Sound Test - 31...

In the following sentence. say 'True' and 'False'
$$(a)$$ Sound can't travel in vacuum (T/F)
$$(b)$$ The number of oscillations per second of a vibrating object is called its time period. (T/F)
$$(c)$$ If the amplitude of vibration is large, sound is feeble. (T/F)
$$(d)$$ For human ears, the audible range is 20Hz to 20,000Hz. (T/F)
$$(e)$$ The lower the frequency of vibration, the higher is the pitch.
$$(f)$$ Unwanted or unpleasant sound is termed as music. (T/F)
$$(g)$$ Noise pollution may cause partial hearing impairment. (T/F)

Rahul is playing the drums. Then which of the following characteristics of sound would result in increase in loudness?

What do you think a tabla player does to increase the pitch of the sound produced?

Which of the following statements is correct?

A bicycle wheel spins 25 times in 5 seconds. Calculate frequency of the wheel.

The maximum distance that a particle moves away from its rest position is called ________________.

Science fiction films often show battles between spaceships. Four friends were arguing what would someone in space hear if an enemy spaceship exploded?
Rekha said, 'they would hear a big explosion.'
Renu saud,'they will not hear anything as there is no medium for sound to travel, but they can see the explosion.'
Ramesh said, 'yes, they will not hear anything and they will not be able to see the explosion.'
Raghav said,'the explosion produces sound of frequency above 20,000 Hz hence we cannot hear it.' 
Who is correct?

When tuning a violin, a string is tightened. The musical note being played on the string becomes higher in pitch.

The sound from a mosquito is produced when it vibrates its wings at an average rate of $$500$$ vibrations per second. What is the time period of the vibration?

Convert the frequency $$1.492 \ Hz$$ to time period.