Answers

2015-08-11T22:43:27+05:30

sound is a form of energy,which travels through a medium such as air ,water in the form of waves and can be heared by ears is known as sound.

sound is produced by the vibratory bodies

0
sound is a form of energy, which causes hearing and it is produced due to a vibration of hearing
can you answer my PET
polythylene Terephthalate