2.2 Driving at 36 m. s? (130 km. h:1) along a straight horizontal road (in a 90 km. h 'i. e. 25 m. si zone), the driver sees a speed trap 69 m ahead. The driver's reaction time is one second i. e. it takes one second before the brakes are applied. The car then decelerates at 6 m. s?. Calculate: 2.2.1 the distance covered during the reaction time. ​

their crystal patterns have been disrupted by stress

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