Questões - ITA | Gabarito e resoluções

(ITA - 2002 - 1a Fase) A respeito de compostos contendo silcio, qual das opes abaixo apresenta a afirmao CORRETA?

(ITA - 2002 - 1a Fase) It is not every day you can walk down a Transylvanian village street under a barrage of stones, especially when the stones are being hurled by the woman who will be your wife. Anyone likely to run this risk should know that it helps to walk fast and wear a protective backpack, and console oneself with the thought it is possibly these little moments of shared tenderness and understanding (recalled, perhaps, by glowing firelight in later years), which make affection grow. A walk from Poland to Istanbul is a pretty odd ritual of courtship. We didnt wash our hair for six months, we talked all day, we shared some heroically disgusting meals, and ten years down the road, Kate and I have swapped our backpacks for livelier baggage - two boys, and a bump - and hung up our boots for the present. Metaphorically speaking, of course: in reality Kates boots got lost in the post and mine broke, so I threw them away. (...) Goodwin, J. On Foot to the Golden Horn (p.1). Considere as expresses abaixo, extradas do 2 pargrafo: I. pretty odd ritual of courtship remete ao tempo de namoro entre Kate e o narrador. II. ten years down the road refere-se caminhada entre a Polnia e Istambul. III. hang up our boots significa pendurar as chuteiras. est(o) condizente(s) com o texto:

(ITA - 2002 - 1a Fase) Seja :dado por. Se A tal que,ento:

(ITA - 2002 - 1a Fase) Considere uma reao qumica representada pela equao: Reagentes Produtos. A figura a seguir mostra esquematicamente como varia a energia potencial (Ep) deste sistema reagente em funo do avano da reao qumica. As letras a, b, c, d e e representam diferenas de energia. Com base nas informaes apresentadas na figura CORRETO afirmar que

(ITA - 2002 - 1a Fase) Um corpo de massa M, mostrado na figura, preso a um fio leve, inextensvel,que passa atravs de um orifcio central de uma mesa lisa. Considere que inicialmente o corpo se move ao longo de uma circunferncia, sem atrito. O fio, ento, puxado para baixo, aplicando-se uma fora F, constante, a sua extremidade livre.Podemos afirmar que:

(ITA - 2002 - 1a Fase) Considere as seguintes afirmaes relativas ao grfico apresentado a seguir: I. Se a ordenada representar a constante de equilbrio de uma reao qumica exotrmica e a abscissa, a temperatura, o grfico pode representar um trecho da curva relativa ao efeito da temperatura sobre a constante de equilbrio dessa reao. II. Se a ordenada representar a massa de um catalisador existente em um sistema reagente e a abscissa, o tempo, o grfico pode representar um trecho relativo variao da massa do catalisador em funo do tempo de uma reao. III. Se a ordenada representar a concentrao de um sal em soluo aquosa e a abscissa, a temperatura, o grfico pode representar um trecho da curva de solubilidade deste sal em gua. IV. Se a ordenada representar a presso de vapor de um equilbrio lquido gs e a abscissa, a temperatura, o grfico pode representar um trecho da curva de presso de vapor deste lquido. V. Se a ordenada representar a concentrao de NO2(g) existente dentro de um cilindro provido de um pisto mvel, sem atrito, onde se estabeleceu o equilbrio N2O4(g) 2 NO2(g), e a abscissa, a presso externa exercida sobre o pisto, o grfico pode representar um trecho da curva relativa variao da concentrao de NO2 em funo da presso externa exercida sobre o pisto, temperatura constante. Destas afirmaes, esto CORRETAS

(ITA - 2002 - 1a Fase) A diviso de um polinmio f(x) portem resto . Se os restos das divises de f(x) por e so, respectivamente, os nmeros a e b, ento vale:

(ITA - 2002 - 1a Fase) It is not every day you can walk down a Transylvanian village street under a barrage of stones, especially when the stones are being hurled by the woman who will be your wife. Anyone likely to run this risk should know that it helps to walk fast and wear a protective backpack, and console oneself with the thought it is possibly these little moments of shared tenderness and understanding (recalled, perhaps, by glowing firelight in later years), which make affection grow. A walk from Poland to Istanbul is a pretty odd ritual of courtship. We didnt wash our hair for six months, we talked all day, we shared some heroically disgusting meals, and ten years down the road, Kate and I have swapped our backpacks for livelier baggage - two boys, and a bump - and hung up our boots for the present. Metaphorically speaking, of course: in reality Kates boots got lost in the post and mine broke, so I threw them away. (...) Goodwin, J. On Foot to the Golden Horn (p.1). As funes gramaticais dos termos likely (linha 5); understanding (linha 10) e pretty (linha 14) so, respectivamente:

(ITA - 2002 - 1a Fase) Uma esfera metlica isolada, de 10,0 cm de raio, carregada no vcuo at atingir o potencial U=9,0V. Em seguida, ela posta em contato com outra esfera metlica isolada, de raio R2=5,0cm. Aps atingido o equilbrio, qual das alternativas a seguir melhor descreve a situao fsica? dado que (1/4) = 9,0 . 109 Nm2/C2.

(ITA - 2002 - 1 Fase) Para as mesmas condies de temperatura e presso, considere as seguintesafirmaes relativas condutividade eltrica de solues aquosas: I. A condutividade eltrica de uma soluo 0,1 mol/L de cido actico menor do que aquela docido actico glacial (cido actico praticamente puro). II. A condutividade eltrica de uma soluo 1 mol/L de cido actico menor do que aquela deuma soluo de cido tricloroactico com igual concentrao. III. A condutividade eltrica de uma soluo 1 mol/L de cloreto de amnio igual quela de umasoluo de hidrxido de amnio com igual concentrao. IV. A condutividade eltrica de uma soluo 1 mol/L de hidrxido de sdio igual quela deuma soluo de cloreto de sdio com igual concentrao. V. A condutividade eltrica de uma soluo saturada em iodeto de chumbo menor do queaquela do sal fundido. Destas afirmaes, esto ERRADAS

(ITA - 2002 - 1a Fase) Um dispositivo desloca, com velocidade constante, uma carga de 1,5C por um percurso de 20,0 cm atravs de um campo eltrico uniforme de intensidade 2,0 103 N/C. A fora eletromotriz do dispositivo

(ITA - 2002- 1a Fase) Give Us the Olympics, or Well Shoot By June Thomas Posted Tuesday, July 10, 2001, at 10:00 a.m. PT With the International Olympic Committee set to announce the 2008 Olympic Games venue on Friday, several newspapers editorialized about Beijings suitability. Canadas Globe and Mail admitted bias in favor of its hometown (Toronto and Paris are Beijings strongest rivals), but declared: Regardless of who the other contenders are, it would be wrong to award the Games to Beijing... It would reward an authoritarian regime that tramples on the most basic rights of the Chinese people. The Financial Times counseled the IOC members to ignore political factors when making their selection: Despite the ugliness of the Chinese regime, the world is willing to deal with it in political, institutional, cultural and economic terms. Why should the Olympic Games be something different? An op-ed in the Sydney Morning Herald argued that China doesnt deserve to host: There is no point in isolating China. It makes sense to trade with China and to facilitate its entry into the World Trade Organisation. But there is no reason to indulge the Beijing regime. The Heralds China correspondent offered a pragmatic argument: Giving the Games to Beijing will probably do nothing to advance human rights in China. The authorities will be keen to keep a lid on dissent before the Games. But not granting Beijing the Games is unlikely to help promote greater human rights in the short or long term... Passing over Beijing may lead to a hardening of Chinas attitudes in its relations with the West. It would certainly lead to a binge of nationalistic outrage with unforeseeable results. In a worst-case scenario it may encourage Chinas leadership to speed up its plans to forcibly reunify Taiwan with the motherland. An op-ed in Hong Kongs South China Morning Post struck a similar note of alarm: By stirring up the publics feelings to a frenzy over the Olympic bid, the Government plans to distract peoples attention from the problems of rampant corruption, a rising unemployment rate and a lack of confidence in the Communist Party. In the scenario that China loses the bid, the government-controlled media will direct the blame onto the United States and Western countries and once again incite anti-Western sentiments. With an almost paranoid mentality that the whole world is against them over their Olympic bid, the Chinese Government will be more militarily aggressive and refuse to co-operate with the west on such important issues as nuclear non-proliferation and regional peace. www.slate.com N.B. Op-ed: (Am E) the page opposite the EDITORIAL page in many American newspapers, which usually contains interesting feature articles on current subjects (LONGMAN DICTIONARY OF ENG. LANGUAGE AND CULTURE). Considere as afrmaes abaixo: I. us, no ttulo do texto, refere-se ao povo chins. II. O ttulo do texto pode ser entendido como um pedido da populao chinesa para o mundo ocidental. III. O ttulo do texto ilustra uma opinio jornalstica com relao ao governo chins no que diz respeito s Olimpadas de 2008. est(o) condizente(s) com o texto:

(ITA - 2002- 1a Fase) Give Us the Olympics, or Well Shoot By June Thomas Posted Tuesday, July 10, 2001, at 10:00 a.m. PT With the International Olympic Committee set to announce the 2008 Olympic Games venue on Friday, several newspapers editorialized about Beijings suitability. CanadasGlobe and Mail admitted bias in favor of its hometown (Toronto and Paris are Beijings strongest rivals), but declared: Regardless of who the other contenders are, it would be wrong to award the Games to Beijing... It would reward an authoritarian regime that tramples on the most basic rights of the Chinese people. TheFinancial Times counseled the IOC members to ignore political factors when making their selection: Despite the ugliness of the Chinese regime, the world is willing to deal with it in political, institutional, cultural and economic terms. Why should the Olympic Games be something different? An op-ed in theSydney Morning Heraldargued that China doesnt deserve to host: There is no point in isolating China. It makes sense to trade with China and to facilitate its entry into the World Trade Organisation. But there is no reason to indulge the Beijing regime. TheHeralds Chinacorrespondent offered a pragmatic argument: Giving the Games to Beijing will probably do nothing to advance human rights in China. The authorities will be keen to keep a lid on dissent before the Games. But not granting Beijing the Games is unlikely to help promote greater human rights in the short or long term... Passing over Beijing may lead to a hardening of Chinas attitudes in its relations with the West. It would certainly lead to a binge of nationalistic outrage with unforeseeable results. In a worst-case scenario it may encourage Chinas leadership to speed up its plans to forcibly reunify Taiwan with the motherland. An op-ed in Hong KongsSouth China Morning Poststruck a similar note of alarm: By stirring up the publics feelings to a frenzy over the Olympic bid, the Government plans to distract peoples attention from the problems of rampant corruption, a rising unemployment rate and a lack of confidence in the Communist Party. In the scenario that China loses the bid, the government-controlled media will direct the blame onto the United States and Western countries and once again incite anti-Western sentiments. With an almost paranoid mentality that the whole world is against them over their Olympic bid, the Chinese Government will be more militarily aggressive and refuse to co-operate with the west on such important issues as nuclear non-proliferation and regional peace. www.slate.com N.B. Op-ed: (Am E) the page opposite the EDITORIAL page in many American newspapers, which usually contains interesting feature articles on current subjects (LONGMAN DICTIONARY OF ENG. LANGUAGE AND CULTURE). Qual das afirmaes abaixo NO est de acordo com as snteses dos jornais?

(ITA - 2002 - 1a Fase) Dada a funo quadrtica temos que

(ITA - 2002 - 1a Fase) Sendo dado que 1 J = 0,239 cal, o valor que melhor expressa, em calorias, o calor produzido em 5 minutos de funcionamento de um ferro eltrico, ligado a uma fonte de 120 V e atravessado por uma corrente de 5,0 A,