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bonufazy [111]
2 years ago
7

According to Coulomb's Law, if the distance between the nucleus and electron were doubled, the force would be__. A. 1/4 as much.

. . B. 1/2 as much.. . C. two times as much.. . D. four times as much.
Physics
1 answer:
Naya [18.7K]2 years ago
3 0
The answer is <span>A. 1/4 as much.

</span>

To calculate this, we will use Coulomb's Law:

F = k*Q1*Q2/r²

<span>where F is repulsive force, k is constant, Q is charge, r is distance between charges.</span>


k = 5.0 × 10⁹  N*m/C²

<span><span> <span> <span> <span> </span></span> </span></span> </span>

Let's take one example where:

Q1 = Q2 = 1.2 × 10⁻⁶ C²

r₁ = 0.5 m

So, F1 = k*Q1*Q2/r₁² = 5.0 × 10⁹ * 1.2 × 10⁻⁶ * 1.2 × 10⁻⁶ /0.5² = 12.96 × 10⁻²/0.25 = 51.84 × 10⁻² = 0.5184 ≈ 0.52


Let's now double r:

r₂ = 2r₁ = 2*0.5 = 1

And let's calculate force:

F2 = k*Q1*Q2/r₂² = 5.0 × 10⁹ * 1.2 × 10⁻⁶ * 1.2 × 10⁻⁶ /1² = 12.96 × 10⁻²/1 = 12.96 × 10⁻² = 0.1296 ≈ 0.13


And now, let's see how much is the second force (F2) differ from the first force (F1):
F2/F1 = 0.13/0.52 = 1/4

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