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  • Ciências Humanas

    História

    Entre para guardar nos favoritos
    Em uma aldeia no Espírito Santo, o padre jesuíta José de Anchieta fez representar uma peça que escreveu na língua tupi, em homenagem a Nossa Senhora da Assunção. Leia o trecho:

    Vem, Virgem Maria,
    mãe de Deus, visitar esta aldeia
    [...]
    Afasta as enfermidades
    febres, disenterias,
    as corruções e a tosse,
    para que seus habitantes
    creiam em Deus, teu filho.

    (Apud Luiz Felipe de Alencastro. O trato dos viventes: formação do Brasil no Atlântico Sul, 2000.)

    Esses versos, que seriam recitados por um menino índio vestido de anjo,
    Escolha uma alternativa para a questão 7c3f9f55-f6
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  • Ciências Humanas

    História

    Entre para guardar nos favoritos
    Muitos autores consideram que o período de 1849 (repressão à Revolução Praieira) a 1864 (início da Guerra do Paraguai) corresponde ao auge do Segundo Reinado.

    Essa estabilidade política e econômica foi alcançada graças
    Escolha uma alternativa para a questão 7c45e139-f6
    Abrir questão de História, prova de 2015
  • Ciências Humanas

    História

    Entre para guardar nos favoritos
    Os Estados ficaram implicitamente autorizados a exercer atribuições diversas, como as de contrair empréstimos no exterior e organizar forças militares próprias. Uma atribuição importante para os Estados exportadores foi a de decretar impostos sobre a exportação de suas mercadorias. Os Estados ficaram também com a faculdade de organizar uma justiça própria.

    (Boris Fausto. História do Brasil, 1994. Adaptado.)

    O excerto refere-se a um princípio constitucional da República oligárquica no Brasil, a saber:
    Escolha uma alternativa para a questão 7c49b0c6-f6
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  • Ciências Humanas

    História

    Entre para guardar nos favoritos
    No Brasil, o modelo econômico do regime militar (1964-1985) privilegiou
    Escolha uma alternativa para a questão 7c4de2a7-f6
    Abrir questão de História, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Interpretação de texto | Reading comprehension

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    According to the first paragraph, antibiotics
    Escolha uma alternativa para a questão 7c59a5b1-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Verbos modais | Modal verbs

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    No trecho do primeiro parágrafo “Routine surgery and childbirth could be a hazardous business”, o termo em destaque pode ser substituído, sem alteração de sentido, por
    Escolha uma alternativa para a questão 7c5db41d-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Interpretação de texto | Reading comprehension

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    According to the text, Albert Alexander
    Escolha uma alternativa para a questão 7c6191e1-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Palavras conectivas | Connective words

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    No trecho inicial do segundo parágrafo “So most of us have grown up with these miracle drugs readily available”, o termo em destaque pode ser substituído, sem alteração de sentido, por
    Escolha uma alternativa para a questão 7c66017c-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Tradução | Translation

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    No trecho final do segundo parágrafo “But that is what’s at stake”, a expressão em destaque equivale, em português, a
    Escolha uma alternativa para a questão 7c6acbe8-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Palavras conectivas | Connective words

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    No trecho final do segundo parágrafo “unless the threat is taken seriously”, o termo em destaque introduz uma ideia de
    Escolha uma alternativa para a questão 7c6f8d2c-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Interpretação de texto | Reading comprehension

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    Conforme as informações do terceiro parágrafo, a medicina atual
    Escolha uma alternativa para a questão 7c73f275-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Tradução | Translation

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    No trecho inicial do quinto parágrafo “some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed”, a expresssão em destaque equivale, em português, a
    Escolha uma alternativa para a questão 7c7b5bda-f6
    Abrir questão de Inglês, prova de 2015
  • Linguagens

    Inglês

    Entre para guardar nos favoritos
    Leia o texto para responder à questão.

    Imagem da questão de Inglês, Universidade Nove de Julho – UNINOVE 2015, Interpretação de texto | Reading comprehension

        You need only go back 70 years to a time when a scratch and a common infection could prove deadly. Routine surgery and childbirth could be a hazardous business. Penicillin had been discovered in 1928 by Sir Alexander Fleming, but human trials did not begin for over a decade. The first patient was an Oxford policeman, Albert Alexander, who had scratched his face on a rose bush and the wound became seriously infected (another historical version has him injured in a bombing raid). He was treated with penicillin and his condition rapidly improved, but supplies ran out before he could be cured and he died. By the end of the war penicillin was being widely produced, and other drugs quickly followed - marking the start of the antibiotic era.

        So most of us have grown up with these miracle drugs readily available. It’s understandable that patients and some doctors simply can’t comprehend the concept of a pre-antibiotic world. But that is what’s at stake unless the threat is taken seriously.

    • Rise of superbugs

        Much of modern medicine is now underpinned by antibiotics. Surgery is more invasive than ever: from hip replacements to cancer treatment and transplants - antibiotics are essential to prevent and treat infection. There have been repeated calls on doctors to curb the overuse of antibiotics going back many years.

        Whilst it is important that the NHS (National Health System in England) exercises better stewardship of antibiotics, it is worth remembering that this is a global problem that requires global solutions. Superbug infections respect no borders and have spread from continent to continent with ease. This is a serious concern because many developing countries have far poorer controls on antibiotic use.

    • Misuse

        Last year the World Health Organization found that some antibiotics could be bought legally over the counter in 19 out of 43 European countries surveyed. Then there is the widespread misuse of antibiotics in agriculture, in farmed animals and fish. More antibiotics are used in livestock production than for human health and there is widespread concern about the use of long-term, low-dose antibiotics in animal feed in countries like the US, China and India.

        Part of the problem is due to simple evolutionary pressure: bacteria are constantly evolving, and resistant strains emerging. This means there is a constant battle to stay ahead of the germs. But developing new antibiotics has proved hugely difficult - it’s nearly 30 years since the last new class of antibiotics came on the market.
    According to the sixth paragraph,
    Escolha uma alternativa para a questão 7c7ea6ee-f6
    Abrir questão de Inglês, prova de 2015
  • Ciências da Natureza

    Física

    Entre para guardar nos favoritos

    Um projétil é lançado do solo, verticalmente para cima, com velocidade inicial de 30 m/s. Após ter subido 25 m, uma carga explosiva o separa em dois pedaços, ambos de massas idênticas. Imediatamente após a explosão, um dos pedaços perde seu movimento ascendente, ficando com velocidade nula, enquanto o segundo pedaço tem movimento verticalmente para cima.


    Imagem da questão de Física, Universidade Nove de Julho – UNINOVE 2015, Cinemática


     Considerando desprezível a resistência do ar e a aceleração da gravidade local igual a 10 m/s2 ,a velocidade final, em m/s, do segundo pedaço, imediatamente após a explosão, é

    Escolha uma alternativa para a questão 7c896f12-f6
    Abrir questão de Física, prova de 2015
  • Ciências da Natureza

    Física

    Entre para guardar nos favoritos

    Um corpo de massa 0,2 kg atinge o fim de um plano horizontal com velocidade , de intensidade 6 m/s e na direção paralela ao plano. A partir desse ponto, inicia uma queda que o leva a outro plano horizontal, 5 m abaixo do primeiro.


    Imagem da questão de Física, Universidade Nove de Julho – UNINOVE 2015, Dinâmica


    Considerando que a aceleração da gravidade é 10 m/s2 e que a resistência ao ar é desprezível, a energia mecânica que o corpo terá quando atingir o plano inferior será, em J, igual a

    Escolha uma alternativa para a questão 7c8c8746-f6
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  • Ciências da Natureza

    Física

    Entre para guardar nos favoritos
    O calor específico do alumínio é igual a 0,2 cal/(g ⋅ ºC), enquanto o calor específico do ferro é igual a 0,1 cal/(g ⋅ ºC). Desprezando-se qualquer perda de energia, aquece-se de 20 ºC a 100 ºC um ferro de passar roupas atual (elétrico, de alumínio e de massa igual a 250 g) e um ferro de passar roupas antigo (a carvão, de ferro e de massa igual a 1500 g).

    A quantidade de energia utilizada para o aquecimento do ferro de passar roupas antigo em relação ao ferro de passar roupas atual é
    Escolha uma alternativa para a questão 7c901aaa-f6
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  • Ciências da Natureza

    Física

    Entre para guardar nos favoritos
    Ao sofrer uma expansão isobárica, uma amostra de gás ideal realiza trabalho sobre um projétil de 0,05 kg que, partindo do repouso, é lançado verticalmente para cima atingindo uma altura máxima de 40 m. Considerando que o volume da amostra era de 0,0003 m3 no início da expansão e de 0,0008 m3 no fim, dada a aceleração da gravidade de 10 m/s2 e desprezando perdas de energia, a pressão do gás durante a expansão, em Pa, era igual a
    Escolha uma alternativa para a questão 7c9329f1-f6
    Abrir questão de Física, prova de 2015
  • Ciências da Natureza

    Física

    Entre para guardar nos favoritos

    Duas paredes adjacentes e ortogonais de um elevador são totalmente revestidas por espelhos planos E1 e E2 . Ao adentrar o elevador, um passageiro P se posiciona equidistante às duas paredes.


    Imagem da questão de Física, Universidade Nove de Julho – UNINOVE 2015, Óptica Geométrica


    Levando-se em conta que a imagem de um espelho se torna objeto para o outro espelho e vice-versa, o número máximo de imagens, de si próprio, que o passageiro é capaz de visualizar quando olha para o conjunto de espelhos é igual a 

    Escolha uma alternativa para a questão 7c963b70-f6
    Abrir questão de Física, prova de 2015
  • Ciências da Natureza

    Física

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    A lâmpada de 40 W de uma luminária de emergência acende-se automaticamente quando ocorre uma interrupção do fornecimento de energia elétrica. Quando suas baterias estão completamente carregadas, a luminária tem autonomia de 5 horas. Enquanto a lâmpada está acesa, o circuito eletrônico ao qual ela está ligada dissipa 4000 J por hora.

    De acordo com as informações, a energia elétrica armazenada nas baterias, quando estão com carga máxima, é, em kJ, igual a
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  • Ciências da Natureza

    Biologia

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    Ironicamente, a solução para o aquecimento global pode estar em uma bactéria que adora calor, Pyrococcus furiosus, que vive dentro de vulcões submarinos em que a temperatura chega a 100 °C. Em uma experiência feita pela Universidade da Geórgia, nos EUA, esse microrganismo recebeu cinco genes de outra bactéria subaquática, a Metallosphaera sedula. Dessa combinação surgiu um organismo capaz de algo muito útil: alimentar-se de CO2.

    Disponível em: http://super.abril.com.br/ciencia/cientistascriam-bacteria-come-co2-ar-748325.shtml. Acesso em: 30 set. 2014.

    Sobre o texto acima, é correto afirmar que:
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