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Maslowich
4 years ago
5

Why Are Electrons Spread Around In An Atom?

Physics
1 answer:
sveta [45]4 years ago
7 0
The electrons in an atom orbit around the nucleus, a bit like planets around a sun. Because electrons are negatively charged, and the center of the atom is positively charged, and because opposites attract, the nucleus of the atom keeps the electrons coming back. The electrons are not always evenly spread around the atom (you'll learn about this in high school chem and physics), but they are always orbiting.
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. The earth revolves around the sun in the counterclockwise direction, completing one full revolution about every 365 days. In r
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Explanation:

The earth makes in  365 day 1 revolution

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n = 1 / 365 per day .

n is called frequency of revolutions .

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= .0172 radian / day

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Read 2 more answers
The resistance, R, of a wire varies directly as its length and inversely as the square of its diameter. If the resistance of a w
lbvjy [14]

R is proportional to the length of the wire:

R ∝ length

R is also proportional to the inverse square of the diameter:

R ∝ 1/diameter²

The resistance of a wire 2700ft long with a diameter of 0.26in is 9850Ω. Now let's change the shape of the wire, adding and subtracting material as we go along, such that the wire is now 2800ft and has a diameter of 0.1in.

Calculate the scale factor due to the changed length:

k₁ = 2800/2700 = 1.037

Scale factor due to changed diameter:

k₂ = 1/(0.1/0.26)² = 6.76

Multiply the original resistance by these factors to get the new resistance:

R = R₀k₁k₂

R₀ = 9850Ω, k₁ = 1.037, k₂ = 6.76

R = 9850(1.037)(6.76)

R = 69049.682Ω

Round to the nearest hundredth:

R = 69049.68Ω

8 0
3 years ago
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