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2 years ago

5

Which statement is TRUE concerning the particle arrangement of a solid? A) the particles have no definite shape B) the particles

have an undefined volume C) the particles are closely packed together D) particles can only exist at extremely high temperatures

2 answers:

Anarel [89]2 years ago

8 0

C is the correct answer.

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Mazyrski [523]2 years ago

5 0

C is the correct answer

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For most people, getting 8 to 9 hours of sleep increases concentration, improves physical health, and improves one's mood.

olga2289 [7]

That statement is true

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A deviant person would behave in a culturally unacceptable

aivan3 [116]

Answer:

True

Explanation:

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2 years ago

What is the average velocity of a car if it travels from position 25m to a position of -7m in 34 seconds?

zubka84 [21]

Answer:

vp = 0.94 m/s

Explanation

Formula

Vp = position/ time

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Position = 25 m - (-7 m) = 25 m + 7 m = 32 m

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Vp = 32 m / 34 seconds

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What is the intensity of a sound with a sound intensity level (SIL) 67 dB, in units of W/m^2?

vfiekz [6]

Answer:

The intensity of sound (I) = 3.16 x 10⁻⁶ W/m²

Explanation:

We have expression for sound intensity level (SIL),

$L=10log_{10}\left ( \frac{I}{I_0}\right )$

Here we need to find the intensity of sound (I).

$L=10log_{10}\left ( \frac{I}{I_0}\right )\\\\log_{10}\left ( \frac{I}{I_0}\right )=0.1L\\\\\frac{I}{I_0}=10^{0.1L}\\\\I=I_010^{0.1L}$

Substituting

L = 67 dB and I₀ = 10⁻¹² W/m² in the equation

$I=I_010^{0.1L}=10^{-12}\times 10^{0.1\times 65}\\\\I_0=10^{-12}\times 10^{6.5}=10^{-5.5}=3.16\times 10^{-6}W/m^2$

The intensity of sound (I) = 3.16 x 10⁻⁶ W/m²

8 0

2 years ago