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Sorry this is the real question #3 not #2 I have solved #2.
With number #3 I have gotten help before with this problem but I cannot understand the hand writhing. Please help!

Problem 3: Consider the arrangement of three point charges in a right triangle shown in the figure, which have charges q1- 7.5 uC, 42-51 HC, and 93 15 uC. The distance between q1 and q2 is 37 cm and the distance between q2 and q3 is 65 cm.
ndomized Variables 1 7.5 HC 9, 93 15 HC a-37cm b- 65 cm I1 42 Etheexpertta.com Part (a) How much potential energy, in joules, is stored in this configuration of charges? Numerie :A numeric value is expected and not an expression. Part (b) Now assume that q1 and q2 are fixed in space at the locations indicated, and gs is brought into its position from infinity. What is the change in potential energy of the system, in joules, during this process? Numerie : A numeric value is expected and not an expression.
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