Lakhmir Singh and Manjit Kaur Solutions for Chapter: Sound, Exercise 25: Questions Based on High Order Thinking Skills (HOTS)

Draw the sketches of two waves A and B such that wave B has twice the wavelength and half the amplitude of wave A.

A device called oscillator is used to send waves along a stretched string. The string is $20 \mathrm{c}\mathrm{m}$ long, and four complete waves fit along its length when the oscillator vibrates $30$ times per second. For the waves on the string, what is their wavelength?

A device called oscillator is used to send waves along a stretched string. The string is $20 \mathrm{cm}$ long and four complete waves fit along its length when the oscillator vibrates $30$times per second. For the waves on the string, what is their frequency?

A device called oscillator is used to send waves along a stretched string. The string is $20 \mathrm{cm}$ long and four complete waves fit along its length when the oscillator vibrates $30$ times per second. For the waves on the string, what is their speed?

Through which of the following materials can sound travel?
Wood, air, water, steam, ice, hydrogen, steel, diamond.

A sound-producing body is at a considerable distance from a man. There can be four different media $W$, $X$, $Y$ and $Z$ between the sound-producing body and the man. The medium $X$ brings the sound to a man most quickly whereas medium $Z$ takes the maximum time. The time taken by medium $W$ in bringing sound to man is less than that of $X$ but more than that of $Z$. The medium $Y$, however, fails to bring the sound from the sound-producing body to the man. Which medium could be the one:

(a) having no fixed shape and no fixed volume?

(b) having a fixed volume but no fixed shape?

(c) having the same composition as that on the moon?

(d) having a fixed shape, and a fixed volume?

The longitudinal waves travel in a coiled spring at a rate of $4 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{s}$}\right.$. The distance between two consecutive compressions is $20 \mathrm{c}\mathrm{m}$. Find the wavelength of the wave.

The longitudinal waves travel in a coiled spring at a rate of $4 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{s}$}\right.$. The distance between two consecutive compressions is $20 \mathrm{cm}$. Find the frequency of the wave.