* PHYS 260 Webassign Ho x / cowww.webassi Chapter 23 Pre-Lecture t/Assigniment-R
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* PHYS 260 Webassign Ho x / cowww.webassi Chapter 23 Pre-Lecture t/Assigniment-Responses/submit?dep 1644/46403 -1 points KarzPSE1 23P031.M My Notes Ask Your Twn electrons in djarnnt tomic shells re separated by dist nce of 3.18 10-11 m. (a) what is the magnitude of the electrostatic force between the electrors? (b) What is theratia of th electrostatic iarce to the gravitational force between the electrons? Need Help? Read itMaster It My Notes Ask Your one end ai a light spririg wth lotte cristant k = 25 m is alleched to wall and the uther end tD d 'metal block with charge 4A = 2.02 C an hun ortal frictionless table as showr11n the ligure A second black with charue 9B 3.58 C is brought close to the first block. The spring stretches as the blocks attract each other so tat at equilibrium, the blocks are separated by a distance d 13.0 cm what is the displacement x o the spring? Your response differs significantly from the correct answor Rework your solution from the beginning and check cach step corefully, m YB Need Help? Read itMaster It 631 PM 8/21/2017 Type: here to searchExplanation / Answer
8) a) Magnitude of electrostatic force,
Fe = kqe2/r2 = (8.99 * 109) * (1.6 * 10-19)2 / (3.38 * 10-11)2 = 2.01 * 10-7 N
b) Gravitational force between the electrons,
Fg = Gme2/r2 = (6.67 * 10-11) * (9.11 * 10-31)2 / (3.38 * 10-11)2 = 4.85 * 10-50 N
So, Fe/Fg = (2.01 * 10-7) / (4.85 * 10-50) = 4.14 * 1042
9) At equilibrium,
Spring force on A = Electrostatic force on A by B
Kx = k |qA| |qB| /d2
=> 125x = (8.99 * 109) * (2.02 * 10-6) * (3.58 * 10-6) / (13 * 10-2)2
=> x = 0.031 m
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