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soldi70 [24.7K]
3 years ago
7

A charge Q is transferred from an initially uncharged plastic ball to an identical ball 17 cm away. The force of attraction is t

hen 68nM .
How many electrons were transferred from one ball to the other?
Physics
1 answer:
Alecsey [184]3 years ago
5 0

Answer:

2.92 x 10¹² electrons

Explanation:

given,

distance between two plastic ball, r = 17 cm

                                      r = 0.17 m

Force of attraction = F = 68 mN

                F = 0.068 N

number of electron transferred from one ball to another.

using Coulomb Force equation

F = \dfrac{kq^2}{r^2}

0.068 = \dfrac{9\times 10^9\times q^2}{0.17^2}

q² = 2.1835 x 10⁻¹³

q = 4.67 x 10⁻⁷ C

now, number of electron

 N = \dfrac{q}{e}

e is the charge of electron which is equal to 1.6 x 10⁻¹⁹ C

  N = \dfrac{4.67\times 10^{-7}}{1.6\times 10^{-19}}

       N = 2.92 x 10¹² electrons

electrons were transferred from one ball to the other is 2.92 x 10¹²

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tino4ka555 [31]

Answer:

a)  force between them is attraction,   b)  F = 1.125 10⁻² N

Explanation:

In this case the electric force is given by Coulomb's law

          F =k \frac{q_1q_2}{r^2}

           

In the exercise they give us the values ​​of the loads

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          q2 = 5 mC = 5 10⁻³ C

           d = 20 cm = 0.20 m

let's calculate

          F = 9 10⁹ \frac{10 \ 10^{-3} \ 5 \ 10^{-3}}{0.20^2}

          F = 1.125 10⁻² N

To find the direction of the force we use that charges of the same sign repel each other, as in this case there is a positive and a negative charge, the force between them is attraction

7 0
3 years ago
PLSSSSS HELP!!!!!!! ASAP!!!!! MARK BRAINLIEST!!!!
Ymorist [56]

Answer: I would say the answer is B.

Explanation: It looks and sounds the most correct.

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3 years ago
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Kobotan [32]

Answer:

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The moment  of inertia about the center of a sphere is 2 / 5 M R^2.

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7 0
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sp2606 [1]

Answer:

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Explanation:

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A ship sets out to sail to a point 120 km due north. an unexpected storm blows the ship to a point 100 km due east of its starti
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