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AP Physics Chapter 15 Answers Homework 15.A ( 20 questions) 7) 3.1 x 10 14 electrons

AP Physics Chapter 15 Answers Homework 15.A ( 20 questions) 7) 3.1 x 10 14 electrons 8) a) -8.0 x 10 -10 C b) 5.0 x 10 9 electrons 9) a) +4.8 x 10 -9 C b) 2.7 x 10 -20 kg 10) there are 2 protons in each alpha particle, so q=+6.40 x 10 -19 C 13) no

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AP Physics Chapter 15 Answers Homework 15.A ( 20 questions) 7) 3.1 x 10 14 electrons

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  1. AP Physics Chapter 15 Answers Homework 15.A ( 20 questions) 7) 3.1 x 1014 electrons 8) a) -8.0 x 10-10 C b) 5.0 x 109 electrons 9) a) +4.8 x 10-9 C b) 2.7 x 10-20 kg 10) there are 2 protons in each alpha particle, so q=+6.40 x 10-19 C 13) no 14) If you bring a negatively charged object near the electroscope, the induction process will charge the electroscope with positive charges. You can prove the charges are positive by bringing the negatively charged object near the leaves and seeing if the leaves fall. 22) 1.3 x 10-7 N 23) a) 5.8 x 10-11 N b) Zero, because they are internal forces of the system. 25) 2.24 m 26) 1.0 N 27) a) 50 cm b) 50 cm 28) a) Nowhere, since both forces are in the same direction. b) Nowhere, since both forces are in the same direction. 30) a) 8.2 x 10-8 N b) 2.2 x 106 m/s c) 9.2 x 1021 g, where g=9.80 m/s2

  2. AP Physics Chapter 15 Answers Homework 15.B (16 questions) 43) 2.0 x 105 N/C 44) 2.9 x 109 N/C 45) 1.2 x 10-7 m 46) 9.0 x 105 N/C toward the -5.0 C charge 47) proton: 1.0 x 10-7 N/C upward electron: 5.6 x 10-11 N/C downward (2 points) 64) a) none b) outward c)none d) outward 65) a) zero b) – kQ/r2 (the negative sign indicates it is toward the center)c) zero d) – kQ/r2 66) More positive charges accumulate at sharper points and the electric field lines are perpendicular to and pointing outward from the surface. 67) More negative charges accumulate at the point and the electric field lines are perpendicular to and pointing toward the surface.

  3. AP Chapter 15 Answers Homework 15.B Questions Total Miss Score 0-3 10 4-5 9 6-7 8 8-9 7 10-11 6 >11 5

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