A source emits sound waves equally in all directions. The intensity of the waves 2.50 m...
By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 2.9 times 10^-2 W/m^2 at a distance of 4.7 m from the source. What is the intensity at a distance of 3.0 m from the source? Express your answer using two significant figures. How much sound energy does the source emit in one hour if its power output remains constant? Express your answer using two significant figures.
A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 3.3 × 10-3 W/m2. What is the total sound power P emitted by the source?
A speaker at an open-air concert emits 600 W of sound power, radiated equally in all directions. A.)What is the intensity of the sound 4.50 m from of the speaker? B.) What sound intensity level would you experience there if you did not have any protection for your ears? c.)Earplugs you can buy in the drugstore have a noise reduction rating of 23 decibels. If you are wearing those earplugs, but your friend Phil is not, how far from the...
A stereo speaker (considered a small source) emits sound waves with a power output of 22.4 W. (Assume that the sound is emitted uniformly in all directions from the speaker.) a) Find the intensity 10.5 m from the source. b) Find the intensity level, in decibels, at this distance. c) At what distance would you experience the sound at the threshold of pain, 120 dB?
A point source emits 30.0 W of sound isotropically (in all directions). A small microphone with an area of 0.750 cm2 is located 200 m away from the source. (a) Find the sound intensity at the location of the microphone in W/m2 . (b) Find the power intercepted by the microphone. (c) Find the displacement amplitude sm of the sound wave at the position of the microphone taking the frequency of the sound to be 50.0 Hz.
2 parts thx :) 1. A point source emits sound waves isotropically. A sound meter measures a sound level of 51 dB at location C and a sound level of 48.47 at location D, a distance of 16 m from location C. The two locations C and D and the point source are all located along the same line. How far from location C is the point source? Give your answer in m, though enter only the numerical part in...
A light source emits EM waves of 4.00 W total power uniformly in all directions. Assume the wave have a single frequency (monochromatic) a) What is the intensity of the waves at 2.00 m from the light source? b) What iw the electric eld amplitude Eo produced at 2.00 m from the light source?
Two sources of sound are located on the x axis, and each emits power uniformly in all directions. There are no reflections. One source is positioned at the origin and the other at x = +116 m. The source at the origin emits four times as much power as the other source. Where on the x axis are the two sounds equal in intensity? Note that there are two answers. xbetween the sources = xnot between the sources = Please...
A loudspeaker on a tall pole broadcasts sound waves equally in all directions. What is the speaker’s power output if the sound intensity level is 103 dB at a distance of 18 m ? Express your answer to two significant figures and include the appropriate units. AND: A circular wave travels outward from the origin. At one instant of time, the phase at r1 = 14.0 cm is 0rad and the phase at r2 = 72.0 cm is 3πrad. What...
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 3.2 *10-3 W/m2. At a position twice as far from the motor, calculate the following: (a) the sound intensity in W/m2 (b) the sound intensity level relative to the threshold of hearing