Les ampoules fluo-compactes Les ampoules fluo-compactes
remplacent les ampoules à incandes-
cence pour des raisons d'économie
d'énergie mais elles contiennent du
mercure dangereux même à faible
dose. Lorsqu'elles se cassent, elles
liberent environ 1 mg de mercure il faut donc les jeter
dans des conteneurs spéciaux

a. Justifie que la masse d'un électron est négligeable
devant celle d'un nucléon.

b. Sachant qu'un atome de mercure possède 201
nucléons, estime la masse de l'atome en explicitant
les approximations effectuées.

c. Estime le nombre d'atomes de mercure libérés lors-
qu'une ampoule est brisée.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.