21-5 Coulomb\'s Law 10-6 C, 1 nc 10 n what is the magnitude of the electric forc

Question

21-5 Coulomb's Law 10-6 C, 1 nc 10 n what is the magnitude of the electric force of attraction between an iron nucleus (q 6e) and its innermost electron if the distance between them is 1.5 x 10-12 m? 2. (l) How many electrons make up a charge of -38.0 PC? 3. (I) What is the magnitude of the force a +25 C charge exerts on a +2.5 mC charge 28 cm away? 4. (I What is the repulsive electrical force between two protons m apart from each other in an atomic nucleus? 4.0 x 10 15 (l) en an object such as a plastic comb is charged by rubbing it cloth, the net charge is typically a few with a mic that charge is 3.0 AC, by what percentage does If charging? fi the mass of a 35-g comb change during 10-2N force of 3.2 x

Explanation / Answer

Coulomb Force = F = kq1q2/r^2

k = 9*10^9

q1 = 25*10^-6 C

q2 = 2.5*10^-3 C

r = 0.28 m

So, F = (9*10^9*25*10^-6*2.5*10^-3)/(0.28)^2 = 7174.7 N

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