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Use os filtros para chegar às questões que interessam. Cada resultado abre em uma página própria com enunciado, alternativas e gabarito.
Na imagem, o autor procura representar as diferentes
gerações de uma família associada a uma noção
consagrada pelas elites intelectuais da época, que
era a de
O mercado tende a gerir e regulamentar todas as atividades humanas. Até há pouco, certos campos — cultura, esporte, religião — ficavam fora do seu alcance. Agora, são absorvidos pela esfera do mercado. Os governos confiam cada vez mais nele (abandono dos setores de Estado, privatizações).
RAMONET, I. Guerras do século XXI: novos temores e novas ameaças. Petrópolis: Vozes, 2003.
No texto é apresentada uma lógica que constitui uma característica central do seguinte sistema socioeconômico:
Texto 2
Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.
Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.
Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.
The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.
From: shorturl.at/dKV23. Accessed on 03/27/2020
Os métodos empregados nas análises químicas são ferramentas importantes para se conhecer a composição dos diversos materiais presentes no meio ambiente. É comum, na análise de metais presentes em amostras ambientais, como água de rio ou de mar, a adição de um ácido mineral forte, normalmente o ácido nítrico (HNO3), com a finalidade de impedir a precipitação de compostos pouco solúveis desses metais ao longo do tempo.
Na ocorrência de precipitação, o resultado da análise pode ser subestimado, porque
O paclitaxel é um triterpeno poli-hidroxilado que foi originalmente isolado da casca de Taxus brevifolia, árvore de crescimento lento e em risco de extinção, mas agora é obtido por rota química semissintética. Esse fármaco é utilizado como agente quimioterápico no tratamento de tumores de ovário, mama e pulmão. Seu mecanismo de ação antitumoral envolve sua ligação à tubulina interferindo com a função dos microtúbulos.
KRETZER, I. F. Terapia antitumoral combinada de derivados do paclitaxel e etoposídeo associados à nanoemulsão lipídica rica em colesterol - LDE. Disponível em: www.teses.usp.br. Acesso em: 29 fev. 2012 (adaptado).
De acordo com a ação antitumoral descrita, que função celular é diretamente afetada pelo paclitaxel?
A figura mostra os diferentes procedimentos que devem ser adotados para evitar a proliferação do mosquito Aedes aegypti, transmissor do vírus da dengue, febre zika e chicungunha. Além dessas ações, é importante a adição de substâncias químicas para eliminar os focos da doença. Entre essas substâncias, o sal de cozinha (NaCl), adicionado em água parada que não seja de consumo, é bastante eficiente, na proporção a seguir:
Texto 2
Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.
Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.
Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.
The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.
From: shorturl.at/dKV23. Accessed on 03/27/2020
Para a instalação de um aparelho de ar-condicionado, é sugerido que ele seja colocado na parte superior da parede do cômodo, pois a maioria dos fluidos (líquidos e gases), quando aquecidos, sofrem expansão, tendo sua densidade diminuída e sofrendo um deslocamento ascendente. Por sua vez, quando são resfriados, tornam-se mais densos e sofrem um deslocamento descendente.
A sugestão apresentada no texto minimiza o consumo de energia, porque
Texto 2
Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.
Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.
Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.
The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.
From: shorturl.at/dKV23. Accessed on 03/27/2020
Um cosmonauta russo estava a bordo da estação espacial MIR quando um de seus rádios de comunicação quebrou. Ele constatou que dois capacitores do rádio de 3 μF e 7 μF ligados em série estavam queimados. Em função da disponibilidade, foi preciso substituir os capacitores defeituosos por um único capacitor que cumpria a mesma função.
Qual foi a capacitância, medida em μF, do capacitor utilizado pelo cosmonauta?
Texto 2
Boris Johnson should have taken his own medicine - The British prime minister tested positive for Covid-19 and went into isolation, but not before doing untold damage and setting a bad example.
Boris Johnson, the prime minister of Britain, on Friday announced that he had tested positive for the coronavirus. In a brief video released on Twitter, he shared the basics: Having developed “mild symptoms — that’s to say, a temperature and a persistent cough” — he underwent testing and received the bad news. He will now be “selfisolating” until the illness has run its course.
Looking mostly healthy, if typically disheveled, Mr. Johnson stressed that he would continue to “lead the national fightback” from his home via teleconferencing. He urged the British public to abide by the three-week lockdown put into place on Monday.
The more effectively people stick with social distancing, the faster the nation and its National Health Service (N.H.S.) will “bounce back,” he said, before closing with the plea, “Stay at home, protect the N.H.S and save lives.” It was a responsible, no- drama message. If only the prime minister had displayed such leadership sooner, he — and who knows how many others — might have been spared this illness.
From: shorturl.at/dKV23. Accessed on 03/27/2020
Texto 3
The lessons Italy has learned about its COVID-19 outbreak could help the rest of the world
Only carefully conducted epidemiological studies will bring to light exactly how and why COVID-19 took off in northern Italy with such speed. But in the midst of the emergency, experts say there are already lessons to be gleaned from Italy's fatal errors — and urgent messages for other parts of the world.
"The biggest mistake we made was to admit patients infected with COVID-19 into hospitals throughout the region," said Carlo Borghetti, the vice- premier of Lombardy, an economically crucial region with a population of 10 million.
"We should have immediately set up separate structures exclusively for people sick with coronavirus. I recommend the rest of the world do this, to not send COVID patients into health-care facilities that are still uninfected."
Already, Italian cities in other regions are doing this, as well as field hospitals in Milan and Bergamo, Lombardy, which are almost complete.
However, the virus was not only spread to "clean" — i.e. infection-free — hospitals by admitting positive patients. In early March, as the number of infected was doubling every few days, authorities allowed overwhelmed hospitals to transfer those who tested positive but weren't gravely ill into assistedliving facilities for the elderly.
"It was like throwing a lit match onto a haystack," said Borghetti, who spoke out against the directive at the time. "Some facilities refused to take in the positive patients. For those that did [take them in], it was devastating."
Along with the tragic misstep of putting infected people under the same roof as clusters of the most physically vulnerable, Borghetti and others point to a deeper structural factor that accelerated the outbreak in northern Italy: a highly centralized health-care system with large hospitals as its focus.
From: shorturl.at/cMRTW. Accesses on 04/09/2020
Read the text below.
Read the text below.
Taking the news into account, consider the following statements.
I - Jennifer Rocca, a high school librarian in Brookfield, Connecticut, was among several supporters who urged lawmakers to pass the legislation.
II - Jennifer Rocca’s digital literacy course, a requirement for freshmen, challenges students to evaluate the credibility of online sources so they can spot falsehoods and biased information. She requires students to cite their sources when conducting research and explain why each would have the authority to be credible.
III - The Lawmakers have pushed schools to incorporate media literacy — including the ability to evaluate and analyze sources of information.
IV - Studies show many children spend hours every day online but struggle to comprehend the content that comes at them.
It is correct what is stated on:
