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Questões do ENEM: nível médio

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27.392 questões encontradas. Mostrando a página 500 de 1370.

  • D5BE1F32-BB

    Português

    Interpretação de Textos
    UERJ · 2018MédioEntre para guardar nos favoritos

    Imagem da questão de Português, UERJ 2018, Interpretação de Textos

    David Cooper dirige uma crítica à psiquiatria quando esta define saúde como ausência de doença e, desse modo, acaba por não definir adequadamente a própria doença mental.


    Essa forma de definição incorre em um sofisma conhecido como:

    Escolha uma alternativa para a questão d5be1f32-bb
  • D5B64845-BB

    Português

    Coesão e coerência
    UERJ · 2018MédioEntre para guardar nos favoritos

    Imagem da questão de Português, UERJ 2018, Coesão e coerência

    Está 100% estabelecido que esses genes não têm nenhuma influência sobre qualquer traço comportamental ou intelectual. (ℓ. 37-38)


    Para introduzir a frase acima, mantendo a coerência com a que a precede, pode ser utilizada a seguinte expressão:

    Escolha uma alternativa para a questão d5b64845-bb
  • D5A2527E-BB

    Geografia

    Impactos e soluções nos meios natural e rural
    UERJ · 2018MédioEntre para guardar nos favoritos

    Imagem da questão de Geografia, UERJ 2018, Impactos e soluções nos meios natural e rural

    Memórias de um carbono


    Pouco tempo atrás, o átomo de carbono foi liberado de sua prisão química. No processo de transformação industrial do petróleo, ele foi incorporado à gasolina que era processada em uma refinaria. Não demorou muito e ele estava participando de uma reação de queima no motor de um automóvel e rapidamente estava novamente livre na atmosfera. A excessiva liberação desses átomos de carbono que ficaram aprisionados por milhões de anos no subsolo é um dos maiores problemas que a humanidade enfrenta atualmente.

    ADILSON DE OLIVEIRA

    Adaptado de cienciahoje.org.br.


    O futuro já está entre nós


    O gestor hospitalar Edgar Escobar comprou um carro elétrico em 2016. Ele tem um dos 4 784 veículos elétricos ou híbridos que circulam pelas ruas do Brasil hoje. São carros e ônibus que ajudam a preservar o meio ambiente. E cerca de 300 deles são 100% elétricos. Ou seja, a emissão de gases poluentes é zero. Todo o funcionamento do carro é sustentado pela bateria, que pode ser carregada numa tomada dentro de casa.

    Adaptado de cbn.globoradio.globo.com.

    14/07/2017.


    O desenvolvimento de veículos elétricos é uma das medidas para enfrentar o problema apontado acima, no primeiro texto.


    A eficácia ambiental dessa medida, considerando as tecnologias comercialmente viáveis a curto prazo no mundo, depende principalmente do seguinte fator:

    Escolha uma alternativa para a questão d5a2527e-bb
  • D59ADF7C-BB

    Física

    Cinemática
    UERJ · 2018MédioEntre para guardar nos favoritos

    Imagem da questão de Física, UERJ 2018, Cinemática

    Considera-se a morte de uma estrela o momento em que ela deixa de emitir luz, o que não é percebido de imediato na Terra. A distância das estrelas em relação ao planeta Terra é medida em anos-luz, que corresponde ao deslocamento que a luz percorre no vácuo durante o período de um ano.


    Admita que a luz de uma estrela que se encontra a 7500 anos-luz da Terra se apague. O tempo para que a morte dessa estrela seja visível na Terra equivale à seguinte ordem de grandeza, em meses:

    Escolha uma alternativa para a questão d59adf7c-bb
  • D5967823-BB

    Biologia

    Evolução biológica
    UERJ · 2018MédioEntre para guardar nos favoritos

    Figura 1 de 2 da questão de Biologia, UERJ 2018, Evolução biológica

    No processo de evolução biológica, ao longo das gerações, ocorrem alterações nas moléculas que contêm carbono. A imagem abaixo ilustra duas espécies de peixes, separadas pelo Istmo do Panamá. Ambas surgiram a partir de uma única população, existente no local antes da elevação geológica da América Central.


    Figura 2 de 2 da questão de Biologia, UERJ 2018, Evolução biológica


    O processo evolutivo que deu origem a essas duas espécies é denominado:

    Escolha uma alternativa para a questão d5967823-bb
  • D5924696-BB

    Química

    Grandezas: massa, volume, mol, massa molar, constante de Avogadro e Estequiometria.
    UERJ · 2018MédioEntre para guardar nos favoritos

    Imagem da questão de Química, UERJ 2018, Grandezas: massa, volume, mol, massa molar, constante de Avogadro e Estequiometria.

    Em seu ciclo, um átomo de carbono pode ser incorporado a diferentes compostos por meio de processos contínuos de decomposição e formação de novas moléculas. Os átomos de carbono deste caderno de prova, por exemplo, serão degradados ao longo do tempo e, posteriormente, incorporados a outros seres vivos.


    Considere que, ao se degradarem, os átomos de carbono deste caderno se distribuam igualmente entre os 7,5 bilhões de habitantes do planeta.


    Sabendo que o caderno possui 90 g de massa, com 45% de carbono em sua composição, o número de átomos que será incorporado em cada habitante é igual a:

    Escolha uma alternativa para a questão d5924696-bb
  • D58E4E7D-BB

    Português

    Flexão verbal de tempo (presente, pretérito, futuro)
    UERJ · 2018MédioEntre para guardar nos favoritos

    Imagem da questão de Português, UERJ 2018, Flexão verbal de tempo (presente, pretérito, futuro)

    Por exemplo, “A busca pela compreensão cósmica” é uma das aulas, na qual apresento a evolução dos modelos que temos do universo. (ℓ. 23-24)


    No trecho, a forma verbal sublinhada expressa uma ação que se caracteriza como:

    Escolha uma alternativa para a questão d58e4e7d-bb
  • F810BF7C-A6

    Inglês

    Interpretação de texto | Reading comprehension
    UEMG · 2018MédioEntre para guardar nos favoritos
    Taking into account the following image and the comment made by the husband, what will probably be Loretta’s gift this Christmas?


    Imagem da questão de Inglês, UEMG 2018, Interpretação de texto | Reading comprehension

    Disponível em <http://comicskingdom.com/blog/2014/12/02/tuesday-s-top-ten-comics-holiday-shopping-gift-giving>Acesso em: 15 nov. 2017.
    Escolha uma alternativa para a questão f810bf7c-a6
  • F80D839C-A6

    Inglês

    Adjetivos | Adjectives
    UEMG · 2018MédioEntre para guardar nos favoritos

                Brazil must legalise drugs – its existing policy just destroys lives


          For decades, guns and imprisonment have been the hallmarks of Brazil’s war against the drug trafficking. But the only way to beat the gangs is to stop creating criminals, says a top Brazilian judge

          “The war raging in Rocinha, Latin America’s largest favela, has already been lost. Rooted in a dispute between gangs for control of drug trafficking, it has disrupted the daily life of the community in Rio de Janeiro since mid-September. With the sound of shots coming from all sides, schools and shops are constantly forced to close. Recently, a stray bullet killed a Spanish tourist. The war is not the only thing being lost.

          For decades, Brazil has had the same drug policy approach. Police, weapons and numerous arrests. It does not take an expert to conclude the obvious: the strategy has failed. Drug trafficking and consumption have only increased. […]

          In a case still before the Brazilian supreme court, I voted for decriminalising the possession of marijuana for private consumption. […] 

          Drugs are an issue that has a profound impact on the criminal justice system, and it is legitimate for the supreme court to participate in the public debate. So here are the reasons for my views.

          First, drugs are bad and it is therefore the role of the state and society to discourage consumption, treat dependents and repress trafficking. The rationale behind legalisation is rooted in the belief that it will help in achieving these goals.

          Second, the war on drugs has failed. Since the 1970s, under the influence and leadership of the US, the world has tackled this problem with the use of police forces, armies, and armaments. The tragic reality is that 40 years, billions of dollars, hundreds of thousands of prisoners and thousands of deaths later, things are worse. At least in countries like Brazil.

          Third, as the American economist Milton Friedman argued, the only result of criminalisation is ensuring the trafficker’s monopoly. 

          With these points in mind, what would legalisation achieve?

          In most countries in North America and Europe, the greatest concern of the authorities is users and the impact drugs have on their lives and on society. These are all important considerations. In Brazil, however, the principal focus must be ending the dominance drug dealers exercise over poor communities. Gangs have become the main political and economic power in thousands of modest neighbourhoods in Brazil. This scenario prevents a family of honest and hard-working people from educating their children away from the influence of criminal factions, who intimidate, co-opt and exercise an unfair advantage over any lawful activity. Crucially, this power of trafficking comes from illegality.

           Another benefit of legalisation would be to prevent the mass incarceration of impoverished young people with no criminal record who are arrested for trafficking because they are caught in possession of negligible amounts of marijuana. A third of detainees in Brazil are imprisoned for drug trafficking. Once arrested, young prisoners will have to join one of the factions that control the penitentiaries – and on that day, they become dangerous.

          […]

          We cannot be certain that a progressive and cautious policy of decriminalisation and legalisation will be successful. What we can affirm is that the existing policy of criminalisation has failed. We must take chances; otherwise, we risk simply accepting a terrible situation. As the Brazilian navigator Amyr Klink said: “The worst shipwreck is not setting off at all.” 

    Disponível em: <https://www.theguardian.com/global-development/2017/nov/15/brazil-must-legalise-drugs-existing-policy-destroys-lives-luis-roberto-barroso-supreme-court-judge> . Acesso em: 14 nov. 2017.

    In the excerpt “Recently, a stray bullet killed a Spanish tourist”, the expression “stray bullet” is
    Escolha uma alternativa para a questão f80d839c-a6
  • F80A1DA4-A6

    Inglês

    Adjetivos | Adjectives
    UEMG · 2018MédioEntre para guardar nos favoritos

                Brazil must legalise drugs – its existing policy just destroys lives


          For decades, guns and imprisonment have been the hallmarks of Brazil’s war against the drug trafficking. But the only way to beat the gangs is to stop creating criminals, says a top Brazilian judge

          “The war raging in Rocinha, Latin America’s largest favela, has already been lost. Rooted in a dispute between gangs for control of drug trafficking, it has disrupted the daily life of the community in Rio de Janeiro since mid-September. With the sound of shots coming from all sides, schools and shops are constantly forced to close. Recently, a stray bullet killed a Spanish tourist. The war is not the only thing being lost.

          For decades, Brazil has had the same drug policy approach. Police, weapons and numerous arrests. It does not take an expert to conclude the obvious: the strategy has failed. Drug trafficking and consumption have only increased. […]

          In a case still before the Brazilian supreme court, I voted for decriminalising the possession of marijuana for private consumption. […] 

          Drugs are an issue that has a profound impact on the criminal justice system, and it is legitimate for the supreme court to participate in the public debate. So here are the reasons for my views.

          First, drugs are bad and it is therefore the role of the state and society to discourage consumption, treat dependents and repress trafficking. The rationale behind legalisation is rooted in the belief that it will help in achieving these goals.

          Second, the war on drugs has failed. Since the 1970s, under the influence and leadership of the US, the world has tackled this problem with the use of police forces, armies, and armaments. The tragic reality is that 40 years, billions of dollars, hundreds of thousands of prisoners and thousands of deaths later, things are worse. At least in countries like Brazil.

          Third, as the American economist Milton Friedman argued, the only result of criminalisation is ensuring the trafficker’s monopoly. 

          With these points in mind, what would legalisation achieve?

          In most countries in North America and Europe, the greatest concern of the authorities is users and the impact drugs have on their lives and on society. These are all important considerations. In Brazil, however, the principal focus must be ending the dominance drug dealers exercise over poor communities. Gangs have become the main political and economic power in thousands of modest neighbourhoods in Brazil. This scenario prevents a family of honest and hard-working people from educating their children away from the influence of criminal factions, who intimidate, co-opt and exercise an unfair advantage over any lawful activity. Crucially, this power of trafficking comes from illegality.

           Another benefit of legalisation would be to prevent the mass incarceration of impoverished young people with no criminal record who are arrested for trafficking because they are caught in possession of negligible amounts of marijuana. A third of detainees in Brazil are imprisoned for drug trafficking. Once arrested, young prisoners will have to join one of the factions that control the penitentiaries – and on that day, they become dangerous.

          […]

          We cannot be certain that a progressive and cautious policy of decriminalisation and legalisation will be successful. What we can affirm is that the existing policy of criminalisation has failed. We must take chances; otherwise, we risk simply accepting a terrible situation. As the Brazilian navigator Amyr Klink said: “The worst shipwreck is not setting off at all.” 

    Disponível em: <https://www.theguardian.com/global-development/2017/nov/15/brazil-must-legalise-drugs-existing-policy-destroys-lives-luis-roberto-barroso-supreme-court-judge> . Acesso em: 14 nov. 2017.

    Consider the following excerpt: “Since the 1970s, under the influence and leadership of the US, the world has tackled this problem with the use of police forces, armies, and armaments.” Mark the option which best describes the use of some words in the excerpt.
    Escolha uma alternativa para a questão f80a1da4-a6
  • F806E2C5-A6

    Inglês

    Pronomes | Pronouns
    UEMG · 2018MédioEntre para guardar nos favoritos

                Brazil must legalise drugs – its existing policy just destroys lives


          For decades, guns and imprisonment have been the hallmarks of Brazil’s war against the drug trafficking. But the only way to beat the gangs is to stop creating criminals, says a top Brazilian judge

          “The war raging in Rocinha, Latin America’s largest favela, has already been lost. Rooted in a dispute between gangs for control of drug trafficking, it has disrupted the daily life of the community in Rio de Janeiro since mid-September. With the sound of shots coming from all sides, schools and shops are constantly forced to close. Recently, a stray bullet killed a Spanish tourist. The war is not the only thing being lost.

          For decades, Brazil has had the same drug policy approach. Police, weapons and numerous arrests. It does not take an expert to conclude the obvious: the strategy has failed. Drug trafficking and consumption have only increased. […]

          In a case still before the Brazilian supreme court, I voted for decriminalising the possession of marijuana for private consumption. […] 

          Drugs are an issue that has a profound impact on the criminal justice system, and it is legitimate for the supreme court to participate in the public debate. So here are the reasons for my views.

          First, drugs are bad and it is therefore the role of the state and society to discourage consumption, treat dependents and repress trafficking. The rationale behind legalisation is rooted in the belief that it will help in achieving these goals.

          Second, the war on drugs has failed. Since the 1970s, under the influence and leadership of the US, the world has tackled this problem with the use of police forces, armies, and armaments. The tragic reality is that 40 years, billions of dollars, hundreds of thousands of prisoners and thousands of deaths later, things are worse. At least in countries like Brazil.

          Third, as the American economist Milton Friedman argued, the only result of criminalisation is ensuring the trafficker’s monopoly. 

          With these points in mind, what would legalisation achieve?

          In most countries in North America and Europe, the greatest concern of the authorities is users and the impact drugs have on their lives and on society. These are all important considerations. In Brazil, however, the principal focus must be ending the dominance drug dealers exercise over poor communities. Gangs have become the main political and economic power in thousands of modest neighbourhoods in Brazil. This scenario prevents a family of honest and hard-working people from educating their children away from the influence of criminal factions, who intimidate, co-opt and exercise an unfair advantage over any lawful activity. Crucially, this power of trafficking comes from illegality.

           Another benefit of legalisation would be to prevent the mass incarceration of impoverished young people with no criminal record who are arrested for trafficking because they are caught in possession of negligible amounts of marijuana. A third of detainees in Brazil are imprisoned for drug trafficking. Once arrested, young prisoners will have to join one of the factions that control the penitentiaries – and on that day, they become dangerous.

          […]

          We cannot be certain that a progressive and cautious policy of decriminalisation and legalisation will be successful. What we can affirm is that the existing policy of criminalisation has failed. We must take chances; otherwise, we risk simply accepting a terrible situation. As the Brazilian navigator Amyr Klink said: “The worst shipwreck is not setting off at all.” 

    Disponível em: <https://www.theguardian.com/global-development/2017/nov/15/brazil-must-legalise-drugs-existing-policy-destroys-lives-luis-roberto-barroso-supreme-court-judge> . Acesso em: 14 nov. 2017.

    Considering the excerpt “[...] it has disrupted the daily life of the community […]”, and the context it was taken from, mark the correct option regarding the pronoun “it”.
    Escolha uma alternativa para a questão f806e2c5-a6
  • F8039041-A6

    Inglês

    Verbos | Verbs
    UEMG · 2018MédioEntre para guardar nos favoritos

                Brazil must legalise drugs – its existing policy just destroys lives


          For decades, guns and imprisonment have been the hallmarks of Brazil’s war against the drug trafficking. But the only way to beat the gangs is to stop creating criminals, says a top Brazilian judge

          “The war raging in Rocinha, Latin America’s largest favela, has already been lost. Rooted in a dispute between gangs for control of drug trafficking, it has disrupted the daily life of the community in Rio de Janeiro since mid-September. With the sound of shots coming from all sides, schools and shops are constantly forced to close. Recently, a stray bullet killed a Spanish tourist. The war is not the only thing being lost.

          For decades, Brazil has had the same drug policy approach. Police, weapons and numerous arrests. It does not take an expert to conclude the obvious: the strategy has failed. Drug trafficking and consumption have only increased. […]

          In a case still before the Brazilian supreme court, I voted for decriminalising the possession of marijuana for private consumption. […] 

          Drugs are an issue that has a profound impact on the criminal justice system, and it is legitimate for the supreme court to participate in the public debate. So here are the reasons for my views.

          First, drugs are bad and it is therefore the role of the state and society to discourage consumption, treat dependents and repress trafficking. The rationale behind legalisation is rooted in the belief that it will help in achieving these goals.

          Second, the war on drugs has failed. Since the 1970s, under the influence and leadership of the US, the world has tackled this problem with the use of police forces, armies, and armaments. The tragic reality is that 40 years, billions of dollars, hundreds of thousands of prisoners and thousands of deaths later, things are worse. At least in countries like Brazil.

          Third, as the American economist Milton Friedman argued, the only result of criminalisation is ensuring the trafficker’s monopoly. 

          With these points in mind, what would legalisation achieve?

          In most countries in North America and Europe, the greatest concern of the authorities is users and the impact drugs have on their lives and on society. These are all important considerations. In Brazil, however, the principal focus must be ending the dominance drug dealers exercise over poor communities. Gangs have become the main political and economic power in thousands of modest neighbourhoods in Brazil. This scenario prevents a family of honest and hard-working people from educating their children away from the influence of criminal factions, who intimidate, co-opt and exercise an unfair advantage over any lawful activity. Crucially, this power of trafficking comes from illegality.

           Another benefit of legalisation would be to prevent the mass incarceration of impoverished young people with no criminal record who are arrested for trafficking because they are caught in possession of negligible amounts of marijuana. A third of detainees in Brazil are imprisoned for drug trafficking. Once arrested, young prisoners will have to join one of the factions that control the penitentiaries – and on that day, they become dangerous.

          […]

          We cannot be certain that a progressive and cautious policy of decriminalisation and legalisation will be successful. What we can affirm is that the existing policy of criminalisation has failed. We must take chances; otherwise, we risk simply accepting a terrible situation. As the Brazilian navigator Amyr Klink said: “The worst shipwreck is not setting off at all.” 

    Disponível em: <https://www.theguardian.com/global-development/2017/nov/15/brazil-must-legalise-drugs-existing-policy-destroys-lives-luis-roberto-barroso-supreme-court-judge> . Acesso em: 14 nov. 2017.

    Taking into account the excerpt: “Brazil must legalise drugs”, mark the option which best describes the word “must” in the aforementioned context.
    Escolha uma alternativa para a questão f8039041-a6
  • F7FFF2B5-A6

    Inglês

    Interpretação de texto | Reading comprehension
    UEMG · 2018MédioEntre para guardar nos favoritos

                Brazil must legalise drugs – its existing policy just destroys lives


          For decades, guns and imprisonment have been the hallmarks of Brazil’s war against the drug trafficking. But the only way to beat the gangs is to stop creating criminals, says a top Brazilian judge

          “The war raging in Rocinha, Latin America’s largest favela, has already been lost. Rooted in a dispute between gangs for control of drug trafficking, it has disrupted the daily life of the community in Rio de Janeiro since mid-September. With the sound of shots coming from all sides, schools and shops are constantly forced to close. Recently, a stray bullet killed a Spanish tourist. The war is not the only thing being lost.

          For decades, Brazil has had the same drug policy approach. Police, weapons and numerous arrests. It does not take an expert to conclude the obvious: the strategy has failed. Drug trafficking and consumption have only increased. […]

          In a case still before the Brazilian supreme court, I voted for decriminalising the possession of marijuana for private consumption. […] 

          Drugs are an issue that has a profound impact on the criminal justice system, and it is legitimate for the supreme court to participate in the public debate. So here are the reasons for my views.

          First, drugs are bad and it is therefore the role of the state and society to discourage consumption, treat dependents and repress trafficking. The rationale behind legalisation is rooted in the belief that it will help in achieving these goals.

          Second, the war on drugs has failed. Since the 1970s, under the influence and leadership of the US, the world has tackled this problem with the use of police forces, armies, and armaments. The tragic reality is that 40 years, billions of dollars, hundreds of thousands of prisoners and thousands of deaths later, things are worse. At least in countries like Brazil.

          Third, as the American economist Milton Friedman argued, the only result of criminalisation is ensuring the trafficker’s monopoly. 

          With these points in mind, what would legalisation achieve?

          In most countries in North America and Europe, the greatest concern of the authorities is users and the impact drugs have on their lives and on society. These are all important considerations. In Brazil, however, the principal focus must be ending the dominance drug dealers exercise over poor communities. Gangs have become the main political and economic power in thousands of modest neighbourhoods in Brazil. This scenario prevents a family of honest and hard-working people from educating their children away from the influence of criminal factions, who intimidate, co-opt and exercise an unfair advantage over any lawful activity. Crucially, this power of trafficking comes from illegality.

           Another benefit of legalisation would be to prevent the mass incarceration of impoverished young people with no criminal record who are arrested for trafficking because they are caught in possession of negligible amounts of marijuana. A third of detainees in Brazil are imprisoned for drug trafficking. Once arrested, young prisoners will have to join one of the factions that control the penitentiaries – and on that day, they become dangerous.

          […]

          We cannot be certain that a progressive and cautious policy of decriminalisation and legalisation will be successful. What we can affirm is that the existing policy of criminalisation has failed. We must take chances; otherwise, we risk simply accepting a terrible situation. As the Brazilian navigator Amyr Klink said: “The worst shipwreck is not setting off at all.” 

    Disponível em: <https://www.theguardian.com/global-development/2017/nov/15/brazil-must-legalise-drugs-existing-policy-destroys-lives-luis-roberto-barroso-supreme-court-judge> . Acesso em: 14 nov. 2017.

    The text expresses the opinion of a top Brazilian judge about drugs. Mark the correct answer concerning the subject matter discussed throughout the essay.
    Escolha uma alternativa para a questão f7fff2b5-a6
  • F7FC9AB2-A6

    Geografia

    Clima
    UEMG · 2018MédioEntre para guardar nos favoritos

    A propalada crise climática global atual tem, como uma de suas causas, a emissão de dióxido de carbono (CO²) na atmosfera. A criação de Créditos de Carbono foi umas das supostas saídas encontradas para o problema.


    Sobre os Créditos de Carbono, informe se é verdadeiro (V) ou falso (F) o que se afirma a seguir e assinale a alternativa com a sequência correta.


    ( ) Cada Crédito de Carbono é equivalente a 1T (uma tonelada) de CO² não emitida ou retirada da atmosfera por um País.

    ( ) Os Créditos de Carbono foram criados, em 1997, no Japão, quando houve a assinatura do Protocolo de Kyoto pelos países que se comprometeram a assinar esse acordo.

    ( ) Os Estados Unidos, maior emissor de gases poluentes do mundo, lidera a aplicação das políticas definidas no Protocolo de Kyoto.

    ( ) Créditos de Carbono são certificados negociados como mercadorias nas bolsas de valores.

    Escolha uma alternativa para a questão f7fc9ab2-a6
  • F7F26E2E-A6

    Geografia

    Impactos e soluções nos meios natural e rural
    UEMG · 2018MédioEntre para guardar nos favoritos

    “O acidente em Mariana ficou conhecido no Brasil como o maior desastre ambiental da história e deixou 19 pessoas mortas, além de destruir o distrito de Bento Rodrigues, contaminar a Bacia Hidrográfica do Rio Doce e comprometer o abastecimento de água e a produção de alimentos em diversas cidades da região.”

    Disponível em: <http://agenciabrasil.ebc.com.br/geral/noticia/2017-08/juiz-suspende-acao-criminal-contra-mineradoras-por-acidente-em-mariana >. Acesso em: 21 nov. 2017.


    Sobre o rompimento da Barragem Fundão em Mariana, é correto afirmar que

    Escolha uma alternativa para a questão f7f26e2e-a6
  • F7EEF53D-A6

    Geografia

    Agropecuária
    UEMG · 2018MédioEntre para guardar nos favoritos
    Sobre a Estrutura Fundiária Brasileira, assinale a alternativa correta.
    Escolha uma alternativa para a questão f7eef53d-a6
  • F7EB6CC0-A6

    Geografia

    Desenvolvimento
    UEMG · 2018MédioEntre para guardar nos favoritos
    O GPS (Global Positioning System) desenvolvido pelo Departamento de Defesa dos Estados Unidos causou uma enorme transformação no que tem sido a busca da humanidade por localização instantânea, medição dos terrenos em tempo real e visualização de dados métricos do planeta terra com imensa acurácia. A exemplo de muitos outros artefatos desenvolvidos com fins militares, o GPS penetrou a vida cotidiana em todos os lugares do mundo onde seja possível o uso dessa ferramenta, como se tem tornado comum nos diversos aplicativos para celulares. O problema é que dados estratégicos não são liberados para civis e, em tempos de guerra ou conflito, os Estados Unidos podem restringir ou mesmo cortar o fornecimento das informações, já que é o detentor da tecnologia. Em vista disso, outros países têm buscado desenvolver seus próprios sistemas de posicionamento, mas, até o momento, há um único sistema concorrente em pleno funcionamento, desenvolvido pela Rússia. Como esse sistema é nomeado?
    Escolha uma alternativa para a questão f7eb6cc0-a6
  • F7D2AA31-A6

    Química

    Eletroquímica: Oxirredução, Potenciais Padrão de Redução, Pilha, Eletrólise e Leis de Faraday.
    UEMG · 2018MédioEntre para guardar nos favoritos

    Considerando as seguintes semirreações, em uma célula galvânica com eletrodos de alumínio e chumbo, é correto afirmar que


    Al3+ + 3e- ⇄ Al0 E0red = -0,13V

    Pb2+ + 2e- ⇄ Pb0 E0red = -1,66V

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