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Physics, 11.07.2019 21:40 elicollierec
Acertain siren radiates sound uniformly in all directions. at a distance of 17 m from the siren, the intensity level is 49 db. how many watts of power does this siren put out? the threshold of human hearing is 1.0 Γ 10-12 w/m2.
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Acertain siren radiates sound uniformly in all directions. at a distance of 17 m from the siren, the...
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