Part a: By what distance do two objects carrying 1.0 C of charge each have to be separated before the electric force exerted on each object is 3.5 N ?
Part b: How much charge should be placed on each of two small objects separated by 2.0 m so that the electric force exerted on each is 3.5 N ?
**For a, I got d=51 km but I cant solve b

Part a: By what distance do two objects carrying 1.0 C of charge each have to...
Do each question separately and show step by step
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