A slug has just started to move straight across a busy street in Littletown that is 8.0 meters wide, at a constant speed of 3.9 millimeters per second. The concerned drivers on the street halt until the slug has reached the opposite side. How many seconds elapse until the traffic can start moving again?

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

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