Foram encontradas 120 questões.
Read the text and answer question.
Twenty-First Century Birdwatching
Our ancestors!$ ^{(B)} !$ could spot natural predators from far by their silhouettes. Are we equally aware of the predators!$ ^{(A)} !$ in the present-day? Drones are remote-controlled planes!$ ^{(D)} !$ that can be used for anything from surveillance, to rescue operations and scientific research. Most drones are used today by military powers for remote-controlled surveillance and attack, and their numbers are growing. The Federal Aviation Administration (FAA) predicted in 2012 that within 20 years there could be as many as 30.000 drones flying over U.S. Soil alone. As robotic birds!$ ^{(C)} !$ will become commonplace in the near future, we should be prepared to identify them.
(Adapted from https://medium.com/looking-up/21st-century-birdwatching)
In the text, all the nouns bellow refer to drones, except:
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Read the text to answer question.
The Pilot Fatigue Problem
For years, pilot fatigue has been a real issue. Airline pilots, as well as cargo, corporate and charter pilots can all face fatigue while on the job. While pilot fatigue can be common and overlooked, it poses a very troubling threat to aviation safety and should be taken seriously.
Pilot fatigue has been a real problem since the beginning of air travel. Charles Lindbergh fought to stay awake on his record-breaking 33.5-hour transatlantic flight from New York to Paris on the Spirit of St. Louis. Long-haul pilots have reported falling asleep at the controls. Cargo pilots that fly at night face fatigue from challenging the body's natural internal clock.
The Lindbergh flight provides a great example for the real issue today that fatigue is an acceptable risk and one that isn't given enough credit. Lindbergh flew from New York to Paris without falling asleep. Similarly, pilots today get away with flying tired all the time. If you ask an
average pilot how much sleep he got the night before a flight, it's probably on a par with the average American, which is about six and a half hours.
This might be an acceptable amount of sleep if you have a desk job.
(Source: www.thebalance.com/the-pilot-fatigue-problem)
“on a par with”, in bold type, means
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Sejam os números complexos !$ z_1 = 1 – i !$, !$ z_2 = 3 + 5i !$ e !$ z_3 = z_1 + z_2 !$. O módulo de !$ z_3 !$ é igual a
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As medidas, em cm, dos lados de um pentágono estão em Progressão Aritmética (PA). Se o perímetro desse polígono é 125 cm, o terceiro elemento da PA é
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O universo é um grande laboratório onde transformações estão ocorrendo a todo instante, como as explosões que permitem o surgimento (nascimento) e/ou a morte de estrelas e outros corpos celestes. Em uma noite de céu límpido, é possível observar a luz, proveniente de diferentes estrelas, muitas das quais possivelmente já não mais existem. Sabendo que as ondas eletromagnéticas correspondentes ao brilho destas estrelas percorrem o espaço interestelar com a velocidade máxima de 300.000 km/s, podemos afirmar que não ouvimos o barulho destas explosões porque:
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A superfície lateral de um cone, ao ser planificada, gera um setor circular cujo raio mede 10 cm e cujo comprimento do arco mede 10!$ \pi !$ cm. O raio da base do cone, em cm, mede
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Um balão de borracha preto foi preenchido com ar e exposto ao sol. Após certo tempo tende a se mover para cima se não estiver preso a algo. Uma possível explicação física para tal acontecimento seria:
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A metade da medida do ângulo interno de um octógono regular, em graus, é
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Read the text and answer question.
The New York’s Secret Life
In 2008, the photographer and film director Francesco Carrozzini bought a townhouse in Greenwich Village for $6.8 million. Ostensibly, he got a home built in 1844 with low ceilings and small dark rooms. But luxury real estate is never about the basics.
The house is part of the Macdougal-Sullivan Gardens Historic District a landmarked community of 21 row homes. Between them is a large interior courtyard shaded by maples, sycamores and palms. It’s a secret garden in the middle o f the city, hidden from the street. Each home comes with its own small backyard that borders on the larger common area shared by all.
Adapted from:http://www.nytimes.com
Choose the best alternative for the written form of “1844”.
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Read the cartoon and choose the best response.
http://www.kleefeldoncomics.com/2010/04/snoopys-got-bead-on-chuck.html
According to the cartoon,
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