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Questões do ENEM: nível muito difícil

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552 questões encontradas. Mostrando a página 16 de 28.

  • BFC8731B-E9

    Inglês

    Interpretação de texto | Reading comprehension    Universidade Luterana do Brasil · 2011Muito difícilEntre para guardar nos favoritos
        As we all know, electricity is a fundamental need. On a daily basis, we consume electricity even without us knowing it. Just a simple task such as listening to your music player consumes electricity. Today, most of our electric generators and power plants are fed with fossil fuels such as petroleum and coal. However, due to the exponential increase of power demand, fossil fuel supplies are slowly being depleted. Not only that, but also burning fossil fuels has given off greenhouse gases and other unwanted byproducts. Because of this, the search for alternative energy sources is now a necessity. One of the most promising alternative energy sources today is Wind Powered Generators. So, what is a wind-powered generator? Basically it is the use of wind as a mechanical force needed to power an electric generator. Utilizing wind as an energy source is not exactly a new idea. The ancient Persians were the first to use wind to pump water, cut wood, and grind food and others by building windmills. Even today you can find windmills still being used on some farms. It was the use of wind as an electric source that came into existence much later. The first practical wind powered generators were built in 1970, but yet we rarely see them in widespread use today, why? Let’s look at the advantages and disadvantages of the wind powered generator.
        The main advantage of wind powered generators is that they have, ideally, zero gas emissions – unlike fossil-fueled power generators. Because of the alarming effects of greenhouse gases and global warming, we want our power generators to be as clean and as environmentally friendly as possible. Since there is no burning process in a wind powered generator that produces toxic gases, it is very safe to build one in residential areas. Also, with proper engineering and enough wind, these generators can provide a high rate of wattage that can go as high as the Megawatt range. Another advantage is that it can be implemented using several small turbines connected together. This is a good thing when there is not enough space for huge structures.
         The major disadvantage of wind powered generators is that wind power varies greatly from one place to another and from day to day and season to season. Sometimes wind may be strong enough to supply energy, but that strength cannot be maintained due to changes in weather patterns. Needing strong, constant wind to most effectively power wind generators is one reason they are often built in coastal areas. Another disadvantage is that the structure of most practical wind powered generators is huge and bulky. Commonly, its size is proportional to the wind power it can collect.
        Research in wind power has now intensified because of its innate advantages over other power generators. With this increase in interest in wind energy and alternative energy sources as a whole, our future will become brighter and more and more remote areas will eventually enjoy the benefits of clean electric energy. In an electricity-dependent world, power supplies must provide the required electricity for communities and businesses. Wind powered generators might just be the solution for power shortages.

    Disponível em: http://mysolarcellhome.org/articles/pros-and-cons-of-wind-powered-generators. 
    According to the text,
    Escolha uma alternativa para a questão bfc8731b-e9
  • BA922315-E7

    Inglês

    Interpretação de texto | Reading comprehension    Universidade Estadual de Feira de Santana · 2011Muito difícilEntre para guardar nos favoritos
    Imagem da questão de Inglês, da prova de 2011

    Fill in the parentheses with T (True) or F (False) ( ) The burglar had a lot of trouble riding the bike.


    ( ) After having fallen off the bike, the burglar gave up trying to steal it.

    ( ) It was pretty easy for Mr. Green to draw a picture of the burglar.

    ( ) It took the police no more than thirty minutes to find the burglar.


    According to the text, the correct sequence, from top to bottom, is

    Escolha uma alternativa para a questão ba922315-e7
  • 835719F3-E3

    Inglês

    Interpretação de texto | Reading comprehension    Universidade Estadual de Feira de Santana · 2011Muito difícilEntre para guardar nos favoritos

    Imagem da questão de Inglês, da prova de 2011


    EVANS, Stephen. Disponível em:  <www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2011/05/110518_witn_electric_cars_page.shtml>. Acesso em: 2 jun. 2011.

    The only alternative in which the word from the text, on the left, is not suitably defined is
    Escolha uma alternativa para a questão 835719f3-e3
  • 4AE6A52F-E3

    Espanhol

    Interpretação de Texto | Comprensión de Lectura    Universidade Estadual de Feira de Santana · 2011Muito difícilEntre para guardar nos favoritos

    Imagem da questão de Espanhol, da prova de 2011

    Imagem da questão de Espanhol, da prova de 2011


    MUNNE, Juan José. La comida chatarra. Disponível em:< http:// www.aprenderacomer.com/modules.php?name=News&file=article&sid =311>. Acesso em: 8 nov. 2010. Adaptado.

    En el texto,
    Escolha uma alternativa para a questão 4ae6a52f-e3
  • 7337B8C7-E0

    Conhecimentos Gerais

    Política    UEPB · 2011Muito difícilEntre para guardar nos favoritos
    Fatos da política mundial e dos países se relacionam com as Copas do Mundo. Governantes já se utilizaram de vitórias de seleções de futebol para, por exemplo, ganharem a simpatia da população. Assinale a única alternativa INCORRETA.
    Escolha uma alternativa para a questão 7337b8c7-e0
  • 8019CB5C-E0

    Inglês

    Interpretação de texto | Reading comprehension    Universidade Estadual de Feira de Santana · 2011Muito difícilEntre para guardar nos favoritos

    Imagem da questão de Inglês, da prova de 2011

    Imagem da questão de Inglês, da prova de 2011


    GREGORY, Mark. BlackBerry announces iPad rival. Disponível em:<www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2010/09/100929_with_blackberry_page.shtml>. Acesso em: 2 dez. 2010.

    Fill in the parentheses with T (True) or F (False).

    The text has answers to the following questions:

    ( ) What does Blackberry new computer look like?

    ( ) What’s the main purpose of the launching of the Blackberry new tablet?

    ( ) Which customers is Blackberry targeting at?

    ( ) Why can’t Blackberry tablets run flash video?

    ( ) How many potential buyers have already ordered the new Blackberry tablet computer?


    According to the text, the correct sequence, from top to bottom, is

    Escolha uma alternativa para a questão 8019cb5c-e0
  • 8DF5881A-DC

    Inglês

    Interpretação de texto | Reading comprehension    UFRN · 2011Muito difícilEntre para guardar nos favoritos
    Imagem da questão de Inglês, da prova de 2011
    Ao ler o artigo de Ruth Benedict, a autora francesa
    Escolha uma alternativa para a questão 8df5881a-dc
  • 8DEF816C-DC

    Inglês

    Interpretação de texto | Reading comprehension    UFRN · 2011Muito difícilEntre para guardar nos favoritos
    Imagem da questão de Inglês, da prova de 2011
    A conclusão da autora em relação ao momento atual é que as mulheres podem
    Escolha uma alternativa para a questão 8def816c-dc
  • 8DE91B3E-DC

    Inglês

    Interpretação de texto | Reading comprehension    UFRN · 2011Muito difícilEntre para guardar nos favoritos
    Imagem da questão de Inglês, da prova de 2011
    A pesquisa realizada pelas autoras mostrou que
    Escolha uma alternativa para a questão 8de91b3e-dc
  • 9AF9FC64-B6

    Física

    Colisão    Instituto Federal de Educação, Ciência e Tecnologia - Goiás · 2011Muito difícilEntre para guardar nos favoritos
    Em uma região do espaço onde existe um campo elétrico uniforme E , dois pêndulos simples de massa m = 4 g e comprimento ℓ são postos a oscilar. A massa do primeiro pêndulo está carregada com carga elétrica q1 = + 40 µC e a massa do segundo pêndulo com q2 = − 40 µC. Considere que a aceleração da gravidade local é g = 10 m/s2 e que o vetor campo elétrico tem a mesma direção e o mesmo sentido do vetor campo gravitacional, sendo sua intensidade igual a 600 V/m.

    Analise as proposições a seguir:

    I. Os dois pêndulos oscilam com períodos iguais.
    II. O fio do primeiro pêndulo suporta uma tração maior que o fio do segundo.
    III. O período do primeiro pêndulo é a metade do período do segundo. 

    Está(ão) correta(s): 
    Escolha uma alternativa para a questão 9af9fc64-b6
  • 9AB8C5E4-B6

    Inglês

    Interpretação de texto | Reading comprehension    Instituto Federal de Educação, Ciência e Tecnologia - Goiás · 2011Muito difícilEntre para guardar nos favoritos

    Read text 3 to answer question. 


    Text 3  

    Imagem da questão de Inglês, da prova de 2011

    Available in: http://rio.movie-trailer.com/2010/05/riomovie-poster.html. Access on: May 02, 2011. 

    It is correct to affirm that:
    Escolha uma alternativa para a questão 9ab8c5e4-b6
  • 9AB44AC7-B6

    Inglês

    Aspectos linguísticos | Linguistic aspects    Instituto Federal de Educação, Ciência e Tecnologia - Goiás · 2011Muito difícilEntre para guardar nos favoritos

    Read text 2 to answer question.


    Text 2

    For Obama, Big Rise in Poll Numbers After Bin Laden Raid 

        Support for President Obama has risen sharply following the killing of Osama bin Laden by American military forces in Pakistan. Support for the president rose significantly among both Republicans and independents.

        Among independents, his approval rating increased 11 points from last month, to 52 percent, while among Republicans it rose 15 points, to 24 percent. Among Democrats, 86 percent supported his job performance, compared with 79 percent in April.

        In all, 57 percent said they now approved of the president’s job performance, up from 46 percent last month. More than six in 10 Americans said that killing Bin Laden was likely to increase the threat of terrorism against the United States in the short term. Nearly half said the nation should decrease troop levels in Afghanistan, but more than six in 10 also said the United States had not completed its mission in Afghanistan.

    Adapted from: The New York Times. Available in http://www.nytimes.com/2011/05/05/us/politics/05poll.html ?hp. Access on: May 04, 2011. 

    About the fragment “more than six in 10 also said the United States had not completed its mission in Afghanistan”, in the last paragraph, it is incorrect to affirm that:
    Escolha uma alternativa para a questão 9ab44ac7-b6
  • 9AAE6C6E-B6

    Inglês

    Interpretação de texto | Reading comprehension    Instituto Federal de Educação, Ciência e Tecnologia - Goiás · 2011Muito difícilEntre para guardar nos favoritos

    Read text 2 to answer question.


    Text 2

    For Obama, Big Rise in Poll Numbers After Bin Laden Raid 

        Support for President Obama has risen sharply following the killing of Osama bin Laden by American military forces in Pakistan. Support for the president rose significantly among both Republicans and independents.

        Among independents, his approval rating increased 11 points from last month, to 52 percent, while among Republicans it rose 15 points, to 24 percent. Among Democrats, 86 percent supported his job performance, compared with 79 percent in April.

        In all, 57 percent said they now approved of the president’s job performance, up from 46 percent last month. More than six in 10 Americans said that killing Bin Laden was likely to increase the threat of terrorism against the United States in the short term. Nearly half said the nation should decrease troop levels in Afghanistan, but more than six in 10 also said the United States had not completed its mission in Afghanistan.

    Adapted from: The New York Times. Available in http://www.nytimes.com/2011/05/05/us/politics/05poll.html ?hp. Access on: May 04, 2011. 

    According to the text, it is correct to affirm that:
    Escolha uma alternativa para a questão 9aae6c6e-b6
  • AA31722D-B5

    Inglês

    Interpretação de texto | Reading comprehension    IF-TM · 2011Muito difícilEntre para guardar nos favoritos
    RADIATION AND ATOMIC WASTE

       Life on earth has always been exposed to a certain amount of radiation from natural sources, which comes in part from cosmic rays. Also present in our environment is radiation from the radioactive elements that occur naturally such as radium, thorium, and uranium.
       One of the most serious problems that can result from radiation given off by nuclear reactions is damage to the genes, the cells in living organisms that control hereditary factors. Exposure to radiation can cause a mutation, a change in some inherited characteristics of the organisms. Only a very small proportion of mutations are beneficial to the organism.
       The nuclear reactors that have been developed for experimental, peaceful and energy production purposes are surrounded by a heavy protective shield of concrete, or sometimes of lead, to protect the people who work with them.
      A further problem involves the disposal of radioactive wastes. As the number of nuclear reactors in existence has increased, so has the amount of dangerous waste products. They cannot simply be released into the environment because they could create a potential hazard for all living things in the world. Experimentation is trying constantly to find safe methods of getting rid of the harmful by-products of nuclear reactors. (p. 75)

    Adaptado de LIBERATO, Wilson Antônio. De olho no vestibular (Inglês -Textos). São Paulo: FTD, 1996. 144 p. 
    Select the correct statement analyzing the information given by the text above.
    Escolha uma alternativa para a questão aa31722d-b5
  • AA2E8BDF-B5

    Inglês

    Interpretação de texto | Reading comprehension    IF-TM · 2011Muito difícilEntre para guardar nos favoritos
    RADIATION AND ATOMIC WASTE

       Life on earth has always been exposed to a certain amount of radiation from natural sources, which comes in part from cosmic rays. Also present in our environment is radiation from the radioactive elements that occur naturally such as radium, thorium, and uranium.
       One of the most serious problems that can result from radiation given off by nuclear reactions is damage to the genes, the cells in living organisms that control hereditary factors. Exposure to radiation can cause a mutation, a change in some inherited characteristics of the organisms. Only a very small proportion of mutations are beneficial to the organism.
       The nuclear reactors that have been developed for experimental, peaceful and energy production purposes are surrounded by a heavy protective shield of concrete, or sometimes of lead, to protect the people who work with them.
      A further problem involves the disposal of radioactive wastes. As the number of nuclear reactors in existence has increased, so has the amount of dangerous waste products. They cannot simply be released into the environment because they could create a potential hazard for all living things in the world. Experimentation is trying constantly to find safe methods of getting rid of the harmful by-products of nuclear reactors. (p. 75)

    Adaptado de LIBERATO, Wilson Antônio. De olho no vestibular (Inglês -Textos). São Paulo: FTD, 1996. 144 p. 
    Choose the correct statement, according to the passage above:
    Escolha uma alternativa para a questão aa2e8bdf-b5
  • AA239FE5-B5

    Inglês

    Interpretação de texto | Reading comprehension    IF-TM · 2011Muito difícilEntre para guardar nos favoritos
    The price of consumerism

    Norman Myers

    [...]Moreover, consumption is not an issue for rich countries alone. In developing and transition countries there are well over one billion people with enough income to enjoy an affluent lifestyle. Their aggregate spending in purchasing-power parity (as measured in local terms) already matches that of the United States. Certain effects of their consumerism, such as pollutant emissions from cars, which cause urban smog and global warming, are a salient concern both locally and worldwide. China alone, with 300 million new consumers and possibly twice as many within ten years, could soon exert an environmental impact to rival that of the United States.

    http://www.nature.com/nature/journal/v418/n6900/full/418819a.html

    O trecho acima refere-se a questão
    De acordo com o texto é correto afirmar que:
    Escolha uma alternativa para a questão aa239fe5-b5
  • AA17A8D8-B5

    Inglês

    Interpretação de texto | Reading comprehension    IF-TM · 2011Muito difícilEntre para guardar nos favoritos

    Imagem da questão de Inglês, da prova de 2011

    http://www.coloribus.com/adsarchive/prints/nature-preservation-environmental-issues-8175605/


    De acordo com as informações oferecidas na gravura acima, podemos dizer que a Fundação Mata Atlântica nos sugere que:

    Escolha uma alternativa para a questão aa17a8d8-b5
  • EAEBD155-B5

    Literatura

    Escolas Literárias    UESPI · 2011Muito difícilEntre para guardar nos favoritos
    Além de poeta, professor de tai chi chuan e mestre em shiatsu, Salgado Maranhão também é compositorletrista. No entanto, é como poeta que o seu nome é mais conhecido. Dentre as obras abaixo, quais são de sua autoria?
    Escolha uma alternativa para a questão eaebd155-b5
  • 49D9DFAB-B4

    Matemática

    Geometria Plana    IF-TM · 2011Muito difícilEntre para guardar nos favoritos

    A globalização aproximou as nações e os mercados. 

    Imagem da questão de Matemática, da prova de 2011

         “A globalização é um fenômeno social que ocorre em escala global. Esse processo consiste em uma integração em caráter econômico, social, cultural e político entre diferentes países.

        A globalização é oriunda de evoluções ocorridas, principalmente, nos meios de transportes e nas telecomunicações, fazendo com que o mundo “encurtasse” as distâncias. No passado, para a realização de uma viagem entre dois continentes eram necessárias cerca de quatro semanas, hoje esse tempo diminuiu drasticamente. Um fato ocorrido na Europa chegava ao conhecimento dos brasileiros 60 dias depois, hoje a notícia é divulgada em tempo real.

         A integração mundial decorrente do processo de globalização ocorreu em razão de dois fatores: as inovações tecnológicas e o incremento no fluxo comercial mundial.” 

    http://www.brasilescola.com/geografia/globalizacao.htm. Acesso em: 5 nov.2011.

    “O incremento no fluxo comercial mundial tem como principal fator a modernização dos transportes, especialmente o marítimo, pelo qual ocorre grande parte das transações comerciais (importação e exportação). O transporte marítimo possui uma elevada capacidade de carga, que permite também a mundialização das mercadorias, ou seja, um mesmo produto é encontrado em diferentes pontos do planeta.”
    Um contêiner, usado no transporte marítimo, tem altura igual a 3m e área total (área da superfície lateral mais áreas da base e da tampa) igual a 60 m2 . Considerando π = 3, o raio da base deste contêiner, em metros, é:
    Escolha uma alternativa para a questão 49d9dfab-b4
  • 49B1C6F7-B4

    Inglês

    Interpretação de texto | Reading comprehension    IF-TM · 2011Muito difícilEntre para guardar nos favoritos
             Flourishing is the word that best describes the independent music industry at this moment in time. The fact that new projects require smaller budgets than before has led to the creation of countless labels and independent companies. (…)
          The entire nation has managed to grasp the most positive aspects of the drive towards globalization. Our country is diverse, creative, proactive and, above all, very young. In the past few years, the new generation has become increasingly involved in music production, which means that there is a growing dynamism and energy in the current music scene. (…)
            There are a number of obstacles, the main one being the high level of consumption of pirated goods, which accounts for more than 70% of the market. (…).
              Another difficulty is the limited purchasing power of a large part of the population who access content through piracy because the prices are better suited to their means. For this reason, they are not bothered about the poor quality or the illegality of the product they buy.   
             (By Humberto Moreno, a Colombian independent music producer who helped present a Global Alliance project at the World Music Expo (WOMEX) in October 2006 in Seville, Spain).


    Adapted from English for All, Eliana/Maria Clara/Neuza, V. 2, Saraiva, São Paulo, 2010 . p. 116/117. 
    “New projects require smaller budgets than before”. This sentence expresses a comparison degree. Choose the sentence that degree is not expressed correctly:
    Escolha uma alternativa para a questão 49b1c6f7-b4