Question

a stone is dropped from a height of 19.6 m . find time after which splash of sound will be heard . take speed of sound in air as 330m/s

Answer 1

the time to be dropped is t
we know h= 1/2 gt^2 ( when u is 0)
so t will be 2 s
if the velocity if Sound is v
then t=d/v
=0.5933s
so the over all time is ( 2+0.05939)=2.05939s
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