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Lady_Fox [76]
3 years ago
9

How is the density of a material determined?

Physics
1 answer:
Nadusha1986 [10]3 years ago
7 0
Density=mass/volume

can't be any simpler
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You are trying to overhear a juicy conversation, but from your distance of 20.0 m , it sounds like only an average whisper of 30
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Answer:

r₂ = 0.2 m

Explanation:

given,

distance = 20 m

sound of average whisper = 30 dB

distance moved closer = ?

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using formula

\beta = 10 log(\dfrac{I_1}{I_0})

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now,

30 = 10 log(\dfrac{I_1}{10^{-12}})

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80 = 10 log(\dfrac{I_2}{10^{-12}})

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I_2= 10^{-4}\ W/m^2

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10^{-4}=\dfrac{r_2^2}{20^2}

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What occurs when salt is evenly mixed with water
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