer wire is either $95 \mathrm{cm} \text{or} 100 \mathrm{cm}$. In both the cases, a tuning fork produces $4$ beats. Then, the frequency of tuning fork is,

Two tuning forks have frequencies $256 \mathrm{Hz} \left(A\right) \text{and} 262 \mathrm{Hz} \left(B\right)$. Tuning fork $A$ produces some beats per second with unknown tuning fork. Same unknown tuning fork produces double beats per second from $B$ tuning fork. Then, the frequency of unknown tuning fork is,