Sound Test - 69...

The wavelength of waves produced on the surface of water is 20 cm. If the wave velocity is 24 m $$s^{-1}$$, calculate the time in which one wave is produced ?

A man pronounces $$a,\space b, \space c, \space d$$ and $$e$$ and hears last four syllables as an echo. Taking velocity of sound as $$340\space ms^{-1}$$, the distance of reflecting surface, if it takes one-fifth of a second to pronounce or hear one syllable is

A person is in front of a vertical mountain fires a bullet and hears its echo after a time 3 s. The person walks a distance 'd' towards mountain then fires another bullet and hears its echo after a time 2 s. If velocity of sound in air is 340 ms$$^{-1}$$, the value of 'd' is

Identify the longitudinal waves from the following

The loudness of sound decreases with an:
$$(1)$$ Increase in the distance between the ear and the source
$$(2)$$ Decrease in the amplitude of the vibrating body
$$(3)$$ Increase in frequency of sound
$$(4)$$ Decrease in frequency

Which of the following is/are correct statement(s)?
(1) Besides helping in finding the distance of an object, SONAR also indicates its direction and speed.

When a tuning fork produces sound waves in air, which one of the following is the same in the material of tuning fork as well as in air ?

Wavelength of the light frequency $$100Hz$$ is _________.

Which of the following is NOT an application of ultrasound waves?

When a tuning fork is striked using a rubber prong, the compressions and rarefactions in the sound wave correspond to