HW01(1) - Physics 201 Homework Set 01 CHAPTER 21 Electric...

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Physics 201 Homework Set 01 CHAPTER 21: Electric Charge & Field 21[6, 8, 13, 17, 27, 42, 56*, 63, 100, 88] *Problems are Optional 1 21–5 Coulomb’s Law 3 6 9 1mC 10 C, 1 C 10 C, 1nC 10 C . µ = = = - - 6. (II) Two charged dust particles exert a force of 3.2×10 -2 N on each other. What will be the force if they are moved so they are only one-eighth as far apart? 7. (II) Two charged spheres are 8.45 cm apart. They are moved, and the force on each of them is found to have been tripled. How far apart are they now? 8. (II) A person scuffing her feet on a wool rug on a dry day accumulates a net charge of −46 µ C. How many excess electrons does she get, and by how much does her mass increase? 13. (II) Three charged particles are placed at the corners of an equilateral triangle of side 1.20 m. The charges are +7.0 µ C, −8.0 µ C, and −8.0 µ C. Calculate the magnitude and direction of the net force on Q 3 . 17. (II) A charge Q is transferred from an initially uncharged plastic ball to an identical ball 12 cm away. The force of attraction is then 17 mN. (a) How much charge
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  • Spring '14
  • Finkenthal
  • Physics, Electric charge, 5 kg, 1.0g, 1.20 m, 8.45 cm

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