On choisit comme système d'étude une cabine de téléphérique 1- avec quel(s) objet(s) est-elle en interaction ?
2- parmi ces interactions, la ou lesquelles sont exercée(s) à distance ?
3- indique également une interaction s’exerçant de manière localisée.
4- l’une des interactions te paraît-elle négligeable comparées aux autres ?

is there any options? maybe im just not seeing them but i need the options to

-love shrooms

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.