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Uma joalheria utiliza metais mais baratos e os recobre com metais preciosos, como o ouro, para deixá-los mais atraentes ao comprador e mais resistentes à corrosão. Em um processo de eletrodeposição, um colar de prata foi revestido com 2,364 g de ouro, proveniente de uma solução eletrolítica que contém íons Au3+ .
Se a intensidade da corrente elétrica utilizada foi de 19,3 A, quantos minutos, aproximadamente, durou a eletrodeposição?
Dados: massa atômica do Au = 197 u; F = 96.500 C/mol.
Texts for question.
"The white man is very clever. He came quietly and peaceably with his religion.… He has put a knife on the things that held us together and we have fallen apart.”
ACHEBE, Chinua. The African Trilogy: Things Fall Apart; Arrow of God; No Longer at Ease. New York: Penguin Classics, 2017.
“No pedagogy which is truly liberating can remain distant from the oppressed; nor can it afford to impose the teacher’s cultural patterns upon them.”
FREIRE, Paulo. Pedagogy of the Oppressed. Translated by Myra Bergman Ramos. New York: Herder and Herder, 1970.
"Once critical pedagogues see schools as cultural arenas where distinct social and ideological forms find themselves in constant conflict, what they shall be seeking is society transformation through education, including language education."
SIQUEIRA, Sávio. Critical pedagogy and language education: Hearing the voices of Brazilian teachers of English. Education Sciences, Basel, v. 11, n. 5, p. 235, May 14, 2021.
Text for question
When international companies and organizations developed, English was often chosen as a working language of European Central Bank, although the bank is in Germany. In Asia and the Pacific, nine out of ten international organizations work only in English.
English is important not because it has more first - language speakers than other languages (Chinese has more) but because it is used extremely widely. Will this situation continue?
VINEY, Brigit. Oxford Bookworms Factfiles: The History of the English Language: Level 4: 1400-Word Vocabulary. Oxford: Oxford University Press, 2008.
https://www.newyorker.com/magazine/2025/07/07/the-argentinean-comic-strip-that-galvanized-a-generation. Acesso em 04 fev.2026.
Text for question
“I always tried to be decent to the warders in my section; hostility was self-defeating. There was no point in having a permanent enemy among warders.
It was ANC policy to try to educate all people, even our enemies: we believed that all men, even prison service warders, were capable of change, and we did our utmost to try to sway them.
In general we treated the wanders as they treated us. If a man was considered, we were considerate in return. Not all of our warders were ogres. We noticed right from the start that there were some among them who believed in fairness.”
MANDELA, Nelson. Long Walk to Freedom. Boston; New York: Little, Brown and Company, 1994.
Text for question
The notion of Multiliteracies supplements traditional literacy pedagogy by addressing these two related aspects of textual multiplicity. What we might term ‘mere literacy’ remains centred on language only, and usually on a singular national form of language at that, being conceived as a stable system based on rules such as mastering sound-letter correspondence. This is based on the assumption that we can actually discern and describe correct usage. Such a view of language must characteristically translate into a more or less authoritarian kind of pedagogy. A pedagogy of Multi-literacies, by contrast, focuses on modes of representation much broader than language alone. These differ according to culture and context, and have specific cognitive, cultural, and social effects. In some cultural contexts – in an Aboriginal community or in a multimedia environment, for instance – the visual mode of representation may be much more powerful and closely related to language than ‘mere literacy’ would ever be able to allow. Multiliteracies also creates a different kind of pedagogy: one in which language and other modes of meaning are dynamic representational resources, constantly being remade by their users as they work to achieve their various cultural purposes.
COPE, Bill; KALANTZIS, Mary (org.). Multiliteracies: literacy learning and the design of social futures. Londres: Routledge, 2000.
Text for question.
I believe that on the first night I went to Gatsby’s house I was one of the few guests who had actually been invited. People were not invited – they went there. They got into automobiles which bore them out to Long Island, and somehow they ended up at Gatsby’s door. Once there they were introduced by somebody who knew Gatsby, and after that they conducted themselves according to the rules of behavior associated with amusement parks. Sometimes they came and went without having met Gatsby at all, came for the party with a simplicity of heart that was its own ticket of admission.
I had been actually invited. A chauffeur in a uniform of robin’s-egg blue crossed my lawn early that Saturday morning with a surprisingly formal note from his employer: the honor would be entirely Gatsby’s, it said, if I would attend his “little party” that night. He had seen me several times, and had intended to call on me long before, but a peculiar combination of circumstances had prevented it – signed Jay Gatsby, in a majestic hand.
Dressed up in white flannels I went over to his lawn a little after seven, and wandered around rather ill at ease among swirls and eddies of people I didn’t know – though here and there was a face I had noticed on the commuting train. I was immediately struck by the number of young Englishmen dotted about; all well dressed, all looking a little hungry, and all talking in low, earnest voices to solid and prosperous Americans. I was sure that they were selling something: bonds or insurance or automobiles. They were at least agonizingly aware of the easy money in the vicinity and convinced that it was theirs for a few words in the right key.
FITZGERALD, F. S. The Great Gatsby. Charles Scribner's Sons, 1925. p. 41-42
Read the text below and answer question.
Sometimes when we have talked or written about using ideas from complexity theory, we have been challenged as to whether we are 'just' being metaphorical. There are two ways to answer this question: firstly, to reject the 'just' and to assert the importance of metaphor; and secondly, to discuss what it would mean to say that the comparison between systems in applied linguistics and complex systems is more than metaphor. Our contention, to be supported throughout this book, is that complexity theory off ers applied linguistics at least an important new metaphor that brings with it new ways of thinking about issues in the field, and, maximally, may push the field towards radical theoretical change. (…) Metaphors are not just literary tools for ornamenting language; they are indispensable to the human mind. Whenever we have to contemplate the abstract, voice the difficult, or make sense of the complicated, we turn to metaphor. Metaphor enables us to 'see' or understand one thing in terms of another, through analogies or mappings between two conceptual domains.
(Cameron 1999). LARSEN-FREEMAN, Diane; CAMERON, Lynne. Complex systems and applied linguistics. Oxford: Oxford University Press, 2008. p. 11.
I. The authors argue that complexity theory should be seen primarily as a rhetorical or literary device in applied linguistics.
II. According to the text, one response to the criticism about metaphor is to emphasize the fundamental importance of metaphors in human cognition.
III. The authors claim that complexity theory may contribute not only to new ways of thinking but also to potentially radical theoretical changes in applied linguistics.
IV. The text suggests that metaphors are mainly used to embellish language rather than to support understanding of abstract or complex ideas.
V. Metaphor is presented as a cognitive tool that allows understanding one conceptual domain in terms of another through analogies or mappings.
Read the text below and answer question.
Language learning, like any other type of learning, is not a linear process and therefore cannot be deemed as predictable as some of these models of acquisition have hypothesized it to be. Minimal differences in initial conditions can cause very different results. Nevertheless, I consider that the previous attempts to explain SLA should not be disregarded because when they are put together they provide a broader view of the phenomenon. In this new perspective, a SLA model should be considered as a set of connections within a dynamic system that moves in the direction of the “edge of chaos” considered as a zone of creativity with the maximum potential for learning.
PAIVA, V. L. M. O. Second Language Acquisition: Reconciling Theories. Open Journal of Applied Sciences, 2013, 3, 404-412. Disponível em: http://dx.doi.org/10.4236/ ojapps.2013.37050.
UN: Iran using drones to enforce hijab law
A report by the United Nations says Iran is using advanced technology, including drones, facial recognition and a citizen-reporting app to crack down _______ violations of its mandatory hijab laws.
A key element of the eff ort is the government - backed Nazer app, which enables the police and "vetted" members of the public to report alleged violations by women in vehicles, including those in ambulances, mass transit and taxis.
The report describes the app as allowing users to upload the vehicle license plate, location and time of an alleged violation. It then, according to the report, alerts police. Then, according to the report, the app "triggers a text message (in real-time) to the registered owner of the vehicle, warning them that they had been found ______ violation of the mandatory hijab laws, and that their vehicles would be impounded for ignoring these warnings."
According to the report, authorities are using drones in Tehran and the southern part of the country to monitor hijab compliance in public areas, as well as new facial recognition software said to have been installed last year _______ the entrance of Tehran’s Amirkabir University.
(Source: VOA News, March 15th, 2025. UN: Iran using drones to enforce hijab law.
Available at: https://www.voanews.com/a/un-iran-using-drones-to-enforce-hijab-law/8011563.html)
While ESP teachers may have some understanding of the fields in which their students work, these teachers do not have to be knowledgeable in all of these fields. A degree in law or medicine is not required of teachers in ESP courses for lawyers or doctors. In ESP, teachers’ and students’ roles are different but complementary. Teachers are the language education specialists; they know (about) English in addition to having pedagogical skills. Students, on the other hand, have some knowledge of their professional field (generally in their first language) and usually have a real motivation to learn the language (e.g., communicate with clients, read a manual, be promoted). It is not possible to generalize, however, whether they know English.
SARMENTO, S.; VIANA, V.; BOCORNY, Ana E. English for Specific Purposes (ESP). TESOL Press: 2018.