Sounds Waves And Motion - Study Mode
[#261] Which of the following is the unit of perceived loudness of sound?
Correct Answer
(A) Decibel
[#262] For humans, the audible waves are those that:
Correct Answer
(C) have the frequency range between 20 Hz to 20000 Hz
[#263] If the distance between a crest and its consecutive trough for a sound wave is L, then its wavelength is given by
Correct Answer
(B) 2L
[#264] Velocity of sound in air 1. Decreases with temperature 2. Increases with temperature 3. Increases with pressure 4. Is independent of pressure which of the above the true?
Correct Answer
(C) 2 and 4
[#265] Velocity of sound in air does not change with the change of
Correct Answer
(B) pressure of air