Questões de Concurso Comentadas para tecnologista - desenvolvimento de hardware-software
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I would1 look to generate in my friends, and across my generation, a commitment to serving. Whether in schools, hospitals, or on wilderness trails, I’d hope 2 to create in each of us a new, expanded sense of citizenship. We’d spend 3 a year of our lives, before jobs, children, and mortgages complicate our options, building an America where serving is not the obligation of a few – or a possibility only to the privileged.
It would be 4 a real choice for everyone. If I were 22 I’d want to give 5 myself an answer to the question: “Where did you serve?”
“The team believes the impact has left behind a 40m- wide crater.
‘That’s the estimation we have made according to current impact models. We expect that soon Nasa could observe the crater and confirm our prediction,’ said Prof Madiedo.
It would be one of many scars on the lunar surface. Unlike Earth, the Moon has no atmosphere to shield it from meteorite collisions, and its surface shows a record of every strike.”
This is how stars die
5,000 light years away in Centaurus, a large constellation in the southern sky, is the Boomerang Nebula, a cloud of gas being expelled from a dying star.
This cloud is one of _________ (bizarre) 1 and ___________ (mysterious) 2 objects in the universe. Here, within the gas streaming outwards, astronomers have found that the temperature drops ___________ (low) 3 nearly absolute zero.
It is, ___________ (far) 4 anyone knows, the coldest place in the universe.
It may also prove to be quite important. Because this ____________ (frigid) 5 place, and objects like it, albeit a tad ___________ (warm) 6– may help astronomers unravel a host of cosmic conundrums, from the violent yet spectacular deaths of stars and the formation of galaxies to cosmic explosions and the origin of life itself.
Death of stars, birth of life
In many respects the Boomerang Nebula is unremarkable. All stars have to die some day. When ___________ (small) 7 stars end, those about eight times _____________ (massive) 8 our own sun, they produce a similar display of gas and dust.
display of gas and dust.
The Boomerang Nebula, a strange and extremely frigid object 5,000 light years away, gradually gives up its secrets
Space is cold. Very cold. ______ 1 fact, empty space, far ______ 2 any star or other hot object, is about -270 degrees C.
While downright frigid – a temperature low enough to freeze hydrogen ______ 3 Earth – that's still about 2.7 degrees ______ 4 absolute zero, the lowest possible temperature. The source _______ 5 those couple ________ 6 degrees is primordial: the leftover glow _______ 7 the big bang that gave birth _______ 8 our universe.
The entire cosmos is bathed ________ 9 this radiation, called the cosmic microwave background. As a result, it's hard to avoid this bit of heat, meaning that _______ 10 most of the cosmos, -270 degrees is as cold as it gets.