Foram encontradas 100 questões.
Um bloco de gelo com 725 g de massa é colocado num calorímetro contendo 2,50 kg de água a uma temperatura de 5,0°C, verificando-se um aumento de 64 g na massa desse bloco, uma vez alcançado o equilíbrio térmico. Considere o calor específico da água (c = 1,0 cal/g°C) o dobro do calor específico do gelo, e o calor latente de fusão do gelo de 80 cal/g. Desconsiderando a capacidade térmica do calorímetro e a
troca de calor com o exterior, assinale a temperatura inicial do gelo.
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Questão presente nas seguintes provas
A questão refere-se ao texto abaixo:
DREAM ON, AMERICA
THE U.S. MODEL: For years, much of the world did aspire to the American way of life. But today countries are finding more appealing systems in their own backyards.
BY ANDREW MORAVCSIK
NOT LONG AGO, THE AMERICAN DREAM WAS a global fantasy. Not only Americans saw themselves as a beacon unto nations. So did much of the world.
(...)
You had only to listen to George W. Bush's Inaugural Address last week (invoking "freedom" and "liberty" 49 times) to appreciate just how deeply Americans still believe in this founding myth. For many in the world, the president's rhetoric confirmed their worst fears of an imperial America relentlessly pursuing its narrow national interests. But the greater danger may be a delusional America – one that believes, despite all evidence to the contrary, that the American Dream lives on, that America remains a model for the world, one whose mission is to spread the word.
The gulf between how Americans view themselves and how the world views them was summed up in a poll last week by the BBC. Fully 71 percent of Americans see the United States as a source of good in the world. More than half view Bush's election as positive for global security. Other studies report that 70 percent have faith in their domestic institutions and nearly 80 percent believe "American ideas and customs" should spread globally.
FOREIGNERS TAKE AN ENTIRELY different view: 58 percent in the BBC poll see Bush's reelection as a threat to world peace. Among America's traditional allies, the figure is strikingly higher: 77 percent in Germany, 64 percent in Britain and 82 percent in Turkey. Among the 1.3 billion members of the Islamic world, public support for the United States is measured in single digits. Only Poland, the Philippines and India viewed Bush's second Inaugural positively.
Tellingly, the anti-Bushism of the president's first term is giving way to a more general anti- Americanism. A plurality of voters (the average is 70 percent) in each of the 21 countries surveyed by the BBC oppose sending any troops to Iraq, including those in most of the countries that have done so. Only one third, disproportionately in the poorest and most dictatorial countries, would like to see American values spread in their country. Says Doug Miller of GlobeScan, which conducted the BBC report: "President Bush has further isolated America from the world. Unless the administration changes its approach, it will continue to erode America's good name, and hence its ability to effectively influence world affairs."
(...)
The truth is that Americans are living in a dream world. Not only do others not share America's selfregard, they no longer aspire to emulate the country's social and economic achievements. The loss of faith in the American Dream goes beyond this swaggering administration and its war in Iraq. A President Kerry ......(.1.6.)....s..imilar disaffection, for it grows from the success of something America holds dear: the spread of democracy, free markets and international institutions – globalization, in a word.
Countries today have dozens of political, economic and social models to choose from. Anti- Americanism is especially virulent in Europe and
Latin America, where countries have established their own distinctive ways - none made in America. Futurologist Jeremy Rifkin, in his recent book "The European Dream", hails an emerging European Union based on generous social welfare, cultural diversity and respect for international law – a model that's caught on quickly across the former nations of Eastern Europe and the Baltics. In Asia, the rise of autocratic capitalism in China or Singapore is as much a "model" for development as America's scandal-ridden corporate culture.
(...)
Many are tempted to write off the new anti- Americanism as a temporary perturbation, or mere resentment. Blinded by its own myth, America has grown incapable of recognizing its flaws. For there is much about the American Dream to fault. If the rest of the world has lost faith in the American model – political, economic, diplomatic – it's partly for the very good reason that it doesn't work as well anymore.
MORAVCSIK teaches politics and directs the European Union Program at Princeton University.
Newsweek, January 31, 2005, Páginas 17-19
Na menção a Kerry destacado no texto, candidato derrotado nas últimas eleições presidenciais nos Estados Unidos, há omissão do verbo. Assinale a forma verbal que preenche corretamente aquela lacuna.
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Questão presente nas seguintes provas
Para iluminar o interior de um armário, liga-se uma pilha seca de 1,5 V a uma lâmpada de 3,0 W e 1,0 V. A pilha ficará a uma distância de 2,0 m da lâmpada e será ligada a um fio de 1,5 mm de diâmetro e resistividade de !$ 1,7 × 10^{-8}Ω . m !$. A corrente medida produzida pela pilha em curto circuito foi de 20 A. Assinale a potência real dissipada pela lâmpada, nessa montagem.
Provas
Questão presente nas seguintes provas
À borda de um precipício de um certo planeta, no qual se pode desprezar a resistência do ar, um astronauta mede o tempo !$ t_1 !$ que uma pedra leva para atingir o solo, após deixada cair de uma de altura H. A seguir, ele mede o tempo !$ t_2 !$ que uma pedra também leva para atingir o solo, após ser lançada para cima até uma altura h, como mostra a figura. Assinale a expressão que dá a altura H.
Provas
Questão presente nas seguintes provas
Um recipiente fechado, mantido a volume e temperatura constantes, contém a espécie química X no estado gasoso a pressão inicial !$ P_o !$. Esta espécie decompõe-se em Y e Z de acordo com a seguinte equação química: !$ X(g) \rightarrow 2Y(g) + 1/2 Z(g) !$. Admita que X, Y e Z tenham comportamento de gases ideais. Assinale a opção que apresenta a expressão CORRETA da pressão (P) no interior do recipiente em função do andamento da reação, em termos da fração !$ \alpha !$ de moléculas de X que reagiram.
Provas
Questão presente nas seguintes provas
Considere um calorímetro adiabático e isotérmico, em que a temperatura é mantida rigorosamente constante e igual a 40°C. No interior deste calorímetro é posicionado um frasco de reação cujas paredes permitem a completa e imediata troca de calor. O frasco de reação contém 100 g de água pura a 40°C. Realizam-se cinco experimentos, adicionando uma massa !$ m_1 !$ de um sal X ao frasco de reação. Após o estabelecimento do equilíbrio termodinâmico, adiciona-se ao mesmo frasco uma massa !$ m^2 !$ de um sal Y e mede-se a variação de entalpia de dissolução !$ (ΔH) !$. Utilizando estas informações e as curvas de solubilidade apresentadas na figura, excluindo quaisquer condições de metaestabilidade, assinale a opção que apresenta a correlação CORRETA entre as condições em que cada experimento foi realizado e o respectivo !$ ΔH !$.
Provas
Questão presente nas seguintes provas
A questão refere-se ao texto abaixo:
DREAM ON, AMERICA
THE U.S. MODEL: For years, much of the world did aspire to the American way of life. But today countries are finding more appealing systems in their own backyards.
BY ANDREW MORAVCSIK
NOT LONG AGO, THE AMERICAN DREAM WAS a global fantasy. Not only Americans saw themselves as a beacon unto nations. So did much of the world.
(...)
You had only to listen to George W. Bush's Inaugural Address last week (invoking "freedom" and "liberty" 49 times) to appreciate just how deeply Americans still believe in this founding myth. For many in the world, the president's rhetoric confirmed their worst fears of an imperial America relentlessly pursuing its narrow national interests. But the greater danger may be a delusional America – one that believes, despite all evidence to the contrary, that the American Dream lives on, that America remains a model for the world, one whose mission is to spread the word.
The gulf between how Americans view themselves and how the world views them was summed up in a poll last week by the BBC. Fully 71 percent of Americans see the United States as a source of good in the world. More than half view Bush's election as positive for global security. Other studies report that 70 percent have faith in their domestic institutions and nearly 80 percent believe "American ideas and customs" should spread globally.
FOREIGNERS TAKE AN ENTIRELY different view: 58 percent in the BBC poll see Bush's reelection as a threat to world peace. Among America's traditional allies, the figure is strikingly higher: 77 percent in Germany, 64 percent in Britain and 82 percent in Turkey. Among the 1.3 billion members of the Islamic world, public support for the United States is measured in single digits. Only Poland, the Philippines and India viewed Bush's second Inaugural positively.
Tellingly, the anti-Bushism of the president's first term is giving way to a more general anti- Americanism. A plurality of voters (the average is 70 percent) in each of the 21 countries surveyed by the BBC oppose sending any troops to Iraq, including those in most of the countries that have done so. Only one third, disproportionately in the poorest and most dictatorial countries, would like to see American values spread in their country. Says Doug Miller of GlobeScan, which conducted the BBC report: "President Bush has further isolated America from the world. Unless the administration changes its approach, it will continue to erode America's good name, and hence its ability to effectively influence world affairs."
(...)
The truth is that Americans are living in a dream world. Not only do others not share America's selfregard, they no longer aspire to emulate the country's social and economic achievements. The loss of faith in the American Dream goes beyond this swaggering administration and its war in Iraq. A President Kerry ......(.1.6.)....s..imilar disaffection, for it grows from the success of something America holds dear: the spread of democracy, free markets and international institutions – globalization, in a word.
Countries today have dozens of political, economic and social models to choose from. Anti- Americanism is especially virulent in Europe and
Latin America, where countries have established their own distinctive ways - none made in America. Futurologist Jeremy Rifkin, in his recent book "The European Dream", hails an emerging European Union based on generous social welfare, cultural diversity and respect for international law – a model that's caught on quickly across the former nations of Eastern Europe and the Baltics. In Asia, the rise of autocratic capitalism in China or Singapore is as much a "model" for development as America's scandal-ridden corporate culture.
(...)
Many are tempted to write off the new anti- Americanism as a temporary perturbation, or mere resentment. Blinded by its own myth, America has grown incapable of recognizing its flaws. For there is much about the American Dream to fault. If the rest of the world has lost faith in the American model – political, economic, diplomatic – it's partly for the very good reason that it doesn't work as well anymore.
MORAVCSIK teaches politics and directs the European Union Program at Princeton University.
Newsweek, January 31, 2005, Páginas 17-19
No texto, lê-se: Not only do others not share America's self-regard, they no longer aspire to emulate the country's social and economic achievements. Essa opinião do autor se fundamenta
Provas
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Leia a tira abaixo e responda a questão.
Comics-Sunday September 15, 2002
I knew things were going too smoothIy to Iast! é semelhante em português ao ditado:
Provas
Questão presente nas seguintes provas
São dadas as semi-equações químicas seguintes e seus respectivos potenciais elétricos na escala do eletrodo de hidrogênio nas condições-padrão:
I. !$ Cl_2(g)+2e^– \rightleftarrows 2Cl^–(aq) !$ ; !$ E^0_I = +1,358V !$
II. !$ Fe^{2+}(aq) + 2e^– \rightleftarrows Fe(s) !$ ; !$ E^0_{II} = –0,447V !$
III.!$ Fe^{3+}(aq) + 3e^– \rightleftarrows Fe(s) !$ ; !$ E^0_{III} = –0,037V !$
IV.!$ Fe^{3+}(aq) + e^– \rightleftarrows Fe^{2+} (aq) !$ ; !$ E^0_{IV} = +0,771V !$
V. !$ O_2(g)+4H^+(aq)+4e^– \rightleftarrows 2H_2O(l) !$ ; !$ E^0_V = + 1,229V !$
Com base nestas informações, assinale a opção que contém a afirmação CORRETA, considerando as condições- padrão.
Provas
Questão presente nas seguintes provas
Assinale a opção que apresenta a substância que pode exibir comportamento de cristal líquido, nas condições ambientes.
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Questão presente nas seguintes provas
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