Two small, identical metal balls with charges 7.0 µC and 14.0 µC are held in place 1.9 m apart. In an experiment, they are connected for a short time by a conducting wire. a) What will be the charge on each ball after this experiment?
new charge on 7.0 µC ball = ? µC
new charge on 14.0 µC ball = ? µC

(b) By what factor will the magnitude of the electrostatic force on either ball change after this experiment is performed?

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Please explain in detail so I can understand.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

because if the tool that you are using is not balanced it there would be false mass.