El cabal d' una aixeta es de 80L/min. Utiliza factors de conversió per saber quant temps trigarà a omplir-se una piscina de 500 m3. Calcula en minuts i després expressa el resultat en hores i dies.

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