Todas as questões do ENEM

• Não expor a embalagem ao sol.
• Não usar próximo a chamas.
• Não descartar em incinerador.

Com relação à estrutura representada, pode-se afirmar que

Na situação descrita, o módulo do empuxo aumenta, porque

Está correto apenas o contido em

As luzes verde, amarela e vermelha são consideradas ondas eletromagnéticas que, no vácuo, têm

Dado que as raízes da equação x³ – 3x² – x + k = 0, onde k é uma constante real, formam uma progressão aritmética, o valor de k é:

Segundo o historiador Fernando Novais, o pacto colonial “define o sistema colonial porque é através dele que as colônias preenchem sua função histórica, isto é, respondem aos estímulos que lhes deram origem, que formam a sua razão de ser, enfim, que lhes dão sentido".

(NOVAIS, Fernando A. O Brasil nos quadros do Antigo Sistema Colonial. In: MOTA, Carlos Guilherme (org.). Brasil em perspectiva. São Paulo: Difusão Europeia do Livro, 1973, p. 47-63.) 

Considerando as ideias expostas, é correto afirmar que a exploração açucareira, no nordeste do Brasil Colonial, 

Em 1907 foi realizado o primeiro levantamento geral da indústria no Brasil, indicando a existência de 3 258 empresas. Treze anos mais tarde, o Censo Industrial apontava a existência de 13 336 empresas.

Acerca do expressivo crescimento da indústria brasileira, nesse período, é correto afirmar que

Há livros da famosa escritora Agatha Christie que fazem menção a crimes que foram cometidos com o uso de substâncias químicas. Em O misterioso caso de Styles, é citada a substância hidrocloreto de estricnina, extremamente venenosa, cuja solubilidade em água é cerca de 1 g / 40 mL. Sabendo-se que a massa molar dessa substância é aproximadamente 400 g / mol, calcula-se que a solubilidade em água do veneno em questão, expressa em mol / L, seja da ordem de

Uma das substâncias responsáveis pelo cheiro desagradável que as pessoas sentem, ao passarem nas proximidades de rios e de córregos poluídos por esgoto, é o sulfeto de hidrogênio, H₂S (g). Esse mau cheiro se intensifica principalmente em dias quentes, pois o aumento de temperatura diminui a solubilidade desse gás em água.

Quando borbulhado em água, o H₂S comporta-se como ácido fraco, estabelecendo-se os equilíbrios simultâneos representados pelas equações a seguir:

                                             

Dentre os procedimentos a seguir, o único que provoca um aumento do escape de sulfeto de hidrogênio de uma solução aquosa para o ar é

Considere o seguinte esquema correspondente a um aparelho utilizado para testar a condutibilidade elétrica de diferentes materiais.

                         

A lâmpada deverá acender com brilho intenso, quando os terminais T₁ e T₂ forem 

O pigmento branco mais utilizado em tintas e em esmaltes é o dióxido de titânio, TiO₂ . A porcentagem em massa de titânio nesse pigmento é de

Massas molares em g/mol
Ti = 48
O = 16

CHINA'S NEW SEX SYMBOLS

BY ISAAC STONE FISH

       ASIA IN THE CATEGORY of the world's sexiest politicians, China's dour communist apparatchiks¹ would seem to be far behind America's legendary ladies' men presidents and Europe's bunga-bunga leaders. But a survey released in December by the All-China Women's Federation found that a Middle Kingdom mandarin is the top pick for an ideal partner among Chinese women.

      What's the appeal? (It can't be the ill-fitting suits.) It's money, money, money. While government officials receive a modest salary – well under $1,000 a month- they can usually leverage their position for personal gain, often through shady means. A corrupt vice district head in Beijing was recently arrested for accumulating more than $ 6,5 million; in other cases the perks have reached into the hundreds of millions. And even for officials who aren't skimming off the top, a government job (and the attendant legal perks) provides a level of security that's quite desirable for China's marriage-minded ladies, especially compared with a less stable position at a state-owned or private company.

      There's also the growing reputation of Chinese government officials as a particularly virile lot. China's state-owned press often titillates readers with tales of bureaucratic sex scandals: in one major story last year, a provincial tobacco-bureau chief's diary was leaked online, with page after page of prurient details about his trysts² with young beauties (including fellow government employees). The public's reaction was generally sympathetic to the cad. One prominent blogger maintained the bureau chief was a good official because he managed to spend some time with his wife despite the womanizing, took less than $10,000 in bribes, and didn't visit prostitutes. In other words, a real catch. In a survey on the blogger's site, almost all the more than 100,000 respondents thought the official should keep his job. That's sex appeal – and popular appeal.

                                                                                       ( Newsweek, February 7, 2011.) 

apparatchiks¹ : burocratas do partido comunista chinês
trysts² : encontros secretos
De acordo com o texto, os apparatchiks são considerados

CHINA'S NEW SEX SYMBOLS

BY ISAAC STONE FISH

       ASIA IN THE CATEGORY of the world's sexiest politicians, China's dour communist apparatchiks¹ would seem to be far behind America's legendary ladies' men presidents and Europe's bunga-bunga leaders. But a survey released in December by the All-China Women's Federation found that a Middle Kingdom mandarin is the top pick for an ideal partner among Chinese women.

      What's the appeal? (It can't be the ill-fitting suits.) It's money, money, money. While government officials receive a modest salary – well under $1,000 a month- they can usually leverage their position for personal gain, often through shady means. A corrupt vice district head in Beijing was recently arrested for accumulating more than $ 6,5 million; in other cases the perks have reached into the hundreds of millions. And even for officials who aren't skimming off the top, a government job (and the attendant legal perks) provides a level of security that's quite desirable for China's marriage-minded ladies, especially compared with a less stable position at a state-owned or private company.

      There's also the growing reputation of Chinese government officials as a particularly virile lot. China's state-owned press often titillates readers with tales of bureaucratic sex scandals: in one major story last year, a provincial tobacco-bureau chief's diary was leaked online, with page after page of prurient details about his trysts² with young beauties (including fellow government employees). The public's reaction was generally sympathetic to the cad. One prominent blogger maintained the bureau chief was a good official because he managed to spend some time with his wife despite the womanizing, took less than $10,000 in bribes, and didn't visit prostitutes. In other words, a real catch. In a survey on the blogger's site, almost all the more than 100,000 respondents thought the official should keep his job. That's sex appeal – and popular appeal.

                                                                                       ( Newsweek, February 7, 2011.) 

apparatchiks¹ : burocratas do partido comunista chinês
trysts² : encontros secretos
Segundo o texto, pode-se inferir que

CHINA'S NEW SEX SYMBOLS

BY ISAAC STONE FISH

       ASIA IN THE CATEGORY of the world's sexiest politicians, China's dour communist apparatchiks¹ would seem to be far behind America's legendary ladies' men presidents and Europe's bunga-bunga leaders. But a survey released in December by the All-China Women's Federation found that a Middle Kingdom mandarin is the top pick for an ideal partner among Chinese women.

      What's the appeal? (It can't be the ill-fitting suits.) It's money, money, money. While government officials receive a modest salary – well under $1,000 a month- they can usually leverage their position for personal gain, often through shady means. A corrupt vice district head in Beijing was recently arrested for accumulating more than $ 6,5 million; in other cases the perks have reached into the hundreds of millions. And even for officials who aren't skimming off the top, a government job (and the attendant legal perks) provides a level of security that's quite desirable for China's marriage-minded ladies, especially compared with a less stable position at a state-owned or private company.

      There's also the growing reputation of Chinese government officials as a particularly virile lot. China's state-owned press often titillates readers with tales of bureaucratic sex scandals: in one major story last year, a provincial tobacco-bureau chief's diary was leaked online, with page after page of prurient details about his trysts² with young beauties (including fellow government employees). The public's reaction was generally sympathetic to the cad. One prominent blogger maintained the bureau chief was a good official because he managed to spend some time with his wife despite the womanizing, took less than $10,000 in bribes, and didn't visit prostitutes. In other words, a real catch. In a survey on the blogger's site, almost all the more than 100,000 respondents thought the official should keep his job. That's sex appeal – and popular appeal.

                                                                                       ( Newsweek, February 7, 2011.) 

apparatchiks¹ : burocratas do partido comunista chinês
trysts² : encontros secretos
De acordo com o texto, as mulheres chinesas preferem um relacionamento com funcionários do governo

CHINA'S NEW SEX SYMBOLS

BY ISAAC STONE FISH

       ASIA IN THE CATEGORY of the world's sexiest politicians, China's dour communist apparatchiks¹ would seem to be far behind America's legendary ladies' men presidents and Europe's bunga-bunga leaders. But a survey released in December by the All-China Women's Federation found that a Middle Kingdom mandarin is the top pick for an ideal partner among Chinese women.

      What's the appeal? (It can't be the ill-fitting suits.) It's money, money, money. While government officials receive a modest salary – well under $1,000 a month- they can usually leverage their position for personal gain, often through shady means. A corrupt vice district head in Beijing was recently arrested for accumulating more than $ 6,5 million; in other cases the perks have reached into the hundreds of millions. And even for officials who aren't skimming off the top, a government job (and the attendant legal perks) provides a level of security that's quite desirable for China's marriage-minded ladies, especially compared with a less stable position at a state-owned or private company.

      There's also the growing reputation of Chinese government officials as a particularly virile lot. China's state-owned press often titillates readers with tales of bureaucratic sex scandals: in one major story last year, a provincial tobacco-bureau chief's diary was leaked online, with page after page of prurient details about his trysts² with young beauties (including fellow government employees). The public's reaction was generally sympathetic to the cad. One prominent blogger maintained the bureau chief was a good official because he managed to spend some time with his wife despite the womanizing, took less than $10,000 in bribes, and didn't visit prostitutes. In other words, a real catch. In a survey on the blogger's site, almost all the more than 100,000 respondents thought the official should keep his job. That's sex appeal – and popular appeal.

                                                                                       ( Newsweek, February 7, 2011.) 

apparatchiks¹ : burocratas do partido comunista chinês
trysts² : encontros secretos
No último parágrafo do texto, o adjetivo sympathetic empregado em −The public's reaction was generally sympathetic to the CAD. − pode ser traduzido por

CHINA'S NEW SEX SYMBOLS

BY ISAAC STONE FISH

       ASIA IN THE CATEGORY of the world's sexiest politicians, China's dour communist apparatchiks¹ would seem to be far behind America's legendary ladies' men presidents and Europe's bunga-bunga leaders. But a survey released in December by the All-China Women's Federation found that a Middle Kingdom mandarin is the top pick for an ideal partner among Chinese women.

      What's the appeal? (It can't be the ill-fitting suits.) It's money, money, money. While government officials receive a modest salary – well under $1,000 a month- they can usually leverage their position for personal gain, often through shady means. A corrupt vice district head in Beijing was recently arrested for accumulating more than $ 6,5 million; in other cases the perks have reached into the hundreds of millions. And even for officials who aren't skimming off the top, a government job (and the attendant legal perks) provides a level of security that's quite desirable for China's marriage-minded ladies, especially compared with a less stable position at a state-owned or private company.

      There's also the growing reputation of Chinese government officials as a particularly virile lot. China's state-owned press often titillates readers with tales of bureaucratic sex scandals: in one major story last year, a provincial tobacco-bureau chief's diary was leaked online, with page after page of prurient details about his trysts² with young beauties (including fellow government employees). The public's reaction was generally sympathetic to the cad. One prominent blogger maintained the bureau chief was a good official because he managed to spend some time with his wife despite the womanizing, took less than $10,000 in bribes, and didn't visit prostitutes. In other words, a real catch. In a survey on the blogger's site, almost all the more than 100,000 respondents thought the official should keep his job. That's sex appeal – and popular appeal.

                                                                                       ( Newsweek, February 7, 2011.) 

apparatchiks¹ : burocratas do partido comunista chinês
trysts² : encontros secretos
No último parágrafo do texto, a preposição despite empregada em − despite the womanizing − pode ser substituída por