Todas as questões do ENEM

Dois blocos, A e B, de massas iguais a 4 kg e 6 kg, respectivamente, têm adesivos presos em suas superfícies, de modo que, se houver uma colisão entre eles, os blocos passam a se mover unidos, como um único corpo. Considere uma colisão frontal entre os blocos, em que antes da colisão, o bloco A se mova para direita com velocidade de módulo 1 m/s e B se mova para esquerda, com velocidade de módulo 2 m/s, conforme a figura.

Desprezando todos os atritos, após a colisão os blocos se moverão

Durante uma apresentação, um atleta de 80 kg caminha sobre uma prancha de 6 m de comprimento e 40 kg de massa, apoiada sobre dois suportes, A e B. Em determinado instante, ele para e permanece em equilíbrio em uma das extremidades da prancha, como mostra a figura.

Sendo NA e NB as intensidades das forças verticais exercidas pelos apoios A e B sobre a prancha na situação de equlíbrio descrita, é correto afirmar que

Duas pequenas esferas, A e B, estão inicialmente paradas em alturas hA = 5 m e hB = 20 m, sobre uma mesma vertical, e serão lançadas horizontalmente para tocar o solo no ponto P, conforme mostra a figura.

No instante t = 0, a esfera B é lançada com velocidade vB = 1 m/s, enquanto a esfera A permanece em repouso. Considerando g = 10 m/s², desprezando a resistência do ar e sabendo que a esfera A será lançada com velocidade vA = 2 m/s, o intervalo de tempo entre os lançamentos das duas esferas para que toquem simultaneamente o ponto P deve ser igual a

Uma mola ideal tem uma de suas extremidades presa a uma parede vertical e a outra presa a um bloco. Tal bloco oscila em movimento harmônico simples entre as posições A e C, passando pelo ponto B, ponto médio do segmento , constituindo um sistema massa-mola.

Sobre esse movimento, é correto afirmar que:

Considere que, em determinado intervalo de tempo, um CD de 12 cm de diâmetro esteja em movimento circular e uniforme, girando a 180 rpm.

Adotando π = 3, é correto afirmar que, nesse intervalo de tempo,

(http://gocomics.com)

In the second panel, the word “would” indicates

No trecho do sexto parágrafo “hence the somewhat unusual moniker”, o termo em destaque equivale, em português, a

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

De acordo com o sexto parágrafo,

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

No trecho do quinto parágrafo “Instead, it has antennae to probe the depths”, o termo em destaque equivale, em português, a

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

No trecho do quinto parágrafo “ones that are not used extensively”, o termo em destaque refere-se a

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

No trecho do quarto parágrafo “a new species and genus was only realized”, o termo em destaque pode ser substituído, sem alteração de sentido, por

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

In the sentence of the third paragraph “despite being a central character”, the word in bold expresses the idea of

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

No trecho do terceiro parágrafo “The latter species part of its name”, o termo em destaque refere-se a

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

No trecho do segundo parágrafo “as well as the protagonist in J. K. Rowling’s novels”, a expressão em destaque veicula a ideia de

Leia o texto para responder à questão.

New crab species honors Harry Potter

     A recently discovered crab species has been somewhat tenuously named in honor of characters from the magical world of Harry Potter.

    The crab’s official name is Harryplax severus, with the genus Harryplax named after the crab’s collector, the late researcher and former marine Harry Conley, who died from a gunshot in 2002, as well as the protagonist in J. K. Rowling’s novels. Conley dug up many specimens in Guam’s coral reef rubble almost 20 years ago.

      The latter species part of its name is inspired by the character Severus Snape, who “despite being a central character in the series, keeps his background and agenda mysterious until the very end,” the statement announcing the naming said. The authors note this is “just like the present new species, which has eluded discovery until now, nearly 20 years after it was first collected”.

      Even though Conley found the specimen long ago, its status as a new species and genus was only realized recently by Dr Peter Ng and Dr Jose Cristopher E. Mendoza from the National University of Singapore.

     The crab is tiny, measuring just 7.9 by 5.6 millimeters (0.3 by 0.2 inches), and known only to herald from the island of Guam. It’s found deep in coral rubble or under subtidal rocks, and survives at dark depths with reduced eyes, ones that are not used extensively. Instead, it has antennae to probe the depths, and gets around on long thin legs.

     In the statement, Dr Mendoza was said to be a self-confessed “Potterhead”, hence the somewhat unusual moniker. But it’s not the first time Potter has inspired the naming of a new species – The magazine Popular Science notes that a dinosaur species was named after Hogwarts in 2006 (Dracorex hogwartsia), a wasp in Thailand was named Ampulex dementor in 2014, and a spider was named Eriovixia gryffindori last year.

(Jonathan O’Callaghan. www.iflscience.com, 24.01.17. Adaptado.)

De acordo com o texto, a nova espécie de caranguejo

Você já se deu conta de que nossa civilização é o culto à reminiscência? Nossas ruas e praças, nossas datas e agendas existem a serviço da evocação. Discutimos o valor político da memória ao questionar se determinada pessoa deve continuar sendo homenageada batizando uma via pública. O elevado Costa e Silva transformou-se em João Goulart, em São Paulo. Para os usuários comuns, nem o presidente e nem o general: apenas Minhocão... A metáfora da forma suplanta o debate político.

(Leandro Karnal. “Lembrar e esquecer ou a vida entre Dory e Funes”.

http://cultura.estadao.com.br)

O contexto político que envolve os personagens citados pelo autor do texto está associado

Eu presto atenção no que eles dizem mas eles não dizem nada. Fidel e Pinochet tiram sarro de você que não faz nada.

(Engenheiros do Hawaii. “Toda forma de poder”. https://letras.mus.br)

A letra da canção cita dois ex-presidentes de países latino- -americanos – Fidel Castro, de Cuba, e Augusto Pinochet, do Chile –, o que permite estabelecer um ponto comum entre eles, já que ambos

Quando as finanças da República foram recuperadas pela política deflacionista de Campos Sales, sobraram recursos para as obras há muito planejadas de saneamento e embelezamento da cidade. Tendo Paris como modelo, o centro da cidade foi depressa modificado, a avenida Beira-Mar foi aberta, jardins foram criados e reformados, os bondes ganharam tração elétrica, sem esquecer a construção do novo porto.

(José Murilo de Carvalho. Os bestializados, 1987. Adaptado.)

A reforma urbana descrita no trecho, empreendida no Rio de Janeiro,

No ano de 2015, uma série de protestos de estudantes fez com que a Universidade da Cidade do Cabo removesse de seu campus uma estátua em homenagem a Cecil Rhodes (1853-1902). Os protestos ocorreram porque Rhodes era uma das figuras mais representativas do neocolonialismo europeu dos séculos XIX e XX, que se caracterizou

Em 1852 um grande plantador de café, o senador Vergueiro, se decidiu a contratar diretamente trabalhadores na Europa. A ideia do senador era uma simples adaptação do sistema pelo qual se organizara a emigração inglesa para os EUA na época colonial: o imigrante vendia o seu trabalho futuro.

(Celso Furtado. Formação econômica do Brasil, 2004. Adaptado.)

A respeito do sistema de parceria abordado no texto, assinale a alternativa correta.