Todas as questões do ENEM

Em 4 de julho de 1776, as treze colônias que vieram inicialmente a constituir os Estados Unidos da América (EUA) declaravam sua independência e justificavam a ruptura do Pacto Colonial. Em palavras profundamente subversivas para a época, afirmavam a igualdade dos homens e apregoavam como seus direitos inalienáveis: o direito à vida, à liberdade e à busca da felicidade. Afirmavam que o poder dos governantes, aos quais cabia a defesa daqueles direitos, derivava dos governados.
Esses conceitos revolucionários que ecoavam o Iluminismo foram retomados com maior vigor e amplitude treze anos mais tarde, em 1789, na França.

Emília Viotti da Costa. Apresentação da coleção. In: Wladimir Pomar. Revolução Chinesa. São Paulo: UNESP, 2003 (com adaptações).

Considerando o texto acima, acerca da independência dos EUA e da Revolução Francesa, assinale a opção correta.

Na figura seguinte, as retas r e s são paralelas entre si, e perpendiculares à reta t. Sabe-se, ainda, que AB = 6 cm, CD = 3 cm,  é perpendicular a  , e a medida do ângulo entre e a reta s é 30°.

                

Nas condições descritas, a medida de , em cm, é igual a

( ) O Brasil é membro fundador da ONU, e suas missões de paz nessa organização são reconhecidas internacionalmente.

( ) Nosso país é membro permanente do Conselho de Segurança da ONU, com ações no Haiti desde 2004.

( ) O Brasil é um componente do grupo chamado G20, constituído por países preocupados com as relações econômicas internacionais.

( ) O governo brasileiro preside a UNASUL, organização que tem por objetivo substituir o papel de integração regional do MERCOSUL.

( ) A população brasileira não tem representatividade consular no Continente Africano.

A sequência correta de preenchimento dos parênteses, de cima para baixo, é:

Read the text below and answer the following question.

Can Cellular Agriculture Feed the World?

    Within 20 years, there will be 2 billion more people than today — over 9 billion people in total. The impact to the environment could be severe. Just feeding that population using current methods is problematic.

    On average, cattle ranchers need 100 times more land than corn growers to produce a gram of food. So, if that hungry world continues to eat meat like we do, the demand for land — and fresh water — will be alarming, not to mention the environmental impact of raising so many animals. Meat production aside, the large-scale monoculture of crops like corn usually results in damaging terrestrial pollution from pesticides and soil depletion. The impact to the oceans is equally perilous.

   Instead of farming animals, fish and plants, cellular agriculture grows the proteins and nutrients we consume from a culture, cell by cell. With this alternative approach, the consumable meat and plant tissues produced don’t need to be harvested from animals or plants. It’s food production on an industrial scale.

  The technology to do this is not new. Growing meat from a scaffold embedded in growth culture is no different in theory than making bread from yeast. The vast majority of insulin for diabetics is already manufactured by genetically engineered bacteria, as is the rennet used to culture cheese. In the past 10 years, this approach has been pioneered with a variety of foodstuffs: milk, eggs, beef, chicken, fish — even coffee.

    To succeed, cellular agriculture must overcome 6,000 years of established dependence on traditional agriculture, and it has to do so via one of the most finicky human senses: taste. No one will eat manufactured meat or fish if it doesn’t have the same sensual satisfaction generated by the grown version. So, in addition to all the technical challenges in creating edible tissues from cultures, the startups pioneering this approach are working diligently to make their products tasty.

   The possibilities for cellular agriculture are seemingly limitless; it may be possible to grow human organs for transplant using the method. But it is still early days.

Adaptado de: <https://earth911.com/business-policy/cellular-agriculture/> Acessado em 19 de outubro de 2018.

Cellular agriculture

Sabendo-se que o resto da divisão do polinômio P(x) = x³ – x² + 2^k + 2 por x – 3 é igual a 4^k – 220, o valor de k é

Textos para a questão

Segundo o Dr. Panos Athanasopoulos,

Read the text below and answer the following question.

Can Cellular Agriculture Feed the World?

    Within 20 years, there will be 2 billion more people than today — over 9 billion people in total. The impact to the environment could be severe. Just feeding that population using current methods is problematic.

    On average, cattle ranchers need 100 times more land than corn growers to produce a gram of food. So, if that hungry world continues to eat meat like we do, the demand for land — and fresh water — will be alarming, not to mention the environmental impact of raising so many animals. Meat production aside, the large-scale monoculture of crops like corn usually results in damaging terrestrial pollution from pesticides and soil depletion. The impact to the oceans is equally perilous.

   Instead of farming animals, fish and plants, cellular agriculture grows the proteins and nutrients we consume from a culture, cell by cell. With this alternative approach, the consumable meat and plant tissues produced don’t need to be harvested from animals or plants. It’s food production on an industrial scale.

  The technology to do this is not new. Growing meat from a scaffold embedded in growth culture is no different in theory than making bread from yeast. The vast majority of insulin for diabetics is already manufactured by genetically engineered bacteria, as is the rennet used to culture cheese. In the past 10 years, this approach has been pioneered with a variety of foodstuffs: milk, eggs, beef, chicken, fish — even coffee.

    To succeed, cellular agriculture must overcome 6,000 years of established dependence on traditional agriculture, and it has to do so via one of the most finicky human senses: taste. No one will eat manufactured meat or fish if it doesn’t have the same sensual satisfaction generated by the grown version. So, in addition to all the technical challenges in creating edible tissues from cultures, the startups pioneering this approach are working diligently to make their products tasty.

   The possibilities for cellular agriculture are seemingly limitless; it may be possible to grow human organs for transplant using the method. But it is still early days.

Adaptado de: <https://earth911.com/business-policy/cellular-agriculture/> Acessado em 19 de outubro de 2018.

One of the things that makes cellular culture hard to succeed is

O gráfico abaixo se refere ao decaimento espontâneo de uma amostra de um dado isótopo radioativo com a abscissa indicando o tempo, em anos, e a ordenada indicando a massa, em gramas, do isótopo:



Partindo de 180 g de uma amostra desse isótopo radio- ativo, o que restará dela, em gramas, após dois anos é aproximadamente igual a:

Read the text below and answer the following question.

Can Cellular Agriculture Feed the World?

    Within 20 years, there will be 2 billion more people than today — over 9 billion people in total. The impact to the environment could be severe. Just feeding that population using current methods is problematic.

    On average, cattle ranchers need 100 times more land than corn growers to produce a gram of food. So, if that hungry world continues to eat meat like we do, the demand for land — and fresh water — will be alarming, not to mention the environmental impact of raising so many animals. Meat production aside, the large-scale monoculture of crops like corn usually results in damaging terrestrial pollution from pesticides and soil depletion. The impact to the oceans is equally perilous.

   Instead of farming animals, fish and plants, cellular agriculture grows the proteins and nutrients we consume from a culture, cell by cell. With this alternative approach, the consumable meat and plant tissues produced don’t need to be harvested from animals or plants. It’s food production on an industrial scale.

  The technology to do this is not new. Growing meat from a scaffold embedded in growth culture is no different in theory than making bread from yeast. The vast majority of insulin for diabetics is already manufactured by genetically engineered bacteria, as is the rennet used to culture cheese. In the past 10 years, this approach has been pioneered with a variety of foodstuffs: milk, eggs, beef, chicken, fish — even coffee.

    To succeed, cellular agriculture must overcome 6,000 years of established dependence on traditional agriculture, and it has to do so via one of the most finicky human senses: taste. No one will eat manufactured meat or fish if it doesn’t have the same sensual satisfaction generated by the grown version. So, in addition to all the technical challenges in creating edible tissues from cultures, the startups pioneering this approach are working diligently to make their products tasty.

   The possibilities for cellular agriculture are seemingly limitless; it may be possible to grow human organs for transplant using the method. But it is still early days.

Adaptado de: <https://earth911.com/business-policy/cellular-agriculture/> Acessado em 19 de outubro de 2018.

All of the following are synonyms of perilous except for

Um observador visualizou um relâmpago (luz de um raio) em uma tempestade, e ouviu o trovão (som deste raio) após 2 s . Decorridos 6 min ocorreu outro relâmpago e o trovão foi ouvido após 20 s. Considere que a visualização do relâmpago é instantânea e que a velocidade do som no ar é de 340 m/s.

A velocidade CORRETA que a tempestade se afasta do observador é:

Textos para a questão

Assinale a alternativa correta.

The use of social media

A equação algébrica ax³ + bx² + cx + d = 0 possui coeficientes reais a, b, c, d, todos não nulos. Sendo x₁ , x₂ e x₃ as raízes dessa equação, então  é igual a

Textos para a questão

Assinale a alternativa correta sobre o Texto III.

Not so enthusiastic social media users