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oneicyahdaley10
23.08.2019 •
Physics
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 = +78.0 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.
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Ответ:
The intensity is same at
and at ![x_{2}=52.0m](/tpl/images/0189/3699/91c45.png)
Explanation:
Let the 2 sources have the same intensity at a distance 'x' from the origin
Since the energy of the wave front emitted will be distributed over a sphere we have
For source 1, located at origin intensity at a distance of 'x' from origin is given by
For source 2, located at x = +78.0 m intensity at a distance of 'x' from origin is given by
Now it is also given that![P_{1}=4P_{2}](/tpl/images/0189/3699/f39f7.png)
Thus equating the intensities we get
Solving the equation for x we get
Solving using both the values we get
Similarly the other value is obtained as
Ответ:
set up transformer at least i think ??
Explanation: