Magna Concursos

Foram encontradas 100 questões.

Alguns amigos apostam uma corrida num percurso em linha reta delimitado com 20 bandeirinhas igualmente espaçadas. A largada é na primeira bandeirinha e a chegada na última. O corredor que está na frente leva exatamente 13 segundos para passar pela 13ª bandeirinha. Se ele mantiver a mesma velocidade durante o restante do trajeto, o valor mais próximo do tempo em que ele correrá o percurso todo será de:
 

Provas

Questão presente nas seguintes provas
Uma urna possui 5 bolas azuis, 4 vermelhas, 4 amarelas e 2 verdes. Tirando-se simultaneamente 3 bolas, qual o valor mais próximo da probabilidade de que as 3 bolas sejam da mesma cor?
 

Provas

Questão presente nas seguintes provas
Determinado rio passa pelas cidades A, B e C. Se chove em A, o rio transborda. Se chove em B, o rio transborda e, se chove em C, o rio não transborda. Se o rio transbordou, pode-se afirmar que:
 

Provas

Questão presente nas seguintes provas
Na população brasileira verificou-se que a probabilidade de ocorrer determinada variação genética é de 1%. Ao se examinar ao acaso três pesssoas desta população, qual o valor mais próximo da probabilidade de exatamente uma pessoa examinada possuir esta variação genética?
 

Provas

Questão presente nas seguintes provas
Entre os itens que constituem as receitas da Agência Nacional de Águas, estão (está):
 

Provas

Questão presente nas seguintes provas
Entre as atribuições da Agência Nacional de Águas, estão (está):
 

Provas

Questão presente nas seguintes provas

Your answer to question must be based on the article below entitled “The accidental environmentalists”:

The accidental environmentalists
Source: www.economist.com
Dec, 11th 2008 (Adapted)

More destructive hurricanes, shrinking forests, melting glaciers, disappearing animals: the prospective damage to Latin America and the Caribbean from climate change makes for grim reading. A new World Bank report, timed to coincide with a United Nations conference in Poland, tries to put numbers to the potential economic cost. By taking the Intergovernmental Panel on Climate Change's predictions for what the planet might feel like in 2100 and then overlaying data from several thousand farms situated in regions of varying heat and dryness, it is possible to make some informed guesses about what the effect on crop yields, and therefore on GDP, would be if temperatures rose and rainfall fell.

Some Latin countries are already doing things to reduce net carbon emissions that put them ahead of governments elsewhere. Much of the region's power comes from hydroelectricity and biofuels. The result is that emissions of carbon dioxide per unit of power are 74% lower than in India and China.

There are obstacles to taking these policies further. In Brazil, plans for more hydroelectric dams in the Amazon are opposed by some environmentalists; they claim the resulting flooding of forest prompts methane-producing rotting vegetation.

In relation to the constructions of hydroelectric dams in the Amazon, some environmentalists
 

Provas

Questão presente nas seguintes provas

Looming water crisis simply a management problem
Source: www.newscientist.com
August 20th 2008 (Adapted)

Today's focus on the credit crisis and rising prices for food and oil has temporarily put another global scarcity in the shade: water. The UN predicts that by 2025, two-thirds of us will experience water shortages, with severe lack of water blighting the lives and livelihoods of 1.8 billion. According to the UN World Water Assessment Programme, by 2050, 7 billion people in 60 countries may have to cope with water scarcity. At this year's World Economic Forum, UN secretary-general Ban Ki-moon recommended that water scarcity should be at the top of the international agenda. “As the global economy grows, so will its thirst,” he said, warning of a future marred by conflicts over water.

There is no doubt that we need to rethink how we use water, especially with the human population growing rapidly, and global warming likely to produce unpredictable patterns of rainfall and drought. Nevertheless, my own research suggests that the situation may not be as dire as many are suggesting. Nations can thrive on surprisingly meagre quantities of fresh water – provided they adopt water-efficient technologies and encourage economic activity that does not guzzle water. I believe the looming water crisis is primarily a problem of distribution and management rather than supply. And we can solve it with existing technologies, increased investment and political will.

In paragraph 1, the author refers to "a future marred by conflicts over water". In other words, a future
 

Provas

Questão presente nas seguintes provas

Looming water crisis simply a management problem
Source: www.newscientist.com
August 20th 2008 (Adapted)

Today's focus on the credit crisis and rising prices for food and oil has temporarily put another global scarcity in the shade: water. The UN predicts that by 2025, two-thirds of us will experience water shortages, with severe lack of water blighting the lives and livelihoods of 1.8 billion. According to the UN World Water Assessment Programme, by 2050, 7 billion people in 60 countries may have to cope with water scarcity. At this year's World Economic Forum, UN secretary-general Ban Ki-moon recommended that water scarcity should be at the top of the international agenda. “As the global economy grows, so will its thirst,” he said, warning of a future marred by conflicts over water.

There is no doubt that we need to rethink how we use water, especially with the human population growing rapidly, and global warming likely to produce unpredictable patterns of rainfall and drought. Nevertheless, my own research suggests that the situation may not be as dire as many are suggesting. Nations can thrive on surprisingly meagre quantities of fresh water – provided they adopt water-efficient technologies and encourage economic activity that does not guzzle water. I believe the looming water crisis is primarily a problem of distribution and management rather than supply. And we can solve it with existing technologies, increased investment and political will.

According to paragraph 1, water shortages
 

Provas

Questão presente nas seguintes provas

Your answer to question must be based on the article below entitled “The accidental environmentalists”:

The accidental environmentalists
Source: www.economist.com
Dec, 11th 2008 (Adapted)

More destructive hurricanes, shrinking forests, melting glaciers, disappearing animals: the prospective damage to Latin America and the Caribbean from climate change makes for grim reading. A new World Bank report, timed to coincide with a United Nations conference in Poland, tries to put numbers to the potential economic cost. By taking the Intergovernmental Panel on Climate Change's predictions for what the planet might feel like in 2100 and then overlaying data from several thousand farms situated in regions of varying heat and dryness, it is possible to make some informed guesses about what the effect on crop yields, and therefore on GDP, would be if temperatures rose and rainfall fell.

Some Latin countries are already doing things to reduce net carbon emissions that put them ahead of governments elsewhere. Much of the region's power comes from hydroelectricity and biofuels. The result is that emissions of carbon dioxide per unit of power are 74% lower than in India and China.

There are obstacles to taking these policies further. In Brazil, plans for more hydroelectric dams in the Amazon are opposed by some environmentalists; they claim the resulting flooding of forest prompts methane-producing rotting vegetation.

As regards the potential economic cost caused by climate change, figures
 

Provas

Questão presente nas seguintes provas