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Sedbober [7]
3 years ago
8

The sound level of one person talking at a certain distance from you is 80 dB. If she is joined by 2 more friends, and all of th

em are talking (incoherently) at the same time as loudly as she is, what sound level are you being exposed to? a)
Physics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

Explanation:

sound level scale is logarithmic which is given by the following formula

L = 10 log I / I₀ where I₀ = 10⁻¹² W / m² s

80 = 10 log I / 10⁻¹²

8 = log I / 10⁻¹²

I / 10⁻¹² = 10⁸

I = 10⁻⁴ W / m² .s

for three person the intensity becomes three times ie

3 x 10⁻⁴

L = 10 log 3 x 10⁻⁴ / 10⁻¹²

= 10 log 3 x 10⁸

= 10 ( 8 + log 3 )

= 10 ( 8 + .477 )

= 84.77 dB .

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aksik [14]

Answer:

Virtual image

Explanation:

Virtual image is formed whenever the rays of an object diverges

4 0
3 years ago
You need to produce a solenoid that has an inductance of 2.47 μh . you construct the solenoid by uniformly winding 1.15 m of thi
Neporo4naja [7]

Answer:

0.0170m or 1.70cm

Explanation:

L=(μ₀*N^2*A)/(l)

N=x/2*pi*r so r=x/2*pi*N

A=pi*r^2=(pi*x^2)/(4*pi^2*N^2)

L=(μ₀*N^2*A)/(l)=(μ₀*N^2*pi*x^2)/(4*pi^2*N^2*l)=(μ₀*x^2)/(4*pi*l)

l=(μ₀*x^2)/4*pi*L)=[(4*10^-7)*(1.15m)/4*pi*2.47*10^-6H)=0.0170m or 1.70cm

Hope this helps. Any questions please feel free to ask. Thanks!

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3 years ago
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nirvana33 [79]
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3 years ago
1. Explique con sus palabras por qué el ser humano al nacer es un organismo inacabado, y que influencia ejercen en él las caract
Vlad [161]

Answer:

Todo ser humano, al nacer, es un organismo inacabado en términos tanto físicos como psicoemocionales. Es decir, el humano, al nacer, lo hace sin la posibilidad de autosustentarse en el futuro inmediato: no puede caminar, expresarse, tener pensamiento analítico ni la capacidad de resolver las problemáticas que les afectan.

Ello hace que el humano requiera para su desarrollo de un acompañamiento absoluto por parte de su madre en el período inicial de su vida, tanto para alimentarlo como para transmitirle las nociones básicas de supervivencia; y posteriormente requiera de un entorno social idóneo que le permita desarrollarse emocionalmente para poder vivir normalmente en sociedad.

Además, respecto de sus características físicas, necesita también aprender a caminar, movilizarse y demás atributos físicos que le garanticen un normal desarrollo motor, con lo cual es fundamental que dicha enseñanza provenga también del entorno que lo rodea.

7 0
3 years ago
What is the area of a circle of radius 14.37 meters (to the correct number of significant figures)?
chubhunter [2.5K]

Answer:

Area = 648.9 m²

Explanation:

Given that, the radius of the circle = 14.37 m

The formula for the area of the circle is shown below:

Area\ of\ the\ circle=\pi\times r^2

Thus, applying the values in the above formula as ;

Area=\pi\times {14.37}^2\ m^2

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<u>Area = 648.9 m²</u>

5 0
3 years ago
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