13. charge q1 (26.0 µC) and q2 (-47.0 µC) experienced an electrostatic force of 5.70 N between them at a distance of, а. 1.39 m b. 1.93 m с. 2.14 х 10-19 d. 1.464 x 10-8 14. How many electrons have been removed from a positively charged particle if it has a net charge of 5 x 109 C? a. 5 x 109 electrons b. 2.5 x 109 electrons c. 1x 10-8 electrons d. Incomplete information

7. Object A has a charge +1.8 x 10-6 C. Ob- ject B has a charge -1.0 x 10-6 C. They are 0.014 m apart. What is the force on A? on B?

After a glass rod is rubbed with silk, it is observed to have a net charge of +24 nC. Which of the following statements correctly describes the interaction between the silk and the rod? A. The rod transferred 1.5 x1011 electrons to the silk. B. The rod transferred 1.5 x1011 protons to the silk. C. The silk transferred 1.5 x1011 electrons to the rod. D. The silk transferred 1.5 x1011 protons to the rod.

1.  Common static electricity involves charges ranging from nanocoulombs to microcoulombs. (a) How many electrons are needed to form a charge of −9.10 nC? electrons (b) How many electrons must be removed from a neutral object to leave a net charge of 0.520 µC? electrons   2. What net charge would you place on a 412 g piece of sulfur if you put an extra electron on 1 in 1012 of its atoms? (Sulfur has an atomic mass of 32.1.)   4. What is the repulsive force between two pith balls that are 10.0 cm apart and have equal charges of −39.0 nC?-------N   6.How far apart (in mm) must two point charges of 65.0 nC (typical of static electricity) be to have a force of 5.50 N between them?     7. a.What is the direction of this force (away from or toward the +6 µC charge)? away from the +6 µC chargetoward the +6 µC charge ---------mm A test charge of +9 µC is placed halfway between a charge of +6 µC and another of +7 µC separated by 17 cm. (b) What is the magnitude of the force (in N)…