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Andrew [12]
3 years ago
8

If you cannot get a chair to move across the floor, it is because ___ friction opposes your push.

Physics
1 answer:
denis-greek [22]3 years ago
7 0
If you cannot get a chair to move across the floor, it is because static friction opposes your push. When you say static or kinetic friction the two object that facing each other are opposing each other. That's why you're having a hard time pushing the chair.
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Explanation:

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a tire with inner volume of 0.0250m^3 is filled with air at a gauge pressure of 36.0 psi. If the tire valve is opened to the atm
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According to Boyle's law

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5 0
3 years ago
A sound has a sound level of 30 dB. Its intensity is what multiple of the standard reference level for intensities?
arsen [322]
<h2>Answer:</h2>

1000th multiple of the standard reference level for intensities.

<h2>Explanation:</h2>

The sound intensity level (β), measured in decibels, of a sound with an intensity of I is defined as follows;

β = 10 log (I / I₀)       --------------------(i)

Where;

I₀ = reference intensity

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β = sound level = 30dB

Substitute this value into equation (i) as follows;

30 = 10 log (I / I₀)

Divide both sides by 3;

3 = log (I / I₀)

Take antilog of both sides;

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1000 = I / I₀

Solve for I;

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Therefore the intensity of the sound is 1000 times the standard reference level for intensities (I₀)

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Since his speed is constant,

B.

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