Questões - AFA 2009 | Gabarito e resoluções

(AFA - 2009) Dois corpos A e B, esfricos, inicialmente estacionrios no espao, com massas respectivamente iguais a mAe mB, encontram-se separados, centro a centro, de uma distncia x muito maior que os seus raios, conforme figura abaixo. Na ausncia de outras foras de interao, existe um ponto P do espao que se localiza a uma distncia d do centro do corpo A. Nesse ponto P nula a intensidade da fora gravitacional resultante, devido ao dos corpos A e B sobre um corpo de prova de massa m, ali colocado. Considere que os corpos A e B passem a se afastar com uma velocidade constante ao longo de uma trajetria retilnea que une os seus centros e que mA= 16mB. Nessas condies, o grfico que melhor representa d em funo de x

(AFA - 2009) Na situao de equilbrio abaixo, os fios e as polias so ideais e a acelerao da gravidade g. Considere eo coeficiente de atrito esttico entre o bloco A, de massa mA, e o plano horizontal em que se apia. A maior massa que o bloco B pode ter, de modo que o equilbrio se mantenha,

(AFA - 2009) Read the cartoon and answer questions 09 and 10 according to it. When Charlie Brown was asked by Lucy he

(AFA - 2009) A figura abaixo representa um vago em repouso, no interior do qual se encontram um pndulo simples e um recipiente fixo no piso, cheio de gua. O pndulo simples composto de uma bolinha de ferro presa ao teto do vago por um fio ideal e, dentro do recipiente, existe uma bolinha de isopor, totalmente imersa na gua e presa no seu fundo tambm por um fio ideal. Assinale a alternativa que melhor representa a situao fsica no interior do vago, se este comear a se mover com acelerao constante para a direita.

(AFA - 2009) Read the cartoon and answer questions 09 and 10 according to it. The cartoons also show that Charlie Brown

(AFA - 2009) Questions 11 to 14 are related to the following text. Dealing with Sensitive Materials on the Internet With the emergency of user-friendly online systems, the World Wide Web and its introduction into the classroom, more and more children are taking advantage of the power of the internet. However, it remains largely an adult forum, and so itcarries with it adult subject matter. [6] Does it raise the question of what when adult topics and a childs naive explorations meet? The debate has raised not only questions of obscenity, harassment, free speech, and censorship, but also of government control of theInternet, and its very nature as a communications resource. Whatever the outcome of this war is, it will set a precedent for how society and government deal with the exchange of information in the future. Is the internet a free forum for discussion or is it a broadcasting service and therefore subjectto the same restrictions as television, print, or radio? Are to internet communications on the right privacy covered by the, or can e-mail messages be legally observed.? Are web pages free speech or are some subjects taboo on the internet because a child may stumble uponthem? And who is responsible for internet content in a communications medium where traditional publishing scenarios no longer apply and content can be posted anonymously? For people who wish to control or limit the use of theinternet, the issue of children and pornography has been a valuable tool for gaining public support. The key is to find a solution to protect our children while at the same time, avoid setting up a climate of control that will limit our rights as adults. (Adapted from Framework Level 3 Richmond) Complete the gap (line 6) with the right verbal tense.

(AFA - 2009) Um paciente, aps ser medicado s 10 h, apresentou o seguinte quadro de temperatura: A temperatura desse paciente s 11 h 30 min, em F,

(AFA - 2009) Um frasco de vidro, cujo volume 2000 cm3a 0 C, est completamente cheio de mercrio a esta temperatura. Sabe-se que o coeficiente de dilatao volumtrica do mercrio 1,8 x 10-4C-1e o coeficiente de dilatao linear do vidro de que feito o frasco 1,0 x 10-5C-1. O volume de mercrio que ir entornar, em cm3, quando o conjunto for aquecido at 100 C, ser

(AFA - 2009) Questions 11 to 14 are related to the following text. Dealing with Sensitive Materials on the Internet With the emergency of user-friendly online systems, the World Wide Web and its introduction into the classroom, more and more children are taking advantage of the power of the internet. However, it remains largely an adult forum, and so itcarries with it adult subject matter. Does it raise the question of what when adult topics and a childs naive explorations meet? The debate has raised not only questions of obscenity, harassment, free speech, and censorship, but also of government control of theInternet, and its very nature as a communications resource. Whatever the outcome of this war is, it will set a precedent for how society and government deal with the exchange of information in the future. Is the internet a free forum for discussion or is it a broadcasting service and therefore subjectto the same restrictions as television, print, or radio? [16] Are to internet communications on the right privacy covered by the, or can e-mail messages be legally observed.? Are web pages free speech or are some subjects taboo on the internet because a child may stumble uponthem? And who is responsible for internet content in a communications medium where traditional publishing scenarios no longer apply and content can be posted anonymously? For people who wish to control or limit the use of theinternet, the issue of children and pornography has been a valuable tool for gaining public support. The key is to find a solution to protect our children while at the same time, avoid setting up a climate of control that will limit our rights as adults. (Adapted from Framework Level 3 Richmond) The underlined question (lines 16 and 17) has been mixed up. Put the words in the right order according to the context.

(AFA - 2009) Questions 11 to 14 are related to the following text. Dealing with Sensitive Materials on the Internet With the emergency of user-friendly online systems, the World Wide Web and its introduction into the classroom, more and more children are taking advantage of the power of the internet. However, it remains largely an adult forum, and so itcarries with it adult subject matter. Does it raise the question of what when adult topics and a childs naive explorations meet? [7] The debate has raised not only questions of obscenity, harassment, free speech, and censorship, but also of government control of theInternet, and its very nature as a communications resource. Whatever the outcome of this war is, it will set a precedent for how society and government deal with the exchange of information in the future. Is the internet a free forum for discussion or is it a broadcasting service and therefore subjectto the same restrictions as television, print, or radio? Are to internet communications on the right privacy covered by the, or can e-mail messages be legally observed.? Are web pages free speech or are some subjects taboo on the internet because a child may stumble uponthem? And who is responsible for internet content in a communications medium where traditional publishing scenarios no longer apply and content can be posted anonymously? For people who wish to control or limit the use of theinternet, the issue of children and pornography has been a valuable tool for gaining public support. The key is to find a solution to protect our children while at the same time, avoid setting up a climate of control that will limit our rights as adults. (Adapted from Framework Level 3 Richmond) Mark the correct question to the answer below extracted from the text. The debate (line 7)

(AFA - 2009) Um estudante, querendo determinar o equivalente em gua de um calormetro, colocou em seu interior 250 g de gua fria e, aguardando um certo tempo, verificou que o conjunto alcanou o equilbrio trmico a uma temperatura de 20 C. Em seguida, acrescentou ao mesmo 300 g de gua morna, a 45 C. Fechando rapidamente o aparelho, esperou at que o equilbrio trmico fosse refeito; verificando, ento, que a temperatura final era de 30 C. Baseando-se nesses dados, o equivalente em gua do calormetro vale, em gramas,

(AFA - 2009) O diagrama a seguir representa o ciclo percorrido por 3 mols de um gs perfeito. Sabendo-se que no estado A a temperatura 23 C e considerando R = 8 J/mol K , o trabalho, em joules, realizado pelo gs no ciclo

(AFA - 2009) Questions 11 to 14 are related to the following text. Dealing with Sensitive Materials on the Internet With the emergency of user-friendly online systems, the World Wide Web and its introduction into the classroom, more and more children are taking advantage of the power of the internet. However, it remains largely an adult forum, and so itcarries with it adult subject matter. Does it raise the question of what when adult topics and a childs naive explorations meet?The debate has raised not only questions of obscenity, harassment, free speech, and censorship, but also of government control of theInternet, and its very nature as a communications resource. Whatever the outcome of this war is, it will set a precedent for how society and government deal with the exchange of information in the future. Is the internet a free forum for discussion or is it a broadcasting service and therefore subjectto the same restrictions as television, print, or radio? Are to internet communications on the right privacy covered by the, or can e-mail messages be legally observed.? Are web pages free speech or are some subjects taboo on the internet because a child may stumble uponthem? And who is responsible for internet content in a communications medium where traditional publishing scenarios no longer apply and content can be posted anonymously? For people who wish to control or limit the use of theinternet, the issue of children and pornography has been a valuable tool for gaining public support. The key is to find a solution to protect our children while at the same time, avoid setting up a climate of control that will limit our rights as adults. (Adapted from Framework Level 3 Richmond) Comparing the pieces of content the internet provides, it may be said that

(AFA - 2009) O gs contido no balo A de volume V e presso p suavemente escoado atravs de dutos rgidos e de volumes desprezveis, para os bales B, C, D e E, idnticos e inicialmente vazios, aps a abertura simultnea das vlvulas 1, 2, 3 e 4, como mostra a figura abaixo. Aps atingido o equilbrio, a presso no sistema de bales assume o valor . Considerando que no ocorre variao de temperatura, o volume de dois dos bales menores

(AFA - 2009) Warning: Flying is bad for your health Flying is the safest way to travel - or is it? Some doctors think the airplane is a dangerous place, especially for the old or the unhealthy. Although the airplane is pressurized, there is less oxygen than on the ground. So anyone who has had a heart attack should not try for at least two weeks after the attack. After an operation, you should stay on the ground for at least ten days. Sitting on a plane for many hours especially in economy class where there isnt very much leg room gives everyone aches and pain, so you should get some exercise, especially on long flights. Flying also causes dehydration. If you drink or eat too much, youll wake up feeling sick. Everyone needs to drink more in the air, but you shouldnt drink alcohol because it makes you even more thirsty. The most common problem is jet lag. You should change to your new time zone as soon as possible, and you shouldnt sleep if its still daylight. Crowded airports, long lines, and delays cause stress and high blood pressure. So, be careful! Flying is the safest way totravel, but is it the healthiest? (Move Up, Heinemann) According to the text its correct to affirm that