Sound Test - 5...

In which of the following materials is the speed of sound maximum?

If two men talk on the Moon's surface, then

Read the following statements and choose the correct option accordingly.

Statement A: We can produce sound by changing the pressure of the air in the instrument.
Statement B: To produce sound, we have to do a certain mechanical work.

Note is a sound

Read the following statements and choose the correct option accordingly.

Statement A: During the propagation of a sound wave, particles oscillate to and fro about their mean positions.
Statement B: For the propagation of sound, the medium should be elastic in nature.

Two sounds A and B are of frequencies f and 2f, respectively. Which of the following is correct?

Loudness of a sound is determined by the ________ of vibration.

Two sounds of same loudness and same pitch produced by two different instruments differ in their

Study the following graphs and choose the correct option.

Read the following statements and choose the correct option accordingly.

Statement A: If the length of a string is increased, the pitch of the sound will also increase.
Statement B: The pitch of the sound is independent of the length of the string.

Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the strings suitably. By doing so, he is adjusting the

Fill in the blanks:

The outer ear, called ______, receives sound from the surroundings. This sound passes to the ________ through the auditory canal. At the end of the auditory canal, there is a thin membrane called ______ or tympanic membrane. The eardrum is forced to vibrate due to pressure variations in the air. A set of bones in the middle ear amplifies these vibrations of the eardrum and forwards these to the inner ear. Then, these vibrations are converted into electrical signals by _______.

Sound waves are sent from a submarine and received back after 5 seconds. At what distance may the enemy submarine be present? (The speed of sound in water is 1500 m/.)

Arjun stands at point A, fires a shot, whose sound travels in air with a speed of 300 m/s. How long after the firing of shot will Rahul, standing at point B, hear its echo?

The wavelength, i.e. the distance between two consecutive crests or troughs of a wave is 2 m and the velocity of the wave is 440 m/s. What will be the frequency?

A source of wave produces 40 crests and 40 troughs in 0.6 seconds.

The frequency of the wave is

Eardrum vibrations are amplified several times by three bones in the middle ear. These bones are

An ear converts pressure variations in the air with audible frequencies into electrical signals and these signals travel to the brain through the ___________.

An echo returns in 0.3 s. What is the distance of the reflecting surface from the source of sound?
(Speed of sound = 344 ms^-1)

Two sound waves travelling in the same medium have time periods in the ratio 3 : 5. The ratio of their speeds is