Todas as questões do ENEM

O texto indica que, ao fazer o upload de centenas de fotos de férias, o Google Plus

    Durante os anos de 1854-55, o governo brasileiro — por meio de sua representação diplomática em Londres — e os livre-cambistas ingleses — nas colunas do Daily News e na Câmara dos Comuns — aumentaram a pressão pela revogação da Lei Aberdeen. O governo britânico, entretanto, ainda receava que, sem um tratado anglo-brasileiro satisfatório para substituí-la, não haveria nada que impedisse os brasileiros de um dia voltarem aos seus velhos hábitos.

BETHELL, L. A abolição do comércio brasileiro de escravos. Brasília: Senado Federal, 2002 (adaptado).

As tensões diplomáticas expressas no texto indicam o interesse britânico em

O composto que apresenta átomo de carbono assimétrico é:

A História da Filosofia, com base nos grandes questionamentos que cada período suscitou, dividiu-se em Filosofia:

     So a scientist walks into a shopping mall to watch people laugh. There’s no punchline. Laughter is a serious scientific subject, one that researchers are still trying to figure out. Laughing is primal, our first way of communicating. Apes laugh. So do dogs and rats. Babies laugh long before they speak. No one teaches you how to laugh. You just do. And often you laugh involuntarily, in a specific rhythm and in certain spots in conversation.
    You may laugh at a prank on April Fools’ Day. But surprisingly,  only 10 to 15 percent of laughter is the result of someone making a joke, said Baltimore neuroscientist Robert Provine, who has studied laughter for decades. Laughter is mostly about social responses rather than reaction to a joke. “Laughter above all else is a social thing,’’ Provine said. “The requirement for laughter is another person.’’  
    Over the years, Provine, a professor with the University of Maryland Baltimore County, has boiled laughter down to its basics. “All language groups laugh ‘ha-ha-ha’ basically the same way,’’ he said. “Whether you speak Mandarin, French or English, everyone will understand laughter. ... There’s a pattern generator in our brain that produces this sound.’’
    Each “ha’’ is about one-15th of a second, repeated every fifth of a second, he said. Laugh faster or slower than that and it sounds more like panting or something else. Deaf people laugh without hearing, and people on cell phones laugh without seeing, illustrating that laughter isn’t dependent on a single sense but on social interactions, said Provine, author of the book “Laughter: A Scientific Investigation.’’   
    “It’s joy, it’s positive engagement with life,’’ said Jaak Panksepp, a Bowling Green University psychology professor. “It’s deeply social.’’ And it’s not just a people thing either. Chimps tickle each other and even laugh when another chimp pretends to tickle them. By studying rats, Panksepp and other scientists can figure out what’s going on in the brain during laughter. And it holds promise for human ills.
    Northwestern biomedical engineering professor Jeffrey Burgdorf has found that laughter in rats produces an insulin-like growth factor chemical that acts as an antidepressant and anxietyreducer. He thinks the same thing probably happens in humans, too. This would give doctors a new chemical target in the brain in their effort to develop drugs that fight depression and anxiety in people. Even so, laughter itself hasn’t been proven to be the best medicine, experts said.

Na charge, o personagem formula uma pergunta cuja resposta está sugerida pela imagem refletida no espelho.

    Mulheres naturalistas raramente figuraram na corrida por conhecer terras exóticas. No século XIX, mulheres como Lady Charlotte Canning eventualmente coletavam espécimes botânicos, mas quase sempre no papel de esposas coloniais, viajando para locais onde seus maridos as levavam e não em busca de seus próprios projetos científicos.

SOMBRIO, M. M. O. Em busca pelo campo — Mulheres em expedições científicas

no Brasil em meados do século XX. Cadernos Pagu, n. 48, 2016.

No contexto do século XIX, a relação das mulheres com o campo científico, descrita no texto, é representativa da