1.

A window whose area is 2m^2opens on a street where the street noise result in an intensity level atthe window of 60 dB. If an acoustic absorber is fitted at the window, how much energy from street will it collect in five hours

Answer»

`26 xx 10^(-13) J`
`26 xx 10^(-10) J`
`36 xx 10^(-3) J`
`46 xx 10^(-10) J`

ANSWER :C


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