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kiruha [24]
3 years ago
10

You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the s

ound? It reduces to a. one-fourth its original value. b. one-eighth its original value. c. one-sixteenth its original value. d. none of the above
Physics
1 answer:
34kurt3 years ago
8 0

Answer:

a. one-fourth its original value.

Explanation:

Sound is threated as a spherical wave. The intensity of the sound is inversely proportional to the area of ​​the wavefront (4\pi r^2). Therefore, it is inversely proportional to the square of the distance (r) to the sound source. So, if you double your distance, the intensity of the sound reduces to one-fourth its original value.

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Answer:

a)   E_{L} = -360 V , b)      t = 3 s

Explanation:

The electromotive force in an inductor is

           E_{L} = - L dI/ dt

in the exercise they give us the relation of i (t)

            i (t) = 1.00 t² -6.00t

we carry out the derivative and substitute

          E_{L} = - L (2.00 2t - 6.00 1)

a) the electromotive force at t = 1.00 s

          E_{L} = - 90.0 (4.00 1 - 6.00)

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b) for t = 4 s

         E_{L}= - 90 (2 4 2 - 6 4)

         E_{L} = - 720 V

c) for the induced electromotive force to zero, the amount between paracentesis must be zero

           (2.00 t2 - 6.00t) = 0

            t (2.0 t-6.00) = 0

the solutions of this equation are

            t = 0

            2 t -6 = 0

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to have a different solution the trivial (all zero) we must total t = 3 s

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4 years ago
an electromagnetic plane wave travels through some transparent medium and consists of electric and magnetic fields given by
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Wave length(K) = 1.3*10^{7} rad/m

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wavelength = \frac{2π}{1.37*10^7}

wavelength = 4.584*10^{-7}/m^{-1}

wavelength = 4.58*10^{-7} m

What is wavelength?

The distance over which a periodic wave's shape repeats is known as the wavelength in physics. It is a property of both traveling waves and standing waves as well as other spatial wave patterns. It is the distance between two successive corresponding locations of the same phase on the wave, such as two nearby crests, troughs, or zero crossings. The spatial frequency is the reciprocal of wavelength. The Greek letter lambda () is frequently used to represent wavelength. The term wavelength is also occasionally used to refer to modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.

Learn more about wavelength with the help of given link:

brainly.com/app/ask?q=What+is+wavelength%3F

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5 0
1 year ago
Air in the amount of 2 lbm is contained in a well-insulated, rigid vessel equipped with a stirring paddle wheel. The initial sta
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Explanation:

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Also,   W_{in} = \Delta U

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According to the ideal gas equation,

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Putting the values into the above equation as follows.

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From table A-2E_{a}

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Now, we will substitute the energy balance as follows.

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Thus, we can conclude that final temperature of air is 59.3 Btu.

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The relevant equation we can use in this problem is:

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