Banco de questões
Use os filtros para chegar às questões que interessam. Cada resultado abre em uma página própria com enunciado, alternativas e gabarito.
Dados os polinômios F(x) e Q(x), ao dividir F(x) por Q(x) encontra-se como resto o polinômio R(x) = x3 − x2 + ax − 9. Sabe-se que F(x) e Q(x) são divisíveis pelo binômio x − 1.
O conjunto que contém todas as raízes do polinômio R(x) é
Life
Linus Pauling was born in Portland, Oregon, in the United States. His family came from a line of Prussian farmers, and his father worked as a pharmaceuticals salesman, among other things. After first studying at Oregon State University in Corvallis, Oregon, Linus Pauling earned his PhD from the California Institute of Technology in Pasadena, with which he maintained ties for the rest of his career. In the 1950s, Linus Pauling’s involvement in the anti-nuclear movement led to his being labeled a suspected communist, which resulted in his passport being revoked at times. Linus and Ava Helen Pauling had four children together.
Work
1954 Prize: The development of quantum mechanics during the 1920s had a great impact not only on the field of physics, but also on chemistry. During the 1930s Linus Pauling was among the pioneers who used quantum mechanics to understand and describe chemical bonding – that is, the way atoms join together to form molecules. Linus Pauling worked in a broad range of areas within chemistry. For example, he worked on the structures of biologically important chemical compounds. In 1951 he published the structure of the alpha helix, which is an important basic component of many proteins.
1962 Prize: The atom bombs dropped on Hiroshima and Nagasaki were a turning point in Linus Pauling’s life. Together with other scientists he spoke and wrote against the nuclear arms race, and he was a driving force in the Pugwash movement. It sought to reduce the role of nuclear arms in international politics and was awarded the Peace Prize in 1995. In 1959, Linus Pauling drafted the famous “Hiroshima Appeal”, the concluding document issued after the Fifth World Conference against Atomic and Hydrogen Bombs. He was one of the prime movers who urged the nuclear powers the USA, the Soviet Union and Great Britain to conclude a nuclear test ban treaty, which entered into force on 10 October 1963. On the same day, the Norwegian Nobel Committee announced that Linus Pauling had been awarded the Peace Prize that had been held over from 1962.
(Adaptado de: Linus Pauling - Facts. In: Nobelprize.org. (web) Nobel Media AB 2014.Disponível em:<http://www.nobelprize.org/nobel_prizes/peace/laureates/1962/ pauling-facts.html.> . Acesso em: 2 jul. 2017.)
Sobre a vida de Linus Pauling, considere as afirmativas a seguir.
I. Manteve vínculo com o Instituto de Tecnologia da Califórnia onde defendeu sua tese de doutorado.
II. Graduou-se no Instituto de Tecnologia da Califórnia onde conheceu sua futura companheira, Ava Helen Pauling.
III. Foi deportado para a Prússia onde trabalhou na indústria farmacêutica com seu pai até a devolução de seu passaporte.
IV. Envolveu-se com o movimento contra os armamentos nucleares pelo qual foi taxado de comunista.
Assinale a alternativa correta.
Segundo os paleontólogos, Lucy tinha 1,10 m de altura e 30 kg de massa corporal, sendo possível calcular seu Índice de Massa Corporal (IMC). Considere a classificação a seguir:
Sabendo que IMC = 
e com base na tabela, a classificação de Lucy é:
Sejam r a reta de equação y = mx+b, A e B os pontosem que essa reta intersecta as retas s1 : y = 3x e s2 : y = −x/5, respectivamente. O ponto M = (3, 1) é o ponto médio do segmento 
As coordenadas do ponto em que a reta r intersectao eixo das ordenadas é
Fill in the parentheses with T (True) or F (False) ( ) The burglar had a lot of trouble riding the bike.
( ) After having fallen off the bike, the burglar gave up trying to steal it.
( ) It was pretty easy for Mr. Green to draw a picture of the burglar.
( ) It took the police no more than thirty minutes to find the burglar.
According to the text, the correct sequence, from top to bottom,
is
Life
Linus Pauling was born in Portland, Oregon, in the United States. His family came from a line of Prussian farmers, and his father worked as a pharmaceuticals salesman, among other things. After first studying at Oregon State University in Corvallis, Oregon, Linus Pauling earned his PhD from the California Institute of Technology in Pasadena, with which he maintained ties for the rest of his career. In the 1950s, Linus Pauling’s involvement in the anti-nuclear movement led to his being labeled a suspected communist, which resulted in his passport being revoked at times. Linus and Ava Helen Pauling had four children together.
Work
1954 Prize: The development of quantum mechanics during the 1920s had a great impact not only on the field of physics, but also on chemistry. During the 1930s Linus Pauling was among the pioneers who used quantum mechanics to understand and describe chemical bonding – that is, the way atoms join together to form molecules. Linus Pauling worked in a broad range of areas within chemistry. For example, he worked on the structures of biologically important chemical compounds. In 1951 he published the structure of the alpha helix, which is an important basic component of many proteins.
1962 Prize: The atom bombs dropped on Hiroshima and Nagasaki were a turning point in Linus Pauling’s life. Together with other scientists he spoke and wrote against the nuclear arms race, and he was a driving force in the Pugwash movement. It sought to reduce the role of nuclear arms in international politics and was awarded the Peace Prize in 1995. In 1959, Linus Pauling drafted the famous “Hiroshima Appeal”, the concluding document issued after the Fifth World Conference against Atomic and Hydrogen Bombs. He was one of the prime movers who urged the nuclear powers the USA, the Soviet Union and Great Britain to conclude a nuclear test ban treaty, which entered into force on 10 October 1963. On the same day, the Norwegian Nobel Committee announced that Linus Pauling had been awarded the Peace Prize that had been held over from 1962.
(Adaptado de: Linus Pauling - Facts. In: Nobelprize.org. (web) Nobel Media AB 2014.Disponível em:<http://www.nobelprize.org/nobel_prizes/peace/laureates/1962/ pauling-facts.html.> . Acesso em: 2 jul. 2017.)
Nuvens de hidrogênio em nossa galáxia, emitindo radiação eletromagnética na faixa de comprimento de onda de 21cm, são observadas através de radiotelescópios. A energia de ionização do átomo de hidrogênio é 13,6 eV. A partir dessas informações pode-se concluir, EXCETO, que
Life
Linus Pauling was born in Portland, Oregon, in the United States. His family came from a line of Prussian farmers, and his father worked as a pharmaceuticals salesman, among other things. After first studying at Oregon State University in Corvallis, Oregon, Linus Pauling earned his PhD from the California Institute of Technology in Pasadena, with which he maintained ties for the rest of his career. In the 1950s, Linus Pauling’s involvement in the anti-nuclear movement led to his being labeled a suspected communist, which resulted in his passport being revoked at times. Linus and Ava Helen Pauling had four children together.
Work
1954 Prize: The development of quantum mechanics during the 1920s had a great impact not only on the field of physics, but also on chemistry. During the 1930s Linus Pauling was among the pioneers who used quantum mechanics to understand and describe chemical bonding – that is, the way atoms join together to form molecules. Linus Pauling worked in a broad range of areas within chemistry. For example, he worked on the structures of biologically important chemical compounds. In 1951 he published the structure of the alpha helix, which is an important basic component of many proteins.
1962 Prize: The atom bombs dropped on Hiroshima and Nagasaki were a turning point in Linus Pauling’s life. Together with other scientists he spoke and wrote against the nuclear arms race, and he was a driving force in the Pugwash movement. It sought to reduce the role of nuclear arms in international politics and was awarded the Peace Prize in 1995. In 1959, Linus Pauling drafted the famous “Hiroshima Appeal”, the concluding document issued after the Fifth World Conference against Atomic and Hydrogen Bombs. He was one of the prime movers who urged the nuclear powers the USA, the Soviet Union and Great Britain to conclude a nuclear test ban treaty, which entered into force on 10 October 1963. On the same day, the Norwegian Nobel Committee announced that Linus Pauling had been awarded the Peace Prize that had been held over from 1962.
(Adaptado de: Linus Pauling - Facts. In: Nobelprize.org. (web) Nobel Media AB 2014.Disponível em:<http://www.nobelprize.org/nobel_prizes/peace/laureates/1962/ pauling-facts.html.> . Acesso em: 2 jul. 2017.)
Life
Linus Pauling was born in Portland, Oregon, in the United States. His family came from a line of Prussian farmers, and his father worked as a pharmaceuticals salesman, among other things. After first studying at Oregon State University in Corvallis, Oregon, Linus Pauling earned his PhD from the California Institute of Technology in Pasadena, with which he maintained ties for the rest of his career. In the 1950s, Linus Pauling’s involvement in the anti-nuclear movement led to his being labeled a suspected communist, which resulted in his passport being revoked at times. Linus and Ava Helen Pauling had four children together.
Work
1954 Prize: The development of quantum mechanics during the 1920s had a great impact not only on the field of physics, but also on chemistry. During the 1930s Linus Pauling was among the pioneers who used quantum mechanics to understand and describe chemical bonding – that is, the way atoms join together to form molecules. Linus Pauling worked in a broad range of areas within chemistry. For example, he worked on the structures of biologically important chemical compounds. In 1951 he published the structure of the alpha helix, which is an important basic component of many proteins.
1962 Prize: The atom bombs dropped on Hiroshima and Nagasaki were a turning point in Linus Pauling’s life. Together with other scientists he spoke and wrote against the nuclear arms race, and he was a driving force in the Pugwash movement. It sought to reduce the role of nuclear arms in international politics and was awarded the Peace Prize in 1995. In 1959, Linus Pauling drafted the famous “Hiroshima Appeal”, the concluding document issued after the Fifth World Conference against Atomic and Hydrogen Bombs. He was one of the prime movers who urged the nuclear powers the USA, the Soviet Union and Great Britain to conclude a nuclear test ban treaty, which entered into force on 10 October 1963. On the same day, the Norwegian Nobel Committee announced that Linus Pauling had been awarded the Peace Prize that had been held over from 1962.
(Adaptado de: Linus Pauling - Facts. In: Nobelprize.org. (web) Nobel Media AB 2014.Disponível em:<http://www.nobelprize.org/nobel_prizes/peace/laureates/1962/ pauling-facts.html.> . Acesso em: 2 jul. 2017.)
Com base nos termos sublinhados no texto, considere as afirmativas a seguir.
I. O emprego da expressão “into force” enfatiza o caráter arbitrário do tratado assinado em 1963.
II. O uso da expressão “turning point” ressalta a importância que os acontecimentos de Hiroshima e Nagasaki tiveram sobre Linus Pauling.
III. Os termos “not only” e “but also” estão interligados e adicionam ênfase à informação sobre as aplicações da mecânica quântica também na Química.
IV. A expressão “that is” introduz uma explicação e poderia ser substituída, sem alteração de sentido por “in other words”.
Assinale a alternativa correta.
A Terra é constantemente atingida por um fluxo rarefeito de plasma quente (gás de elétrons e cátions) provenientes do vento solar. Ao atingirem a Terra, as partículas são capturadas pelo seu campo magnético e descrevem trajetórias espiraladas nesse campo. É correto afirmar sobre esse fenômeno que as partículas do vento solar
