A P Shreelatha and Neetu Singh Solutions for Chapter: Sound, Exercise 3: EXERCISES

What is the speed of sound in air at $0°\mathrm{C}$? ($330 \mathrm{m}/\mathrm{s}$ or $3\times {10}^8 \mathrm{m}/\mathrm{s}$)

What is the product of frequency and wavelength called?

(Choose from the following: Amplitude of a wave/ Speed of a wave/ Pitch of a wave)

In what form of wave motion does sound travel in air?
(Transverse wave / Longitudinal wave)

The shortest wavelength of the ultrasonic waves that a bat emits is approximately $3.32 \mathrm{mm}$ at $0°\mathrm{C}$. What is the frequency of these waves? Velocity of sound in air at $0°C = 332 \mathrm{m}/\mathrm{s}$ 
 

What are ultrasonic waves? Write down their applications and properties.

What are practical applications of reflection of sound?

Show that sound needs a medium to travel from one place to another.

Explain applications of ultrasound.