Exercice 7Les performances sportives dans différentes disciplines sont les suivantes :
a. Athlétisme : 100 m en 9,58 s
b. Patinage de vitesse : 500 m en 35,76 s
C. Vélo : 1 km en 1 min 2,09 s
Déterminer les vitesses des sportifs en 2 unités
distinctes (en m/s et Km/h)

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

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