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**1. Homework Statement**

Two small plastic spheres are given positive electrical charges. When they are a distance of 14.2cm apart, the repulsive force between them has a magnitude of 0.220 N.

Two small plastic spheres are given positive electrical charges. When they are a distance of 14.2cm apart, the repulsive force between them has a magnitude of 0.220 N.

A. What is the charge on each sphere if the two charges are equal? Ans: 7.02X10^-7

B. What is the charge on first sphere if it has four times the charge of the other?

C. What is the charge on the second sphere?

**2. Homework Equations**

Coulomb's Law --> F=kQ1Q2/r^2

Coulomb's Law --> F=kQ1Q2/r^2

**3. The Attempt at a Solution**

Already solved part A. Having trouble with part b. Both have a charge of 7.02X10^-7 C. The second question says if one sphere is 4 times the other, what is the charge. Wouldn't that just be 4 multiplied by 7.02X10^-7? Thats what I did, and its wrong.

Already solved part A. Having trouble with part b. Both have a charge of 7.02X10^-7 C. The second question says if one sphere is 4 times the other, what is the charge. Wouldn't that just be 4 multiplied by 7.02X10^-7? Thats what I did, and its wrong.