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Physics, 30.08.2019 23:30 blakeesteigmanoxd9bd

Asiren produces a 12,300 hz frequency and an intensity of 2.8x10^-6 w/m^2 at a distance of 10 m. what is the speed of the sound produced by the siren in the at a temp of 25°c?
what is the intensity level in db, at a distance of 10 m from the source?
what would be the intensity and the intensity level at a distance of 1x10^2 m from the siren?
what would be the observed frequency of the siren if the source was approaching the observer at a speed of 40 m/s?

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Asiren produces a 12,300 hz frequency and an intensity of 2.8x10^-6 w/m^2 at a distance of 10 m. wha...
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