Answered: (a) The intensity of sound coming from… | bartleby

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1 Intensity
(a) The intensity of sound coming from a speaker 2 m away is 80 dB. How far away must you stand for the intensity to
be reduced to 40 dB?
(b) The earth has a radius of R = 6.4 × 106 m. It orbits the sun in a nearly circular orbit at an average distance of
r = 1.5 x 1011 m. The solar intensity at the upper atmosphere is 1367 W/m². How much energy does the sun
radiate per second?

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