Two People Are Talking at a Distance of 3

question 42

Multiple Choice

Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10^-7 W/m².Another student is 4.0 m away from the talkers.What sound intensity does the other student measure? Assume that the sound spreads out uniformly and undergoes no significant reflections or absorption.

• A) 6.2 × 10^-8 W/m²
• B) 1.5 × 10^-7 W/m²
• C) 8.3 × 10^-8 W/m²
• D) 7.8 × 10^-7 W/m²
• E) 2.5 × 10^-8 W/m²

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