Why is it important to balance a chemical equation? a. it is not important to balance a chemical equal b. to make sure you have the correct products c. to make sure you have the correct reactants d. to obey the law of conservation of mass

D I took the quiz and I'm pretty sure you will get it correct

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