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Jlenok [28]
2 years ago
10

If the intensity level by 15 identical engines in a garage is 100 dB, what is the intensity level generated by each one of these

engines?
a) 44 dB
b) 67 dB
c) 13 dB
d) 88 dB
Physics
1 answer:
insens350 [35]2 years ago
5 0

To develop this problem it is necessary to apply the concepts related to Sound Intensity.

By definition the intensity is given by the equation

\beta = 10Log(\frac{I}{I_0})

Where,

I = Intensity of Sound

I_0= Intensity of Reference

At this case we have that 15 engines produces 15 times the reference intensity, that is

I= 15I_0

And the total mutual intensity is 100 dB, so we should

\beta = 100-10*log(\frac{15I_0}{I_0})

\beta = 100-10*log(15)

\beta = 100-11.76

\beta = 88.23dB

Therefore each one of these engines produce D. 88dB.

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beks73 [17]

Answer:

80% (Eighty percent)

Explanation:

The material has a refractive index (n) of 1.25

Speed of light in a vacuum (c) is 2.99792458 x 10⁸  m/s

We can find the speed of light in the material (v) using the relationship

n = c/v, similarly

v = c/n

therefore v = 2.99792458 x 10⁸  m/s ÷ (1.25) = 239 833 966 m/s

v = 239 833 966 m/s

Therefore the percentage of the speed of light in a vacuum that is the speed of light in the material can be calculated as

(v/c) × 100 = (1/n) × 100 = (1/1.25) × 100 = 0.8 × 100 = 80%

Therefore speed of light in the material (v) is eighty percent of the speed of light in the vacuum (c)

3 0
2 years ago
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If there is a potential difference v between the metal and the detector, what is the minimum energy emin that an electron must h
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The electrical potential energy of a charge q located at a point at potential V is given by
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In our problem, the electron (charge e) must travel across a potential difference V. So the energy it will lose traveling from the metal to the detector will be equal to 
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Therefore, if we want the electron to reach the detector, the minimum energy the electron must have is exactly equal to the energy it loses moving from the metal to the detector:
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Hydrogen peroxide is sold commercially as an aqueous solution in brown bottles to protect it from light. Calculate the longest w
snow_lady [41]

Explanation:

Below is an attachment containing the solution

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The frequency of the radio wave is:
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The wavelength of an electromagnetic wave is related to its frequency by the relationship
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An athlete stretches a spring an extra 40.0 cm beyond its initial length. how much energy has he transferred to the spring, if t
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The energy transferred to the spring is given by:
U= \frac{1}{2}kx^2
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so now we can use these data inside the equation ,to find the energy transferred to the spring:
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