Answers are given just need to show work. HOMEWORK CHAPTER 17 1. How many electr

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Answers are given just need to show work.

HOMEWORK CHAPTER 17 1. How many electrons are in 1.0 C of charge? Ans. 6.2 x 1018 electrons 2. Two point charges of 1.0 C each are 0.01 meter apart. What is the force between them? Ans. 9.0 x 1013 N 3. Two electrons are 1.0 x 101° m apart. What is the force between them? [1010 m -1 Ängström] Ans. 2.3 x 10.3 N 4. The nucleus of an argon atom contains 18 protons. Calculate the repulsive force between two argon nuclei 1.0 x 10 m (nanometer) apart. Ans. 7.5 x 10 N 5. Two equally charged balls 0.03 m apart repel each other with a force of 4.0 x 10 N Compute the charge on each Ans. 6.3 x 1010 Coul.

Explanation / Answer

1) charge on 1 electron = 1.6*10^-19

number of electron = 1 / (1.6*10^-19) = 6.25*10^18

2) F = kq1q2 / r^2

= 9*10^9*1*1 / 0.01^2= 9*10^13 N

3) F = kq1q2 / r^2

F = 9*10^9*(1.6*10^-19)^2 / (10^-10)^2

= 2.3*10^-8 N

4) F = 9*10^9*18*18*1.6*10^-19*1.6*10^-19 / (10^-9)^2

= 7.5*10^-8 N

5) 4*10^-6 = 9*10^9*q^2 / 0.03^2

q = 6.32*10^-10 C

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