Coulomb's Law and Newton's Universal Law of Gravitation look very similar but the constants they have are very different from each other. What do those constants tell us about how the electrostatic force per Coulomb of
charge compares to the gravitational force per kg of mass?

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