Exo 2. Evolution du système solaire a) Numérote les évènements suivants dans l'ordre chronologique :
Fusion des roches pour former des planètes
Echauffement de la partie centrale du disque qui donnera naissance au Soleil
Système constitué du Soleil et de 8 planètes 5
Contraction du nuage de gaz qui s'aplatie
Condensation de poussières pour former des roches ​

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road

Is a volume of space that is empty of matter.