Determining the value of the charge
The electric potential at a position located a distance of 18.9 mm from a positive point charge of 8.70×10-9 C and 13.9 mm from a second point charge is 1.42 kV. Calculate the value of the second charge.
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Percent confident of the results with an error of plus or minus $1.50, and if this same type of study conducted last year had a standard deviation of about $29.25, the appropriate sample size for this study would be approximately
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