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and in ur 3rd post i can provide u the explanation which is of course a proof.
u nudge me i will give u the expalnation

i mean 2nd post on this page

i think anil u r wrong in ur second post to this site
frequency depends on the source and not on the medium or tjhe properties of the medium

thanu bipin sir
this site is of various other uses too

why does bulk modulus of a gas depends on the process the gas has undergone?

is there any proof along with ur explanation

is natural frequency of a string the one by which standing waves are formed in the string.???????

also,do normal mode of a string mean its natural frequency????????????

is there any proof to :
centroid of a triangle divides the median in the ratio
2:1