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OpenStudy (anonymous):
Jim halves the distance between himself and a sound source. What is the change in decibels of the sound he hears? (Points : 3) 6 dB 2 dB +2 dB +6 dB
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OpenStudy (anonymous):
\[I_{2} = I_{1}×(\frac {r_{1}}{r_{2}})^{2}\]
OpenStudy (anonymous):
@chrismoon how?
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