Solution: A speaker is emitting energy in the form of sound, at a rate of 200 J every second. If you were 15 m from the speaker, and your ear was pointing directly to the speaker (so sound waves enter directly into your ear canal), how much "sound-energy" (energy in the form of sound) enters your ear canal per second? Assume your ear canal is cylindrical with a diameter of 0.7 cm.

Problem

A speaker is emitting energy in the form of sound, at a rate of 200 J every second. If you were 15 m from the speaker, and your ear was pointing directly to the speaker (so sound waves enter directly into your ear canal), how much "sound-energy" (energy in the form of sound) enters your ear canal per second? Assume your ear canal is cylindrical with a diameter of 0.7 cm.