Question

i need sound chapter notes class 9 cbse



handwritten ​

Answer 1

explain how sound is produced by your school bell

when the school bell is hit by a hammer it starts vibrating the vibrating school bell continuous to send a series of compression and rarefaction pulses in the air longitudinal wave this web of compression and rarefaction in their fault in our and cause the adverb to vibrate with their frequency producing the sensation of hearing in this way sound is produced in our school bell

why are sound waves called mechanical waves

sound waves are called mechanical waves because they required a material medium like water for their propagation