Propagation of Sound

Draw the displacement-time graph of a longitudinal wave.

Draw the displacement-distance graph of a longitudinal wave.

What you mean by wave motion?

What is the relation between wave speed, time period and wavelength?

A progressive wave is represented by the equation $y=2\sin 2\pi \left(\frac{t}{0.01}-\frac{x}{30}\right)$ where $x$ and $y$ are in centimetre and $t$ is in seconds. What is the frequency of the wave?

Density of particles in a given medium is not proportional to the pressure.

Describe the pressure and density in the low pressure area.

The region of low pressure area in the medium is called compression.

Define the region of low pressure area in the medium.

The region of low pressure area in a sound wave is called _____.

Density of particles in a given medium is proportional to the pressure.

Differentiate between the high pressure and low pressure area in a medium.

The region of high pressure area in the medium is called rarefaction.

Define the region of high pressure area in the medium.

The region of high pressure area in a sound wave is called _____.

A _____ source can produce sound.

(Choose from: rotating/vibrating)

If a sound wave travels with a frequency of $1.25 \times {10}^4 \mathrm{Hz}$ at $344 \mathrm{m} {\mathrm{s}}^{-1}$, the wavelength will be -

Two observers are stationed in two boats $4.5 \mathrm{km}$ apart. After how many seconds a sound signal sent by one, under water, reaches the other? (The speed of sound in the water is $1500 \mathrm{m} {\mathrm{s}}^{-1}$).

What will be the wavelength (in meters) of sound having $1655 \mathrm{Hz}$ as its frequency, when it travels with a speed of $331 \mathrm{m} {\mathrm{s}}^{-1}$? (Answer upto one decimal place).

Suppose that a sound wave and a light wave have the same frequency, then their wavelengths will be the same.