Foram encontradas 96 questões.
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The practical impacts of climate change can be hard to predict because of the large scales of time and geography over which changes are occurring. But more frequent jolts in midair could be one way in which individuals will soon literally feel the effects.
A new scientific study says that severe turbulence could become two to three times more common later this century when there is twice as much carbon dioxide in the atmosphere.
‘Our new study paints the most detailed picture yet of how aircraft turbulence will respond to climate change,’ says author Dr. Paul Williams. ‘Even the most seasoned frequent fliers may be alarmed at the prospect of a 149% increase in severe turbulence, which frequently hospitalizes air travelers and flight attendants around the world.’
Climate change is expected to lead to stronger vertical wind shears in the jet stream, at the cruising altitude for most jet aircraft. Wind shears can become unstable and cause turbulence.
Williams used supercomputers simulations that calculate clear-air turbulence along Transatlantic routes in winter and found all turbulence strength levels will increase in a world with twice as much CO2. The computer models show the average amount of light turbulence will increase by 59%, light-to-moderate turbulence by 75%, moderate by 94%, moderate-to-severe by 127%, and severe by 149%.
Ironically, or perhaps poetically, aviation has long been recognized as a major contributor of greenhouse gases to the atmosphere.
Fonte:www.forbes.com
GLOSSARY
jolt – solavanco
seasoned – experiente
wind shear – tesoura de vento
According to the text,
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O vocábulo alistar segue o mesmo processo de formação de palavras presente em
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Uma onda propagando-se em um meio material passa a propagar-se em outro meio cuja velocidade de propagação é maior do que a do meio anterior. Nesse caso, a onda, no novo meio tem
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The birds and the bees
My little boy came in the other day with a really serious look on his face and said, ‘Dad, do you mind if I ask you a question? Where do I come from?’ I’d been dreading this question for ages, but like a good father, I sat him down and gently told him all about the birds and the bees. When I’d finished, he was very quite. He then got up and went, ‘thank you, Dad’ and headed for the door. I said, ‘So what made you ask me?’ and he turned around and said, ‘I just want to know, because Bobby next door says HE comes from Manchester!’
Fonte: Innovations/ Thompson
According to the text, we can infer that
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Considere a matriz !$ \begin{bmatrix} 1 & x-1 \\ 2x & 4x-1 \end{bmatrix} !$. Os termos !$ x-1 !$, !$ 2x !$, !$ 4x-1 !$, são, nessa ordem, termos consecutivos de uma progressão aritmética. Dessa forma, det(A) é igual a
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Leia as frases:
I. Gostava de doces caramelizados da doçaria de Dona Dalva.
II. No shopping, vigiava-a com a discrição de um investigador profissional.
III. Entre livros e cadernos velhos, na estante, encontrou um bilhete da antiga namorada.
IV. Lembrava-se ainda do período de sua infância vivida naquela cidadezinha do interior do Brasil.
Há objeto direto nas sentenças
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O valor de sen 1270° é igual a
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Assinale a alternativa que traz a correta sequência dos termos que preenchem as lacunas do poema abaixo, observando a regência dos verbos que os exigem.
Hão de chorar ____ ela os cinamomos;
Murchando as flores ao tombar do dia.
Dos laranjais hão de cair os pomos,
Lembrando-se ________ que ____ colhia.
[...]
Hão de chorar a irmã que ____ sorria.
[...]
A lua que lhe foi mãe carinhosa,
Que a viu nascer e amar, há de envolvê(ver) ____
Entre lírios e pétalas de rosa.
(Alphonsus de Guimaraens)
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A posição (x) de um móvel em função do tempo (t) é representado pela parábola no gráfico a seguir
Durante todo o movimento o móvel estava sob uma aceleração constante de módulo igual a 2 !$ m/s^2 !$. A posição inicial desse móvel, em m, era
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Inside Lilium, The World’s First Vertical Takeoff And Landing Private Jet
Wonder what’s in store for the future of private jet flying? Here’s a glimpse. A start-up company – hosted in a European Space Agency (ESA) business incubator center in Bavaria – released an idea for an egg-shaped two-seater plane called Lilium that’s currently in the works. With a top speed of 250 mph and a range of 300 miles, the plane can travel roughly between Munich and Berlin in about 90 minutes. And according to the ESA, if testing succeeds, this _____ the world’s first vertical takeoff and landing private jet.
The project came about when Daniel Wiegand – one of the four founders of Lilium – wanted to realize flying for the masses in a fast, inexpensive, efficient and eco-friendly way. ‘Our goal is to develop an aircraft that doesn’t need the complex and expensive infrastructure of an airport, can be used close to urban areas, and doesn’t produce too much noise and pollution,’ he said. So to produce this new class of airplanes that could take off and land vertically anywhere with a surface area of 250 square feet by 2018, Wiegand and his team in Germany came up with a design using electric engines and incorporated movable fan turbines.
Fonte: www.forbes.com
GLOSSARY
glimpse – uma ideia para entender melhor algo
Choose the best verbal form to have the text completed correctly:
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Cadernos
Caderno Container