Utilisé tance
ser) es
ou un
alors
vers
6 La lumière du Soleil
Convertir et calculer
La lumière émise par le Soleil
parcourt 150 000 000 km en
8 min 20 s pour atteindre la
Terre.
Détermine la vitesse de
propagation de la lumière
qui nous parvient du Soleil.
Exprime le résultat en km/s
puis en m/s en utilisant la
a. Pro
de la
b. LE
la di
Just
notation scientifique.

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force