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3 years ago

8

A single sports fan is capable of yelling at an intensity level of 80 dB from a given distance. If 10,000 similar fans were all

yelling from the same distance, which of the following would be closest to the observed intensity level?
A. 84 dB
B. 120 dB
C. 160 dB
D. 320 dB

2 answers:

riadik2000 [5.3K]3 years ago

4 0

Answer: option "A" is correct

Explanation: the closet to understand the intensity level will be from 80db (decibels) upwards. So option a which is 84db is the answer. Thank you.

LenaWriter [7]3 years ago

3 0

Answer:

= 120dB

Explanation:

The Intensity level

$L = 10 Log \frac{I_1}{I_0}$ for sigle fan

so,

$I_1 = 10^8I_0$ single fan intensity

Now intensity for 10000 fan

$= 10^4 \times I_1 \\= 10^4 \times 10^8\\= 10^1^2I_0$

Intensity level

L = $10log\frac{I_1}{I_0}$

$L = 10log \frac{10^1^2I_0}{I_0}$

L = 120dB

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baherus [9]

${\mathfrak{\underline{\purple{\:\:\: Given:-\:\:\:}}}} \\ \\$

$\:\:\:\:\bullet\:\:\:\sf{Mass \ of \ the \ body \ (m) = 40 \ kg}$

$\:\:\:\:\bullet\:\:\:\sf{Final \ velocity \ of \ the \ body \ (v) = 20 \ m/s}$

$\:\:\:\:\bullet\:\:\:\sf{Initial \ velocity \ of \ the \ body \ (u) = 0}$

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${\mathfrak{\underline{\purple{\:\:\:To \:Find:-\:\:\:}}}} \\ \\$

$\:\:\:\:\bullet\:\:\:\sf{Force \ exerted \ by \ the \ body \ ( F)}$

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${\mathfrak{\underline{\purple{\:\:\: Solution:-\:\:\:}}}} \\ \\$

☯ <u>Using 1st equation of motion </u>

$\\$

$\dashrightarrow\:\: \sf{v = u + at}$

$\\$

$\dashrightarrow\:\: \sf{20 = 0 + a(4)}$

$\\$

$\dashrightarrow\:\: \sf{20 = 4a}$

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$\dashrightarrow\:\: \sf{\dfrac{\cancel{20}}{\cancel{4}} = a}$

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$\dashrightarrow\:\: \sf{a = 5}$

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☯ <u>Now, Finding the force exerted </u>

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$\dashrightarrow\:\: \sf{F = ma}$

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GalinKa [24]

Answer:

The answer is false

Explanation:

Though the mostly used SI unit of measurement or the most popular units are the

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Aside all the above stated units for measurements there are other four basic units which are itemized bellow.

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andrey2020 [161]

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32=ω×0.42

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Pepsi [2]

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In this problem, we have an object travelling at constant speed in a circular path. The fact that the trajectory of the object is circular means that the direction of motion of the object is constantly changing: this means that its velocity is changing, so it has an acceleration. And therefore, a net force is acting on it. The force that keeps the object travelling in the circular path is called centripetal force, and it is directed towards the center of the circle (because it prevents the object from continuing its motion straight away).

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