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1a) Two identical positively charged particles experience electric forces of magnitude 209 N when they are...

1a) Two identical positively charged particles experience electric forces of magnitude 209 N when they are separated by 4 cm. Calculate the charge on each particle.

b) Two electrons and a proton are placed on corners of a square with sides 25 cm. The proton is opposite the empty corner. What is the magnitude of the electric force on the proton?

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