A speaker is playing a sound of consistent amplitude at a distance of 3.0 m from your ear. It plays the sound for 5.0 seconds. You measure the sound intensity at the location of your ear to be 1.7 x 10-7 W/m². 1 If your eardrum has a surface area of 85 mm2 (= 8.5 x 10-5 m²), how much energy is incident on your eardrum in the 5.0 seconds that the speaker is playing? Your answer should be in units of J. Express your answer in scientific notation. Type your answer... 2 If you move the speaker so that it is now 9.0 m from your ear, what will be the sound intensity at the location of your ear? Assume the sound wave being output from the speaker is a spherical wave. Your units should be W/m2, but do not include the units in the answer box. Express your answer in scientific notation.
A speaker is playing a sound of consistent amplitude at a distance of 3.0 m from your ear. It plays the sound for 5.0 seconds. You measure the sound intensity at the location of your ear to be 1.7 x 10-7 W/m². 1 If your eardrum has a surface area of 85 mm2 (= 8.5 x 10-5 m²), how much energy is incident on your eardrum in the 5.0 seconds that the speaker is playing? Your answer should be in units of J. Express your answer in scientific notation. Type your answer... 2 If you move the speaker so that it is now 9.0 m from your ear, what will be the sound intensity at the location of your ear? Assume the sound wave being output from the speaker is a spherical wave. Your units should be W/m2, but do not include the units in the answer box. Express your answer in scientific notation.
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Intensity of sound is inversely proportional to square of distance from the source
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