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39a) Using the left charge in figure P22.39b as the origin, label the forces (2) on the right charge. b) Write down the equation for the 2Fx acting on the right charge. In figure P22.39a, when Li 4 cm, Fsp 0. c) Solve the equation in b) for the electric force, Fe. d) Use Coulombs law to determine the charge Q eV one
Review. Two identical blocks resting on a frictionless, horizontal surface are connected by a light spring hav- ing a spring constant k 100 N/m and an unstretched length Li - 0.400 m as shown in Figure P22.39a. A charge Q is slowly placed on each block, causing the spring to stretch to an equilibrium length L 0.500 m as shown in Figure P22.39b. Determine the value of Q, model- ing the blocks as charged particles. 39. Li Figure P22.39 Problems 39 and 40
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vint00 No The spina face and the attractive electr 4ate face Canc each at ker - 2 x C-4) 3-33 X10-e/ .

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