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kow [346]
3 years ago
14

The low-frequency speaker of a stereo set has a surface area of and produces 1W of acoustical power. What is the intensity at th

e speaker
Physics
1 answer:
AlekseyPX3 years ago
5 0

Answer:

      I =  \frac{1}{4\pi \ r^2}

we see the intensity decreases with the inverse of the distance squared

Explanation:

Intensity is defined as power per unit area,

           I = P / A

in this case we have that the sound is emitted in a spherical form therefore the area is

           A = 4 pi r2

therefore the intensity is

          I =  \frac{1}{4\pi \ r^2}

as we see the intensity decreases with the inverse of the distance squared

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Answer:

Explanation:

solid

This type of matter is know as solid. Also, it is known that solid substances have definite shape and volume. Thus, we can conclude that a substance with a definite shape and volume is a solid phase of matter.

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5 x 10^4 N/m^2

Explanation:

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From the question, we obtained the following information;

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How much force is required to accelerate a 22Kg mass at 6 m/s?
GuDViN [60]

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Two children are riding on the edge of a merry-go-round that has a mass of 100.kg and radius of 1.60m and is rotating at 20.0rpm
Gre4nikov [31]

Here since both children and merry go round is our system and there is no torque acting on this system

So we will use angular momentum conservation in this

I_1\omega_1 = I_2\omega_2

now here we have

I_1 = \frac{MR^2}{2} + m_1R^2 + m_2R^2

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I_1 = 256

Now when children come to the position of half radius

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I_2 = \frac{MR^2}{2} + m_1(\frac{R}{2})^2 + m_2(\frac{R}{2})^2

I_2 = \frac{100(1.6)^2}{2} + (28 + 22)(0.8)^2

I_2 = 160

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olga2289 [7]

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unmmm u can say that it is going mt 15s

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