Todas as questões do ENEM

Um objeto de 4,0cm de altura encontra-se 20,0cm distante de uma lente delgada convergente.

Sabendo-se que a distância focal da lente é igual a 12,0cm, é correto afirmar que o tamanho da imagem formada, em cm, é igual a

     A Organização Internacional para as Migrações (OIM) foi criada em 1951 e tem 173 Estados-membros. Desde 2019, a OIM coordena e é secretariado executivo da Rede da Organização das Nações Unidas (ONU) para migração. A OIM está comprometida com o princípio de que a migração ordenada beneficia a todos.

    One reason growth forecasts for rich nations are so grim is the common assumption that birth rates are falling. Fewer people will produce less income, and shrinking economies. Only the assumption of aging populations may be wrong, according to a recent report by Goldman Sachs that looks at key demographic trends for the 21st century.

    Since bottoming out in 2001, fertility rates in a number of developed economies have actually been on the rise. Among rich economies, the jump is most pronounced in places like the United Kingdom, France, Spain, and the U.S. Larger immigrant populations in these nations have something to do with this, as they tend to have more children. Yet the effect is only short term, as migrants adopt the fertility rates of their new homes within a generation or so.

    Goldman’s new analysis shows that another reason for the unexpected jump, and one that will play a bigger role in the future, is that women in rich countries have been having children later and later in life, something that traditional economic models don’t account for. Standard estimates of fertility are still tabulated assuming that most women are having children in their early 20s, rather than late 20s or even 30s and 40s, as has become more common in rich countries with lots of women in the workforce. “In parts of Europe (this method of calculation) has probably understated true fertility by about 15 to 20 percent,” notes Goldman Sachs economist Peter Berezin.

    Those are big numbers, with potentially very significant ramifications. For starters, it could be that some of the problems faced by aging nations with shrinking tax bases (like, for example, overblown health-care spending, crumbling infrastructure, and budget shortfalls) may not be quite as bad as once envisioned. In fact, there is some evidence to suggest that we may soon start seeing mini baby booms, which, in 20 years or so, could have a significant impact on the size of rich nations’ workforces, a shift that can’t come too soon for countries now struggling with unprecedented levels of national debt. Another bright spot – recent surveys by Eurobarometer show that European women between the ages of 25 and 39 want to have more children, if only it were easier to find a better work-life balance. Note to European leaders: stop worrying about the effects of immigration and start creating better-paid part-time work.

Newsweek, September 28, 2009

     Se ilustres agrônomos, que eram ao mesmo tempo grandes proprietários, introduziram em certos países excelentes métodos de cultura, se eles trataram seus campos com ciência, como fábricas de produtos químicos nas quais se aplicam os mais recentes procedimentos, tornaram conhecidas novas espécies de plantas ou animais, ou então praticaram invenções ignoradas antes deles, não se deve contudo esquecer que o latifúndio, em sua essência, comporta fatalmente a privação da terra para a maioria: se alguns têm muito é porque a maioria não tem mais nada.

Instrução: A questão está relacionadas ao texto abaixo.

Assinale a alternativa que preenche adequadamente as lacunas das linhas 02, 36, 67 e 71, nesta ordem. 

Disponível em: https://earth.google.com.

Acesso em: 13 out. 2023 (adaptado).

A comparação das imagens de satélite indica que o rompimento da barragem de rejeitos em Mariana (MG), em 2015, provocou o(a)

Instrução: A questão está relacionadas ao texto abaixo.

O texto acima é parte de um conto narrado pela irmã mais nova do personagem Nnamabia.

Assinale a alternativa que resume adequadamente a parte apresentada. 

    One reason growth forecasts for rich nations are so grim is the common assumption that birth rates are falling. Fewer people will produce less income, and shrinking economies. Only the assumption of aging populations may be wrong, according to a recent report by Goldman Sachs that looks at key demographic trends for the 21st century.

    Since bottoming out in 2001, fertility rates in a number of developed economies have actually been on the rise. Among rich economies, the jump is most pronounced in places like the United Kingdom, France, Spain, and the U.S. Larger immigrant populations in these nations have something to do with this, as they tend to have more children. Yet the effect is only short term, as migrants adopt the fertility rates of their new homes within a generation or so.

    Goldman’s new analysis shows that another reason for the unexpected jump, and one that will play a bigger role in the future, is that women in rich countries have been having children later and later in life, something that traditional economic models don’t account for. Standard estimates of fertility are still tabulated assuming that most women are having children in their early 20s, rather than late 20s or even 30s and 40s, as has become more common in rich countries with lots of women in the workforce. “In parts of Europe (this method of calculation) has probably understated true fertility by about 15 to 20 percent,” notes Goldman Sachs economist Peter Berezin.

    Those are big numbers, with potentially very significant ramifications. For starters, it could be that some of the problems faced by aging nations with shrinking tax bases (like, for example, overblown health-care spending, crumbling infrastructure, and budget shortfalls) may not be quite as bad as once envisioned. In fact, there is some evidence to suggest that we may soon start seeing mini baby booms, which, in 20 years or so, could have a significant impact on the size of rich nations’ workforces, a shift that can’t come too soon for countries now struggling with unprecedented levels of national debt. Another bright spot – recent surveys by Eurobarometer show that European women between the ages of 25 and 39 want to have more children, if only it were easier to find a better work-life balance. Note to European leaders: stop worrying about the effects of immigration and start creating better-paid part-time work.

Newsweek, September 28, 2009

    Um dos grandes desafios no combate ao desmatamento no Brasil consiste na intensificação das atividades agropecuárias. Uma maior produtividade por hectare reduziria a necessidade da incorporação de novas áreas agrícolas para o aumento de produção, diminuindo a pressão sobre o desmatamento. Concilia-se assim a expansão da produção de alimentos, fibras e biocombustíveis com a necessidade de preservação ambiental.

Duas esferas condutoras, isoladas e em equilíbrio eletrostático, tem cargas Q1 = 4,0μC e Q2 = −2,0μC e raios R1 = 4,0cm e R2 = 5,0cm.

Sabendo-se que as esferas são postas em contato através de um fio condutor, é correto afirmar que o potencial de equilíbrio, em 105 V, é igual a

Instrução: A questão está relacionadas ao texto abaixo.

Considere as seguintes afirmações em relação ao texto.

I - A narradora deixa transparecer ciúme e sentimentos de injustiça, ao relatar como os pais protegiam e davam preferência ao irmão, apesar de sua conduta reprovável.

II - A narração da irmã sugere que a mãe teria tido papel preponderante nos eventos que culminaram na prisão de Nnamabia.

III- O relato da irmã sugere que o roubo das joias da mãe teria sido um divisor de águas na vida do irmão, pois teria reverberado alguns anos mais tarde.

Quais estão corretas? 

    One reason growth forecasts for rich nations are so grim is the common assumption that birth rates are falling. Fewer people will produce less income, and shrinking economies. Only the assumption of aging populations may be wrong, according to a recent report by Goldman Sachs that looks at key demographic trends for the 21st century.

    Since bottoming out in 2001, fertility rates in a number of developed economies have actually been on the rise. Among rich economies, the jump is most pronounced in places like the United Kingdom, France, Spain, and the U.S. Larger immigrant populations in these nations have something to do with this, as they tend to have more children. Yet the effect is only short term, as migrants adopt the fertility rates of their new homes within a generation or so.

    Goldman’s new analysis shows that another reason for the unexpected jump, and one that will play a bigger role in the future, is that women in rich countries have been having children later and later in life, something that traditional economic models don’t account for. Standard estimates of fertility are still tabulated assuming that most women are having children in their early 20s, rather than late 20s or even 30s and 40s, as has become more common in rich countries with lots of women in the workforce. “In parts of Europe (this method of calculation) has probably understated true fertility by about 15 to 20 percent,” notes Goldman Sachs economist Peter Berezin.

    Those are big numbers, with potentially very significant ramifications. For starters, it could be that some of the problems faced by aging nations with shrinking tax bases (like, for example, overblown health-care spending, crumbling infrastructure, and budget shortfalls) may not be quite as bad as once envisioned. In fact, there is some evidence to suggest that we may soon start seeing mini baby booms, which, in 20 years or so, could have a significant impact on the size of rich nations’ workforces, a shift that can’t come too soon for countries now struggling with unprecedented levels of national debt. Another bright spot – recent surveys by Eurobarometer show that European women between the ages of 25 and 39 want to have more children, if only it were easier to find a better work-life balance. Note to European leaders: stop worrying about the effects of immigration and start creating better-paid part-time work.

Newsweek, September 28, 2009

Instrução: A questão está relacionadas ao texto abaixo.

Considere as seguintes afirmações acerca do texto.

I - A substituição do pronome he (l. 13) por they implicaria a modificação de duas outras palavras na frase que o contém.

II - O uso da voz passiva na oração the window had been opened from the inside (l. 26-27) indica que existe certeza quanto a quem executou a ação descrita.

III- As ocorrências do pronome it, nas linhas 51, 52 e 53, têm como referente o roubo das joias da mãe de Nnamabia.

Quais estão corretas?

       Buscando assegurar a manutenção e a disponibilidade de sementes adaptadas às suas condições de cultivo, muitos grupos de agricultores desenvolveram uma diversidade de estratégias baseadas nos seus conhecimentos sobre as características das variedades locais, formas de armazenamento e manejo. Os bancos de sementes familiares constituem uma tradição importante em muitas comunidades rurais. Nesses casos, as sementes, que são ano após ano selecionadas e melhoradas, são mantidas na propriedade rural e os conhecimentos a elas associados são passados de geração para geração.

    One reason growth forecasts for rich nations are so grim is the common assumption that birth rates are falling. Fewer people will produce less income, and shrinking economies. Only the assumption of aging populations may be wrong, according to a recent report by Goldman Sachs that looks at key demographic trends for the 21st century.

    Since bottoming out in 2001, fertility rates in a number of developed economies have actually been on the rise. Among rich economies, the jump is most pronounced in places like the United Kingdom, France, Spain, and the U.S. Larger immigrant populations in these nations have something to do with this, as they tend to have more children. Yet the effect is only short term, as migrants adopt the fertility rates of their new homes within a generation or so.

    Goldman’s new analysis shows that another reason for the unexpected jump, and one that will play a bigger role in the future, is that women in rich countries have been having children later and later in life, something that traditional economic models don’t account for. Standard estimates of fertility are still tabulated assuming that most women are having children in their early 20s, rather than late 20s or even 30s and 40s, as has become more common in rich countries with lots of women in the workforce. “In parts of Europe (this method of calculation) has probably understated true fertility by about 15 to 20 percent,” notes Goldman Sachs economist Peter Berezin.

    Those are big numbers, with potentially very significant ramifications. For starters, it could be that some of the problems faced by aging nations with shrinking tax bases (like, for example, overblown health-care spending, crumbling infrastructure, and budget shortfalls) may not be quite as bad as once envisioned. In fact, there is some evidence to suggest that we may soon start seeing mini baby booms, which, in 20 years or so, could have a significant impact on the size of rich nations’ workforces, a shift that can’t come too soon for countries now struggling with unprecedented levels of national debt. Another bright spot – recent surveys by Eurobarometer show that European women between the ages of 25 and 39 want to have more children, if only it were easier to find a better work-life balance. Note to European leaders: stop worrying about the effects of immigration and start creating better-paid part-time work.

Newsweek, September 28, 2009

Instrução: A questão está relacionadas ao texto abaixo.

Considere as seguintes propostas de alteração de segmentos do texto.

I - Substituição da palavra since (l. 14) por once.

II - Substituição da forma verbal pawned (l. 38) por lost.

III- Substituição de with whom he had spent it (l. 42-43) por who he had spent it with.

Quais resultariam gramaticalmente corretas e não alterariam o sentido literal, se aplicadas ao texto?