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Andrew [12]
3 years ago
15

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 3.5 × 10-3 W/m2. What is the total sound power P emitted by the source?
Physics
1 answer:
yaroslaw [1]3 years ago
7 0

Answer:

1.58 W

Explanation:

Since the sound spreads uniformly in all directions, it must be in a form of a circle with radius of 12 m. So the area of the circle is

A = \pi r^2 = \pi 12^2 = 452.389 m^2

From the intensity of the sound we can calculate the power at 12 m

P = AI = 452.389 * 3.5\times10^{-3} = 1.58 W

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4 0
3 years ago
How many swings would a 23 cm long pendulum make in 30 seconds?
iragen [17]

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8 0
3 years ago
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Answer:

Graph #2

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3 0
3 years ago
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pantera1 [17]

Answer:

I Guess the answer is B  

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Are those Answer choices or instructions?

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