Questões - AFA 2007 | Gabarito e resoluções

(AFA - 2007) Durante um show de patinao, o patinador, representado na figura, descreve uma evoluo circular, com velocidade escalar constante, de raio igual a 10,8 m. Considerando desprezveis quaisquer resistncias, a velocidade do patinador, ao fazer a referida evoluo, igual a Dados: sen 53 = 0,80, cos 53 = 0,60.

(AFA - 2007) The following extract is from a childrens school science book. Read it and answer questions 9 to 11. When houses are double glazed, only a relatively small amount of heat is lost through the windows. Double glazed windows have two panes of glass and are strapped between them, preventing escaping of the heat. Double glazing ensures that condensation is reduced snd noise is decreased. Heating bills can be reduced when double glazing is installed. People living near busy roads or airports also find that double glazing has to be fitted. (Taken from Exploring Grammar in Context - Cambridge University Press) only a relatively small amount of heat is lost through the windows. The boldface expression in the sentence can only be substituted for

(AFA - 2007) Um projtil de massa m incide horizontalmente sobre uma tbua com velocidade v1e a abandona com velocidade, ainda horizontal, v2. Considerando-se constante a fora exercida pela tbua de espessura d, pode-se afirmar que o tempo de perfurao dado por:

(AFA - 2007) The following extract is from a childrens school science book. Read it and answer questions 9 to 11. When houses are double glazed, only a relatively small amount of heat is lost through the windows. Double glazed windows have two panes of glass and are strapped between them, preventing escaping of the heat. Double glazing ensures that condensation is reduced snd noise is decreased. Heating bills can be reduced when double glazing is installed. People living near busy roads or airports also find that double glazing has to be fitted. (Taken from Exploring Grammar in Context - Cambridge University Press) Mark the option that means Heating bills can be reduced when double glazing is installed.

(AFA - 2007) Trs blocos, cujas massas mA= mB= m e mC= 2m, so ligados atravs de fios e polias ideais, conforme a figura. Sabendo-se que C desce com uma acelerao de 1 m/s2e que 0,2 o coeficiente de atrito entre B e a superfcie S, pode-se afirmar que o coeficiente de atrito entre A e S vale

(AFA - 2007) The following extract is from a childrens school science book. Read it and answer questions 9 to 11. When houses are double glazed, only a relatively small amount of heat is lost through the windows. Double glazed windows have two panes of glass and are strapped between them, preventing escaping of the heat. Double glazing ensures that condensation is reduced snd noise is decreased. Heating bills can be reduced when double glazing is installed. People living near busy roads or airports also find that double glazing has to be fitted. (Taken from Exploring Grammar in Context - Cambridge University Press) Mark the item that contains the right information about the text.

(AFA - 2007) Com relao fora de atrito, apresentam-se trs situaes e uma afirmao relativa a cada uma. Esto corretas as afirmaes:

(AFA - 2007) Uma vela acesa, flutuando em gua, matm-se sempre em equilbrio, ocupando a posio vertical. Sabendo-se que as densidades da vela e da gua so respectivamente 0,8 g/cm3e 1,0 g/m3, qual a frao da vela que permanecer sem queimar, quando a chama se apagar ao entrar em contato com a gua?

(AFA - 2007) Read the article below carefully and answer questions 12 to 14. Fireworks Fireworks constitute a variety of devices used for religious or entertainment purposes. They contain incendiary compounds that produce sound, color, smoke, or movement, or combinations of these. The ingredients consist of fuels, oxidizers, and modifying agents. The fuels used are charcoal, sulfur, antimony, sulfide, and powdered metals. Chlorates and nitrates usually provide oxygen for the reaction, since fireworks do not use atmospheric oxygen. Various colors are abtained from metals salts. Sodium produces yellow; copper, blue green; calcium, red; strontium, scarlet; and barium, green. Picric acid or sulfur tends to intensify the colors, and ammonium salts increase the shades obtainable. Addition of iron and aluminum powder provides sparks and fiery displays. The craft of blending mixtures packaging them is an ancient one in China, where firewoks for entertainment have been manufactured since the 13th century. In many places throughout the United States and Canada the sale of fireworks is restricted by law because of the danger of injury. (The International Encyclopedia) Que alternativa est correta em relao ao texto?

(AFA - 2007) Read the article below carefully and answer questions 12 to 14. Fireworks Fireworks constitute a variety of devices used for religious or entertainment purposes. They contain incendiary compounds that produce sound, color, smoke, or movement, or combinations of these. The ingredients consist of fuels, oxidizers, and modifying agents. The fuels used are charcoal, sulfur, antimony, sulfide, and powdered metals. Chlorates and nitrates usually provide oxygen for the reaction, since fireworks do not use atmospheric oxygen. Various colors are abtained from metals salts. Sodium produces yellow; copper, blue green; calcium, red; strontium, scarlet; and barium, green. Picric acid or sulfur tends to intensify the colors, and ammonium salts increase the shades obtainable. Addition of iron and aluminum powder provides sparks and fiery displays. The craft of blending mixtures packaging them is an ancient one in China, where firewoks for entertainment have been manufactured since the 13th century. In many places throughout the United States and Canada the sale of fireworks is restricted by law because of the danger of injury. (The International Encyclopedia) The craft of blending mistures packaging is an ancient one in China, where fireworks are used for religious purposes. The word onein this sentence

(AFA - 2007) Uma prancha de comprimento 4m e de massa 2Kg est apoiada nos pontos A e B, conforme a figura. Um bloco de massa igual a 10Kg colocado sobre a prancha distncia x = 1m da extremidade da direita e o sistema permanece em repouso. Nessas condies, o mdulo da fora que a prancha exerce sobre o apoio no ponto B , em newtons,

(AFA - 2007) Read the article below carefully and answer questions 12 to 14. Fireworks Fireworks constitute a variety of devices used for religious or entertainment purposes. They contain incendiary compounds that produce sound, color, smoke, or movement, or combinations of these. The ingredients consist of fuels, oxidizers, and modifying agents. The fuels used are charcoal, sulfur, antimony, sulfide, and powdered metals. Chlorates and nitrates usually provide oxygen for the reaction, since fireworks do not use atmospheric oxygen. Various colors are abtained from metals salts. Sodium produces yellow; copper, blue green; calcium, red; strontium, scarlet; and barium, green. Picric acid or sulfur tends to intensify the colors, and ammonium salts increase the shades obtainable. Addition of iron and aluminum powder provides sparks and fiery displays. The craft of blending mixtures packaging them is an ancient one in China, where firewoks for entertainment have been manufactured since the 13th century. In many places throughout the United States and Canada the sale of fireworks is restricted by law because of the danger of injury. (The International Encyclopedia) Change the sentence extracted from the text into passive voice. Chlorates and nitrates usually provide oxygen for the reaction.

QUESTO ANULADA!! (AFA - 2007) Na figura abaixo, as polias e os fios so ideais. Se o sistema est em quilbrio, pode-se afirmar que a razo a) b) c) d) QUESTO ANULADA!!

(AFA - 2007) O recipiente mostrado na figura apresenta 80% de sua capacidade ocupada por um lquido. Verifica-se que, para qualquer variao de temperatura, o volume da parte vazia permanece constante. Pode-se afirmar que a razo entre os coeficientes de dilatao volumtrica do recipiemte e do lquido vale:

(AFA - 2007) Read the passage below and answer questions 15 to 17. Who Moved My Cheese? Who Moved My Cheese? Its a parable that reveals deep truths about changes. Two little mice and two little men live in a labyrinth searching for some cheese - a metaphor used to express what we wish to have in life, from a good job to spiritual peace. One of them is successful and writes what he learnt from his experiences on the walls of the labyrinths. The scribbled words on the walls teach us how to deal with the changes to live with less stress and achieve much more success at work and personal life. Its clear that Who moved my cheese ? is