Which of the following are infrasonic waves?

(a)

5 kHz

(b)

25 Hz

(c)

10 Hz

(d)

15000 Hz

Speed of sound in solids does not depend upon __________.

(a)

temperature

(b)

density

(c)

medium

(d)

pressure

The back and forth motion of the object is called ___________.

(a)

Vibration

(b)

Rotation

(c)

Translation

(d)

Linear motion

A Sonar device on a submarine send out a signal and receives an echo 5 seconds later. Calculate the speed of sound it water if the distance of the object from the submarine is 3500 m.

(a)

1440 ms^-1

(b)

1460 ms^-1

(c)

1400 ms^-1

(d)

1550 ms^-1

The phenomenon of echo of sound waves is due to _____________.

(a)

Reflection

(b)

Interference

(c)

Diffraction

(d)

All of the above

A pendulum oscillates 50 times in 5 seconds. Find the time period and frequency.

What is sound? how it is produced?

What is the audible hearing range of Human being?

Calculate the (a) wavelength (b) the time period of tuning fork of frequency 540 Hz which is set to vibrate, velocity of sound in air is 330 ms^-1.

A ship on the surface of water sends a signal and receives it back after 5 seconds from a submarine inside the water. Calculate the distance of the submarine from the ship (the speed of the sound in water in 1450 ms^-1)

List the applications of sound.

Define and write SI units of Amplitude, frequency, time period, wavelength and velocity or sound.

Write any five applications of ultrasonic waves.

Find the frequency of a wave whose time period is 0.002 second.