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College Physics

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A vacuum cleaner has a measured sound level of 75.7 dB. What is the intensity of this sound? Answer in units of W/m^2

  • College Physics -

    B=75.7 dB
    I=1x10^-2 W/m^2

    B=10 log (I/I°)
    I=I°10^3/10=(1x10^-2 W/m^2) 10^7.57
    =3.71535x10^-5 W/m^2

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