Analyse conformationnelle du butane 

Bonjour ! Vous trouverez si le site de Khan Academy une vidéo d'introduction aux énergies cinétique et potentielle : fr.khanacademy.org/science/physics/work-and-energy/work-and-energy-tutorial/v/work-and-energy-part-2

i guess Im asking randomly but does someone know a trick to get back into an instagram account? I was dumb lost my login password. I love any help you can give me

@Sullivan Castiel instablaster ;)

@Josue Fisher thanks for your reply. I got to the site thru google and im trying it out now. I see it takes a while so I will get back to you later with my results.

@Josue Fisher it worked and I actually got access to my account again. Im so happy:D Thanks so much you saved my account !