Sounds Waves And Motion - Study Mode

[#266] The frequency of a sound wave is 50 Hz and its wavelength is 4 meters. What is the speed of sound wave?
Correct Answer

(A) 200 m/s

[#267] A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is
Correct Answer

(C) of higher pitch when train arrives

[#268] Which one of the following is the effect of the flight of supersonic jet?
Correct Answer

(C) Depletion in ozone layer

[#269] Echoes may be heard more than once due to successive or multiple:
Correct Answer

(B) reflection

[#270] Visible radiation was discovered by:
Correct Answer

(C) Isaac Newton