Questões - ITA | Gabarito e resoluções

(ITA - 2004 - 1a Fase) Um painel coletor de energia solar para aquecimento residencial de gua, com50% de eficincia, tem superfcie coletora com rea til de 10 m . A gua circula em tubosfixados sob a superfcie coletora. Suponha que a intensidade da energia solar incidente de1,0 10 W/m e que a vazo de suprimento de gua aquecida de 6,0 litros por minuto.Assinale a opo que indica a variao da temperatura da gua.

(ITA - 2004 - 1a Fase) And Now, the Birdcast 1Passing almost unnoticed in the night, billions of birds will fly over the mid-Atlantic states this spring on their 4annual migration northward. A new5Web site will help ornithologists pinpoint 6critical habitat for the feathered 7travelers by combining weather radar 8data with old-fashioned fieldwork. 9Radar has been used to track bird10migrations since around 1940, says 11Steve Kelling, who heads BirdSource, a 12bird database at Cornell University. But the potential payoff grew about 5 years ago when the government began15installing Doppler radar Stations, which 16yield high-resolution three-dimensional 17data. Ornithologists are eager to use 18Doppler to track bird movement, but 19first, they need to calibrate it with data20from the ground. So Cornell, Clemson University, and other groups have launched BirdCast. Every few hours from 1 April to 31 May, radar images of the Philadelphia to25Washington, D. C., area some filtered to remove weather and reveal birds will be posted on the projects Web site (www.birdcast.org). The site will also collect observations30from several hundred citizen-scientists 31(birdwatchers, that is), which will be 32combined with other data, such as chirps 33picked up by acoustic monitors. Kelling 34says the results should reveal the birds35favorite rest stops, highlighting priority 36areas for protection. Eventually, 38BirdCast hopes to go nationwide. SCIENCE Vol 288 7 April 2000 ndices no canto superior esquerdo de uma palavra indica o nmero da linha do texto original. Cada uma das opes abaixo se refere a um termo extrado da notcia. Assinale a opo em que o termo no corresponde, respectivamente, ao significado e/ou funo gramatical explicitados.

(ITA - 2004 - 1a Fase) Considere as afirmaes dadas a seguir, em que A uma matriz quadrada n n, n 2: I. O determinante de A nulo se, e somente se, A possui uma linha ou uma coluna nula. II. Se A = (aij) tal que aij = 0 para i j, com i, j = 1,2,...,n, ento det A = a11a22...ann. III. Se B for obtida de A, multiplicando-se a primeira coluna por e a segunda por , mantendo-se inalteradas as demais colunas, ento det B = det A. Ento, podemos afirmar que (so) verdadeira(s)

(ITA - 2004) Na temperatura de 25C e presso igual a 1 atm, a concentrao de H2S numa soluo aquosa saturada de aproximadamente 0,1 moI L-1. Nesta soluo, so estabelecidos os equilbrios representados pelas seguintes equaes qumicas balanceadas: I. KI (25 C) = 9,1 x 10-8. II. KII (25 C) = 1,2 x 10-15. Assinale a informao ERRADA relativa a concentraes aproximadas (em moI L-1) das espcies presentes nesta soluo.

(ITA - 2004 - 1a Fase) Um recipiente cilndrico vertical fechado por meio de um pisto, com 8,00 kg de massa e 60,0cm2 de rea, que se move sem atrito. Um gs ideal, contido no cilindro, aquecido de 30C a 100C, fazendo o pisto subir 20,0 cm. Nesta posio, o pisto fixado, enquanto o gs resfriado at sua temperatura inicial. Considere que o pisto e o cilindro encontram-se expostos presso atmosfrica. Sendo Q1 o calor adicionado ao gs durante o processo de aquecimento e Q2, o calor retirado durante o resfriamento, assinale a opo correta que indica a diferena Q1 - Q2.

(ITA - 2004 - 1a Fase) Uma mistura de 300 mL de metano e 700 mL de cloro foi aquecida no interior de um cilindro provido de um pisto mvel sem atrito, resultando na formao de tetracloreto de carbono e cloreto de hidrognio. Considere todas as substncias no estado gasoso e temperatura constante durante a reao. Assinale a opo que apresenta os volumes CORRETOS, medidos nas mesmas condies de temperatura e presso, das substncias presentes no cilindro aps reao completa.

(ITA - 2004 - 1a Fase) Considere um cilindro circular reto, de volume igual a 360cm3, e uma pirmide regular cuja base hexagonal est inscrita na base do cilindro. Sabendo que a altura da pirmide o dobro da altura do cilindro. Sabendo que a altura da pirmide o dobro da altura do cilindro e que a rea da base da pirmide de 54cm2, ento a rea lateral da pirmide mede, em cm2,

(ITA -2004 - 1a Fase) A linha das neves eternas encontra-se a uma altura h0 acima do nvel do mar,onde a temperatura do ar 0C. Considere que, ao elevar-se acima do nvel do mar, o ar sofre uma expanso adiabtica queobedece relao p/p = (7/2) (T/T) , em que p a presso e T, a temperatura. Considerandoo ar um gs ideal de massa molecular igual a 30u (unidade de massa atmica) e a temperaturaao nvel do mar igual a 30C, assinale a opo que indica aproximadamente a altura h0 da linhadas neves.

(ITA - 2004 - 1a Fase) Commentary Human Development 1997; 40:96-101 A New Generation: New Intellectual Opportunities James Youniss The Catholic University of America, Washington, D.C., USA 1These comments on the publication of the new handbook are written from the perspective of a member of the in-between generation. In-betweeners were born about 5the time Murchison edited the first and second handbooks in the 1930s. They spent childhood watching newreels [sic] of World War II at movie houses featuring cowboy serials on Saturday afternoons. 10Their professional education straddled two psychological eras. It began just as the experimental psychology paradigm was ending its domination and it was completed as new alternatives were 15coming into view. (...) Had they been born just a few years earlier, they would have been part of that powerful and long-lasting generation that entered the military during World 20War II and filled the universities immediately after the war. This unusual cohort held leadership in the discipline of psychology in general and developmental psychology, in particular, 25for several decades. (...) ndices no canto superior esquerdo de uma palavra indicam o nmero da linha do texto original. Assinale a opo que no expressa uma idia contida no texto.

(ITA - 2004 - 1 Fase) Commentary Human Development 1997; 40:96-101 A New Generation: New Intellectual Opportunities James Youniss The Catholic University of America, Washington, D.C., USA 1These comments on the publication of the new handbook are written from the perspective of a member of the in-between generation. In-betweeners were born about 5the time Murchison edited the first and second handbooks in the 1930s. They spent childhood watching newreels [sic] of World War II at movie houses featuring cowboy serials on Saturday afternoons. 10Their professional education straddled two psychological eras. It began just as the experimental psychology paradigm was ending its domination and it was completed as new alternatives were 15coming into view. (...) Had they been born just a few years earlier, they would have been part of that powerful and long-lasting generation that entered the military during World 20War II and filled the universities immediately after the war. This unusual cohort held leadership in the discipline of psychology in general and developmental psychology, in particular, 25for several decades. (...) ndices no canto superior esquerdo de uma palavra indicam o nmero da linha do texto original. Assinale a opo que contm uma expresso equivalente a: Had they been born, em Had they been born just a few years earlier... (linhas 16 e 17) e que, portanto, poderia vir a substitu-la no texto.

(ITA - 2004 - 1a Fase) O conjunto de todos os valores de,, tais que as solues da equao (em x) so todas reais,

(ITA - 2004 - 1a Fase) Uma estrela mantm presos, por meio de sua atrao gravitacional, os planetas Alfa, Beta e Gama. Todos descrevem rbitas elpticas, em cujo foco comum se encontra a estrela, conforme a primeira Lei de Kepler. Sabe-se que o semieixo maior da rbita de Beta o dobro daquele da rbita de Gama. Sabe-se tambm que o perodo de Alfa vezes maior que o perodo de Beta. Nestas condies, pode-se afirmar que a razo entre o perodo de Alfa e o de Gama :

(ITA -2004 - 1a Fase) Considere as seguintes radiaes eletromagnticas: I. Radiao Gama. II. Radiao visvel. III. Radiao ultravioleta. IV. Radiao infravermelho. V. Radiao micro-ondas. Dentre estas radiaes eletromagnticas, aquelas que, via de regra, esto associadas atransies eletrnicas em molculas so

(ITA -2004 - 1a Fase) Considere os eletrodos representados pelas semiequaes qumicas seguintes e seus respectivos potenciais na escala do eletrodo de hidrognio (E0) e nas condies-padro: Assinale a opo que contm o valor correto do potencial-padro do eletrodo representado pela semi-equao

(ITA - 2004 - 1a Fase) Commentary Human Development 1997; 40:96-101 A New Generation: New Intellectual Opportunities James Youniss The Catholic University of America, Washington, D.C., USA 1These comments on the publication of the new handbook are written from the perspective of a member of the in-between generation. In-betweeners were born about 5the time Murchison edited the first and second handbooks in the 1930s. They spent childhood watching newreels [sic] of World War II at movie houses featuring cowboy serials on Saturday afternoons. 10Their professional education straddled two psychological eras. It began just as the experimental psychology paradigm was ending its domination and it was completed as new alternatives were 15coming into view. (...) Had they been born just a few years earlier, they would have been part of that powerful and long-lasting generation that entered the military during World 20War II and filled the universities immediately after the war. This unusual cohort held leadership in the discipline of psychology in general and developmental psychology, in particular, 25for several decades. (...) ndices no canto superior esquerdo de uma palavra indicam o nmero da linha do texto original. Assinale a opo que contm a melhor traduo de that powerful and long-lasting generation (linha 18).