11. In a ________ the wave particles of the medium vibrate in a direction perpendicular to the direction of wave propagation
12. Which of the following is the unit of perceived loudness of sound ?
13. The component used for tuning a radio is basically a variable
14. A wave with high amplitude have
15. A standing wave occurs when
16. The wavelength of a wave is the distance between
17. Longitudinal waves cannot travel through
18. Flight Recorder is technically called :
19. A gradual increase in loudness is known as
20. Which of the following property of sound is affected by change in air temperature?
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