Solution Found!
Answer: Threshold of Pain. You are investigating the
Chapter 15, Problem 26E(choose chapter or problem)
Threshold of Pain. You are investigating the report of a UFO landing in an isolated portion of New Mexico, and you encounter a strange object that is radiating sound waves uniformly in all directions. Assume that the sound comes from a point source and that you can ignore reflections. You are slowly walking toward the source. When you are 7.5 m from it, you measure its intensity to be \(0.11\mathrm{\ W}/\mathrm{m}^2\). An intensity of \(1.0\mathrm{\ W}/\mathrm{m}^2\) is often used as the “threshold of pain.” How much closer to the source can you move before the sound intensity reaches this threshold?
Questions & Answers
QUESTION:
Threshold of Pain. You are investigating the report of a UFO landing in an isolated portion of New Mexico, and you encounter a strange object that is radiating sound waves uniformly in all directions. Assume that the sound comes from a point source and that you can ignore reflections. You are slowly walking toward the source. When you are 7.5 m from it, you measure its intensity to be \(0.11\mathrm{\ W}/\mathrm{m}^2\). An intensity of \(1.0\mathrm{\ W}/\mathrm{m}^2\) is often used as the “threshold of pain.” How much closer to the source can you move before the sound intensity reaches this threshold?
ANSWER:Solution 26E
Step 1:
Initial Intensity
Final Intensity
Initial Radius
Final Radius