Física
- Conteúdos Básicos
- Prova de 2015
- Faculdade de Medicina de São José do Rio Preto
- Dificuldade: Médio
- Com imagem
- Código da questão: D880301F-D8

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Analise a tirinha a seguir

A partir da tirinha, é correto afirmar que a linha de montagem fordista
A quantidade de bactérias em um líquido é diretamente proporcional à medida da turbidez desse líquido. O gráfico mostra, em escala logarítmica, o crescimento da turbidez x de um líquido ao longo do tempo t (medido em minutos), isto é, mostra log10x em função de t. Os dados foram coletados de 30 em 30 minutos, e uma curva de interpolação foi obtida para inferir valores intermediários.

Disponível em https://fankhauserblog.wordpress.com/.
Com base no gráfico, em quantas vezes a população de
bactérias aumentou, do instante t0 para o instante t1?
Em uma atividade experimental, um estudante é desafiado a descobrir a resistência elétrica ôhmica do conteúdo de uma caixa que esconde componentes do circuito elétrico representado na figura. Além do conteúdo da caixa, o circuito é constituído por dois resistores ôhmicos, um gerador ideal, um amperímetro ideal e fios de resistência desprezível.

O estudante observa que, quando o circuito está em funcionamento, o amperímetro indica 2 A. Considerando essas
informações, a resistência equivalente dos resistores associados dentro da caixa é igual a

Fatbergs are a growing scourge infesting cities around the world— some are more than 800 feet long and weigh more than four humpback whales. These gross globs, which can cause sewer systems to block up and even overflow, have been plaguing the U.S., Great Britain and Australia for the past decade, forcing governments and utilities companies to send workers down into the sewers armed with water hoses, vacuums and scrapers with the unenviable task of prying them loose.
"It is hard not to think of [fatbergs] as a tangible symbol of the way we live now, the ultimate product of our disposable, out of sight, out of mind culture," wrote journalist Tim Adams in The Guardian.
At their core, fatbergs are the accumulation of oil and grease that's been poured down the drain, congealing around flushed nonbiological waste like tampons, condoms and baby wipes. When fat sticks to the side of sewage pipes, the wipes and other detritus get stuck, accumulating layer upon layer of gunk in a sort of slimy snowball effect.
Fatbergs also collect other kinds of debris—London fatbergs have been cracked open to reveal pens, false teeth and even watches.
Restaurants are a big contributor to fatbergs: Thames Water, the London utilities company, found nine out of 10 fast-food eateries lacked adequate grease traps to stop fat from entering the sewers. Homeowners also contribute to the problem by pouring grease and fat down the sink.
Even though its component materials are soft, fatbergs themselves can be tough as rocks. Researchers have found a host of dangerous bacteria in fatbergs, including listeria and e.coli.
Fatbergs are notorious for their fetid smell, which can make even the hardiest sewer workers gag, and chipping away at one can release noxious gases.
The key to fatberg prevention is remembering the four Ps: Pee, poo, puke and (toilet) paper are the only things that should be flushed.
Newsweek, 14 March, 2019. Adaptado.

Fatbergs are a growing scourge infesting cities around the world— some are more than 800 feet long and weigh more than four humpback whales. These gross globs, which can cause sewer systems to block up and even overflow, have been plaguing the U.S., Great Britain and Australia for the past decade, forcing governments and utilities companies to send workers down into the sewers armed with water hoses, vacuums and scrapers with the unenviable task of prying them loose.
"It is hard not to think of [fatbergs] as a tangible symbol of the way we live now, the ultimate product of our disposable, out of sight, out of mind culture," wrote journalist Tim Adams in The Guardian.
At their core, fatbergs are the accumulation of oil and grease that's been poured down the drain, congealing around flushed nonbiological waste like tampons, condoms and baby wipes. When fat sticks to the side of sewage pipes, the wipes and other detritus get stuck, accumulating layer upon layer of gunk in a sort of slimy snowball effect.
Fatbergs also collect other kinds of debris—London fatbergs have been cracked open to reveal pens, false teeth and even watches.
Restaurants are a big contributor to fatbergs: Thames Water, the London utilities company, found nine out of 10 fast-food eateries lacked adequate grease traps to stop fat from entering the sewers. Homeowners also contribute to the problem by pouring grease and fat down the sink.
Even though its component materials are soft, fatbergs themselves can be tough as rocks. Researchers have found a host of dangerous bacteria in fatbergs, including listeria and e.coli.
Fatbergs are notorious for their fetid smell, which can make even the hardiest sewer workers gag, and chipping away at one can release noxious gases.
The key to fatberg prevention is remembering the four Ps: Pee, poo, puke and (toilet) paper are the only things that should be flushed.
Newsweek, 14 March, 2019. Adaptado.

Em meados de 2003, mais de 20 pessoas morreram no Brasil após terem ingerido uma suspensão de sulfato de bário utilizada como contraste em exames radiológicos. O sulfato de bário é um sólido pouquíssimo solúvel em água, que não se dissolve mesmo na presença de ácidos. As mortes ocorreram porque um laboratório farmacêutico forneceu o produto contaminado com carbonato de bário, que é solúvel em meio ácido. Um simples teste para verificar a existência de íons bário solúveis poderia ter evitado a tragédia. Esse teste consiste em tratar a amostra com solução aquosa de HCI e, após filtrar para separar os compostos insolúveis de bário, adiciona-se solução aquosa de H2SO4 sobre o filtrado e observa-se por 30 min.
TUBINO, M.; SIMONI, J. A. Refletindo sobre o caso Celobar®. Química Nova, n. 2, 2007 (adaptado).
A presença de íons bário solúveis na amostra é indicada pela
Desde o início de 2016, os analistas econômicos têm noticiado que o Brasil apresenta um PIB (Produto Interno Bruto) negativo, traçando um cenário pessimista para a economia nacional.
A expressão "PIB negativo" se refere

Fatbergs are a growing scourge infesting cities around the world— some are more than 800 feet long and weigh more than four humpback whales. These gross globs, which can cause sewer systems to block up and even overflow, have been plaguing the U.S., Great Britain and Australia for the past decade, forcing governments and utilities companies to send workers down into the sewers armed with water hoses, vacuums and scrapers with the unenviable task of prying them loose.
"It is hard not to think of [fatbergs] as a tangible symbol of the way we live now, the ultimate product of our disposable, out of sight, out of mind culture," wrote journalist Tim Adams in The Guardian.
At their core, fatbergs are the accumulation of oil and grease that's been poured down the drain, congealing around flushed nonbiological waste like tampons, condoms and baby wipes. When fat sticks to the side of sewage pipes, the wipes and other detritus get stuck, accumulating layer upon layer of gunk in a sort of slimy snowball effect.
Fatbergs also collect other kinds of debris—London fatbergs have been cracked open to reveal pens, false teeth and even watches.
Restaurants are a big contributor to fatbergs: Thames Water, the London utilities company, found nine out of 10 fast-food eateries lacked adequate grease traps to stop fat from entering the sewers. Homeowners also contribute to the problem by pouring grease and fat down the sink.
Even though its component materials are soft, fatbergs themselves can be tough as rocks. Researchers have found a host of dangerous bacteria in fatbergs, including listeria and e.coli.
Fatbergs are notorious for their fetid smell, which can make even the hardiest sewer workers gag, and chipping away at one can release noxious gases.
The key to fatberg prevention is remembering the four Ps: Pee, poo, puke and (toilet) paper are the only things that should be flushed.
Newsweek, 14 March, 2019. Adaptado.
