Answers

2015-12-24T09:45:30+05:30
First sound is characterized by frequency and pitch.there are some terms regarding sound they are:
Frequency:The no. of vibrations per second.
Pitch:The quality of the sound.
Noise;Unpleasant sound
Wavelength;Denoted by the Greek alphabet lambda and it is the distance of how much a sound particle is displaced from it's current position.
And most of all sound cannot only travel through vacuum.
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