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Questões: Universidade Regional do Cariri (URCA) — com gabarito

646 questões de Universidade Regional do Cariri (URCA), de 2012 a 2022. Cada uma tem página própria, com enunciado completo, alternativas e gabarito — e dá para responder na própria página.

  • 646 questões
  • 6 provas

Resultados: 646 questões

Página 14 de 33

  • Ciências da Natureza

    Química

    (URCA/2022.2) Uma importante reação química que efetivamente está relacionada com a transformação de óleos ou gorduras de origem vegetal ou animal é conhecida como reação de transesterificação. Devido a sua versatilidade essa reação é utilizada em muitos processos industriais, por exemplo, os processos de obtenção do tereftalato de polietileno (PET) para produção de garrafas de refrigerantes; obtenção de resinas alquídicas, usadas na composição das conhecidas tintas "a óleo"; e ainda na produção de biodiesel usado como combustível em veículos automotores. Marque a opção correta que, de forma geral, resume o processo da transesterificação:
    Escolha uma alternativa para a questão 3b30325c-c0
  • Ciências da Natureza

    Química

    (URCA/2022.2) Aproximadamente, quantos mililitros de H2SO4 0,5 molar são necessários para dissolver 0,5 g de carbonato de cobre (II)? Considere as massas molares (g/mol): H=1; C=12; O=16; S=32; Cu=63,5.
    Escolha uma alternativa para a questão 3b2e2a6a-c0
  • Ciências da Natureza

    Química

    (URCA/2022.2) O alumínio reage com o ácido sulfúrico para formar sulfato de alumínio e hidrogênio. Qual é o volume de gás hidrogênio em litros (L) produzido a 300 K e pressão de 1,0 atm, quando 5,4 g de alumínio e 50,0 mL de ácido sulfúrico 5,0 M são misturados para a reação? Considere: massa molar do alumínio = 27, 0g/mol; R = 0, 082atm.L.mol−1K−1.
    Escolha uma alternativa para a questão 3b2a3401-c0
  • Ciências da Natureza

    Química

    (URCA/2022.2) Uma solução aquosa incolor contém nitratos de dois metais, X e Y. Quando foi adicionada auma solução aquosa de N αCl, formou-se um precipitadobranco. Verificou-se que este precipitado era parcialmente solúvel em água quente para dar um resíduo P euma solução Q. O resíduo P era solúvel em NH3 aquosae em excesso de tiossulfato de sódio (N α2S2O3). A solução quente Q deu um precipitado amarelo com KI. Osmetais X e Y, respectivamente, são: 
    Escolha uma alternativa para a questão 3b2833c9-c0
  • Ciências da Natureza

    Química

    (URCA/2022.2) 10 g de hidrogênio e 142 g de cloro reagem entre si. A quantidade restante de gás reagente reage com o excesso de oxigênio. A mesma quantidade do gás reagente reage com nitrogênio. Calcule as quantidades dos produtos em ambas as reações. Considere as massas molares: H = 1g/mol e Cl = 35,5g/mol.
    Escolha uma alternativa para a questão 3b263f85-c0
  • Matemática

    Matemática

    (URCA/2022.2) Seja f a função f(x) = x² − 2 √2x + 2. A imagem de f é o conjunto
    Escolha uma alternativa para a questão 3b1e8987-c0
  • Matemática

    Matemática

    (URCA/2022.2) Considere os subconjuntos de números reais A = {x ∈ ℝ : x < −5 ou x > 2} e B = {x ∈ ℝ : −8 < x < 3}. O complementar de A ∪ B em relação ao conjunto universo ℝ é o conjunto 
    Escolha uma alternativa para a questão 3b0f012c-c0
  • Matemática

    Matemática

    (URCA/2022.2) Após um rigoroso processo seletivo, um grupo formado por 7 homens e 4 mulheres atingiu os requisitos exigidos por uma determinada empresa para fins de contratação. Porém a empresa irá contratar apenas 6 dos 11 candidatos aptos, sendo que, destes 6, pelo menos duas devem ser mulheres. De quantos modos a empresa pode escolher este grupo de 6 pessoas? 
    Escolha uma alternativa para a questão 3b0b2fd0-c0
  • Matemática

    Matemática

    (URCA/2022.2) Sejam x e y números reais que satisfazem as desigualdades −3 ≤ −x ≤ −2 e 1 ≤ y ≤ 5. É correto afirmar que
    Escolha uma alternativa para a questão 3b094929-c0
  • Ciências da Natureza

    Física

    (URCA/2022.2) Um bloco de gelo contendo uma esfera de aço em seu interior está totalmente imerso numa amostra de água líquida em um recipiente. Todo o sistema se encontra a 0°C sob pressão atmosférica normal. A água possui um comportamento anômalo entre 0°C e 4°C de modo que, em particular, o gelo fica mais denso ao derreter a 0° ao invés de se dilatar. Após o derretimento do gelo:
    Escolha uma alternativa para a questão 3afbe5ca-c0
  • Ciências da Natureza

    Física

    (URCA/2022.2) Marque a alternativa incorreta sobre a Luz. 
    Escolha uma alternativa para a questão 3af603b5-c0
  • Ciências da Natureza

    Física

    (URCA/2022.2) Marque a opção que está em desacordo com conceitos da gravitação universal (não relativística) e seus aspectos históricos:
    Escolha uma alternativa para a questão 3af41990-c0
  • Ciências da Natureza

    Física

    (URCA/2022.2) Um bloco desliza, com velocidade de 1m/s, num trecho X sobre uma mesa horizontal fixa no solo. A velocidade do bloco é reduzida uniformemente até atingir o valor zero. Podemos afirmar que o produto ax · ∆x de sua aceleração pelo deslocamento é dado por
    Escolha uma alternativa para a questão 3ae21f99-c0
  • Linguagens

    Inglês

    Texto 5 


    Coronavirus has swept through tribes, killing elders and inflicting irreparable damage on tribal history, culture and medicine


       When Bep Karoti Xikrin fell ill with Covid-19, he refused to go to a hospital. The 64-year-old chief of a Xikrin indigenous village in Brazil’s Amazon was plagued by headaches and fatigue and struggled for breath. But, according to his daughter Bekuoi Raquel, he was afraid that if he were admitted to hospital he might never return.


       Instead, he died in his village – and with him, was lost decades of knowledge and leadership. “He knew so much about things we haven’t even experienced,” said Bekuoi, 21. “Everyone admired him. He was very loved.”


       As Brazil’s confirmed overall death toll from Covid-19 passes 50,000, the virus is scything through the country’s indigenous communities, killing chiefs, elders and traditional healers – and raising fears that alongside the toll of human lives, the pandemic may inflict irreparable damage on tribal knowledge of history, culture and natural medicine.


       The Munduruku people alone have lost 10 sábios, or wise ones. “We always say they are living libraries,” said Alessandra Munduruku, a tribal leader. “It’s been very painful.”


       The victims include prominent figures such as Paulinho Paiakan, a Kayapó leader who fought alongside rock star Sting against the Belo Monte dam.


       The indigenous organisation Apib has logged at least 332 Covid-19 deaths, and 7,208 coronavirus cases across 110 communities. “We are facing extermination,” said its executive coordinator, Dinamam Tuxá.


       Indigenous leaders such as Tuxá say the government of the far-right president, Jair Bolsonaro, is failing to protect the country’s 900,000 indigenous people – many of whom live in small communities, where dozens often share the same house.


       Tuxá said Brazil’s Funai indigenous agency has taken too long to send emergency food kits to people isolating in their villages, forcing them to risk infection by traveling to nearby towns for emergency government payments. Funai said it had delivered 82,000 basic food kits and 43,000 hygiene kits.


       Some leaders even blame government health workers for bringing the virus. Katia Silene Akrãtikatêjê, 51, a chief from the Gavião tribe in Pará state, believes she caught Covid-19 after a government health team visited their village to give flu vaccines. “Everyone got sick from there on,” she said.

    From: shorturl.at/finAM. Accessed on 07/01/2020


    As críticas que o líder indígena Tuxá fez estão relacionadas ao fato de o governo federal:
    Escolha uma alternativa para a questão 41ce392d-6a
  • Linguagens

    Inglês

    Texto 4


    Coronavirus is 10 times deadlier than swine flu: WHO


       COVID-19, the disease caused by coronavirus, is officially 10 times deadlier than the H1N1 swine flu strain that ripped across much of the world in 2009, the World Health Organization (WHO) confirmed Monday.


       The only way to truly halt the spread is a vaccine, WHO chief Tedros Adhanom Ghebreyesus said in a briefing from Geneva. More than 1.8 million people have been infected so far worldwide, and at least 115,000 have died.


       “Evidence from several countries is giving us a clearer picture about this virus, how it behaves, how to stop it and how to treat it,” Tedros said. “We know that COVID-19 spreads fast, and we know that it is deadly – 10 times deadlier than the 2009 flu pandemic.”


       While swine flu, as it was popularly known, killed 18,500 people, the true toll may have been closer to between 151,700 and 575,400, Agence France Presse (AFP) reported, citing The Lancet.


       “We know that the virus can spread more easily in crowded environments like nursing homes,” Tedros continued. “We know that early case finding, testing, isolating, caring for every case, and tracing every contact is essential for stopping transmission.”


       Pointing out that in some countries cases are doubling every three to four days, the disease accelerates fast but “decelerates much more slowly,” Tedros said. “In other words, the way down is much slower than the way up,” he said. “That means control measures must be lifted slowly and with control.”


       Tedros cautioned that restarting the shutdown portions of the economy in the U.S. and other countries whose leaders have been anxious to loosen restrictions could prove deadly. He also exhorted everyone around the world to work together, as several development ministers from the United Kingdom, Denmark, Iceland, Finland, Germany, Norway and Sweden had done in a recent joint editorial.

    From: shorturl.at/fhjPR. Accessed on 04/14/2020

    Para o diretor da OMS, a solução mais eficaz para parar a propagação do corona vírus é:
    Escolha uma alternativa para a questão 41c08c55-6a
  • Linguagens

    Inglês

    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.

    Imagem da questão de Inglês, URCA 2021, Interpretação de texto | Reading comprehension


       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

    Dentre as razões para o pedido do Primeiro Ministro Britânico para que os cidadãos fiquem em casa está:
    Escolha uma alternativa para a questão 4189730a-6a
  • Linguagens

    Inglês

    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.

    Imagem da questão de Inglês, URCA 2021, Interpretação de texto | Reading comprehension


       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

    Sobre o isolamento social, o texto permite inferir que:
    Escolha uma alternativa para a questão 4183d402-6a
  • Linguagens

    Inglês

    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.

    Imagem da questão de Inglês, URCA 2021, Interpretação de texto | Reading comprehension


       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

    De acordo com o texto, é correto afirmar que Boris Johnson:
    Escolha uma alternativa para a questão 417d9d83-6a