Física
Cargas Elétricas e EletrizaçãoInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosDeterminar a capacitância equivalente total Ceqt do circuito série abaixo:
Questões do ENEM: Instituto Nacional de Telecomunicações
Use os filtros para chegar às questões que interessam. Cada resultado abre em uma página própria com enunciado, alternativas e gabarito.
Resultados
98 questões encontradas. Mostrando a página 3 de 5.
0DE61C02-EF 0DE2F957-EF Física
DinâmicaInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosUma certa residência tem um chuveiro que apresenta uma potência elétrica de 5000 W e fica ligado em média 60 minutos por dia. Qual será a redução no consumo total da energia, ao longo do mês se a família reduzir o tempo de uso do chuveiro para 40 minutos por dia?0DDFED16-EF Física
DinâmicaInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosUm corpo de 2 kg, preso a uma mola ideal de constante elástica K = 200N / m está inicialmente em repouso sobre uma mesa horizontal sem atrito. O corpo é então deslocado 0,3 m de sua posição de equilíbrio e, no instante t1, ele é abandonado. É correto afirmar que o movimento harmônico simples realizado pelo corpo apresenta:0DDCC367-EF Física
DinâmicaInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosNa construção civil, é comum encontrarmos sistemas de roldanas empregados na realização de tarefas. Você precisa erguer uma caixa de argamassa até os andares superiores de um prédio em construção. Para isso, você utiliza uma corda e uma roldana que juntos suportam, no máximo, uma tensão de 600 N, para atender a essa exigência uma carga de 50 kg deverá ser elevada com uma aceleração máxima de:0DD92226-EF Física
CinemáticaInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosVocê se encontra no telhado de um edifício 46 m acima do solo, conforme figura. Seu professor de Física, que possui 1,82 m de altura, está caminhando próximo do edifício com uma velocidade constante de 1,20 m/s. Se você deseja jogar um ovo na cabeça dele, como experiência de queda livre, considerando g = 9,8 m/s², a posição que o professor deve estar quando você largar o ovo é:
0DD5C085-EF Física
Estática e HidrostáticaInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosNo interior de um sistema com cilindro e êmbolo, 2 moles de um gás ideal sofrem um aumento de pressão de 11 Pa para 16 Pa. O volume permanece constante e é igual a 0,332 m³. Assinale a alternativo incorreta:Dado: R = 8,3 J/mol.K.0DD23A92-EF Física
CalorimetriaInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosCom o frio, nada como um Chá Mate com leite para esquentar. Para preparar a bebida, você mistura 100 ml (100 g) de leite frio a 25 ºC com 150 ml (150 g) de Chá Mate a 90 ºC. Considere o calor específico do Chá Mate igual ao da água, cágua 1 cal / gº C = e o do leite, cleite 0,9 cal / gº C = C . A temperatura final da bebida será aproximadamente igual a:0DCF7B0D-EF Física
CalorimetriaInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosEm relação aos processos de transferência de calor, assinale a alternativa falsa:0DCB3E08-EF Física
CalorimetriaInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosDe acordo com a EMBRAPA, “Dentro de uma geladeira doméstica alcançam-se temperaturas entre 6 e 10°C na parte inferior e de 2 a -2°C na parte superior. No congelador, podem-se alcançar temperaturas entre -1°C e -4°C.” Você compra um produto importado em um empório com as seguintes instruções: “Conservar entre a temperatura mínima de 23ºF e a máxima de 50ºF”. Levando em consideração as informações da EMBRAPA, assinale a alternativa correta:011F9603-E6 Inglês
Voz Ativa e Passiva | Passive and Active VoiceInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosHow alcohol damages stem cell DNA and increases cancer risk.
LONDON (Reuters) - Drinking alcohol produces a harmful chemical in the body which can lead to permanent genetic damage in the DNA of stem cells, increasing the risk of cancer developing, according to research published on Wednesday.Working with mice in a laboratory, British scientists used chromosome analysis and DNA sequencing to examine the genetic damage caused by acetaldehyde, a harmful chemical produced when the body processes alcohol.Their findings offered more detail about how alcohol increases the risk of developing 7 types of cancer, including common forms such as breast and bowel cancer. It also showed how the body seeks to defend against the damage alcohol can do.“Some cancers develop due to DNA damage in stem cells. While some damage occurs by chance, our findings suggest that drinking alcohol can increase the risk of this damage,” said Ketan Patel, a professor at the Medical Research Council Laboratory of Molecular Biology, who co-led the study. The World Health Organization’s International Agency for Research on Cancer classifies alcohol as a Group 1 carcinogen, citing “convincing evidence” it causes cancer in humans.In Wednesday’s study, published in the journal Nature, Patel’s team gave diluted alcohol to mice and then analyzed the effect on the animals’ DNA. They found that acetaldehyde can break and damage DNA within blood stem cells, permanently altering the DNA sequences within these cells.This is important, Patel said, because when healthy stem cells become faulty, they can give rise to cancerous cells.Source: www.reuters.com/article/us-health-cancer-alcohol/how alcohol-damages-stem-celldna-and-increases-cancer-risk-idUSKB1ES1N2“Patel`s team gave diluted alcohol to mice.” (Passive Voice)
011ABA07-E6 Inglês
Adjetivos | AdjectivesInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosHow alcohol damages stem cell DNA and increases cancer risk.LONDON (Reuters) - Drinking alcohol produces a harmful chemical in the body which can lead to permanent genetic damage in the DNA of stem cells, increasing the risk of cancer developing, according to research published on Wednesday.Working with mice in a laboratory, British scientists used chromosome analysis and DNA sequencing to examine the genetic damage caused by acetaldehyde, a harmful chemical produced when the body processes alcohol.Their findings offered more detail about how alcohol increases the risk of developing 7 types of cancer, including common forms such as breast and bowel cancer. It also showed how the body seeks to defend against the damage alcohol can do.“Some cancers develop due to DNA damage in stem cells. While some damage occurs by chance, our findings suggest that drinking alcohol can increase the risk of this damage,” said Ketan Patel, a professor at the Medical Research Council Laboratory of Molecular Biology, who co-led the study. The World Health Organization’s International Agency for Research on Cancer classifies alcohol as a Group 1 carcinogen, citing “convincing evidence” it causes cancer in humans.In Wednesday’s study, published in the journal Nature, Patel’s team gave diluted alcohol to mice and then analyzed the effect on the animals’ DNA. They found that acetaldehyde can break and damage DNA within blood stem cells, permanently altering the DNA sequences within these cells.This is important, Patel said, because when healthy stem cells become faulty, they can give rise to cancerous cells.Source: www.reuters.com/article/us-health-cancer-alcohol/how alcohol-damages-stem-celldna-and-increases-cancer-risk-idUSKB1ES1N2Pate said: “When healthy stem cells become faulty, they can rise to cancerous cells.” (Opposite)
01173481-E6 Inglês
Interpretação de texto | Reading comprehensionInstituto Nacional de Telecomunicações · 2019DifícilEntre para guardar nos favoritosHow alcohol damages stem cell DNA and increases cancer risk.LONDON (Reuters) - Drinking alcohol produces a harmful chemical in the body which can lead to permanent genetic damage in the DNA of stem cells, increasing the risk of cancer developing, according to research published on Wednesday.Working with mice in a laboratory, British scientists used chromosome analysis and DNA sequencing to examine the genetic damage caused by acetaldehyde, a harmful chemical produced when the body processes alcohol.Their findings offered more detail about how alcohol increases the risk of developing 7 types of cancer, including common forms such as breast and bowel cancer. It also showed how the body seeks to defend against the damage alcohol can do.“Some cancers develop due to DNA damage in stem cells. While some damage occurs by chance, our findings suggest that drinking alcohol can increase the risk of this damage,” said Ketan Patel, a professor at the Medical Research Council Laboratory of Molecular Biology, who co-led the study. The World Health Organization’s International Agency for Research on Cancer classifies alcohol as a Group 1 carcinogen, citing “convincing evidence” it causes cancer in humans.In Wednesday’s study, published in the journal Nature, Patel’s team gave diluted alcohol to mice and then analyzed the effect on the animals’ DNA. They found that acetaldehyde can break and damage DNA within blood stem cells, permanently altering the DNA sequences within these cells.This is important, Patel said, because when healthy stem cells become faulty, they can give rise to cancerous cells.Source: www.reuters.com/article/us-health-cancer-alcohol/how alcohol-damages-stem-celldna-and-increases-cancer-risk-idUSKB1ES1N2Which statement is considered exception. (Text Comprehension)
011277B0-E6 Inglês
Infinitivo e gerúndio | Infinitive and gerundInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosThe key to staying young? Camouflage.
Pickles by Brian Crane
Source: www.gocomics.com/pickles
That’s the problem of getting older.” (Gerund Use)010F0584-E6 Inglês
Interpretação de texto | Reading comprehensionInstituto Nacional de Telecomunicações · 2019DifícilEntre para guardar nos favoritosThe key to staying young? Camouflage.
Pickles by Brian Crane
Source: www.gocomics.com/pickles
What is the main idea of the comics? (Text Comprehension)0109D593-E6 Inglês
Interpretação de texto | Reading comprehensionInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosFirst ever black hole image released.Astronomers have taken the first ever image of a black hole, which is located in a distant galaxy. It measures 40 billion km across - three million times the size of the Earth - and has been described by scientists as "a monster".The black hole is 500 million trillion km away and was photographed by a network of eight telescopes across the world It was captured by the Event Horizon Telescope (EHT), a network of eight linked telescopes.Prof Heino Falcke, of Radboud University in the Netherlands, who proposed the experiment, told BBC News that the black hole was found in a galaxy called M87."What we see is larger than the size of our entire Solar System," he said."It has a mass 6.5 billion times that of the Sun. And it is one of the heaviest black holes that we think exists. It is an absolute monster, the heavyweight champion of black holes in the Universe."The image shows an intensely bright "ring of fire", as Prof Falcke describes it, surrounding a perfectly circular dark hole. The bright halo is caused by superheated gas falling into the hole. The light is brighter than all the billions of other stars in the galaxy combined - which is why it can be seen at such distance from Earth.The edge of the dark circle at the centre is the point at which the gas enters the black hole, which is an object that has such a large gravitational pull, not even light can escape.The image matches what theoretical physicists and indeed, Hollywood directors, imagined black holes would look like, according to Dr Ziri Younsi, of University College London - who is part of the EHT collaboration."Although they are relatively simple objects, black holes raise some of the most complex questions about the nature of space and time, and ultimately of our existence," he said."It is remarkable that the image we observe is so similar to that which we obtain from our theoretical calculations. So far, it looks like Einstein is correct once again."But having the first image will enable researchers to learn more about these mysterious objects. They will be keen to look out for ways in which the black hole departs from what's expected in physics. No-one really knows how the bright ring around the hole is created. Even more intriguing is the question of what happens when an object falls into a black hole.Source: www.bbc.com/news/science-environment-47873592
“The image matches what theoretical physicists and indeed, Hollywood directors, imagined black holes would look like, according to Dr.Ziri Younsi” […] (Verb Synonym)0105FD20-E6 Inglês
Interpretação de texto | Reading comprehensionInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosFirst ever black hole image released.Astronomers have taken the first ever image of a black hole, which is located in a distant galaxy. It measures 40 billion km across - three million times the size of the Earth - and has been described by scientists as "a monster".The black hole is 500 million trillion km away and was photographed by a network of eight telescopes across the world It was captured by the Event Horizon Telescope (EHT), a network of eight linked telescopes.Prof Heino Falcke, of Radboud University in the Netherlands, who proposed the experiment, told BBC News that the black hole was found in a galaxy called M87."What we see is larger than the size of our entire Solar System," he said."It has a mass 6.5 billion times that of the Sun. And it is one of the heaviest black holes that we think exists. It is an absolute monster, the heavyweight champion of black holes in the Universe."The image shows an intensely bright "ring of fire", as Prof Falcke describes it, surrounding a perfectly circular dark hole. The bright halo is caused by superheated gas falling into the hole. The light is brighter than all the billions of other stars in the galaxy combined - which is why it can be seen at such distance from Earth.The edge of the dark circle at the centre is the point at which the gas enters the black hole, which is an object that has such a large gravitational pull, not even light can escape.The image matches what theoretical physicists and indeed, Hollywood directors, imagined black holes would look like, according to Dr Ziri Younsi, of University College London - who is part of the EHT collaboration."Although they are relatively simple objects, black holes raise some of the most complex questions about the nature of space and time, and ultimately of our existence," he said."It is remarkable that the image we observe is so similar to that which we obtain from our theoretical calculations. So far, it looks like Einstein is correct once again."But having the first image will enable researchers to learn more about these mysterious objects. They will be keen to look out for ways in which the black hole departs from what's expected in physics. No-one really knows how the bright ring around the hole is created. Even more intriguing is the question of what happens when an object falls into a black hole.Source: www.bbc.com/news/science-environment-47873592Which statement is considered incorrect or false in the text above. (Text Comprehension)
01028B29-E6 Inglês
Sinônimos | SynonymsInstituto Nacional de Telecomunicações · 2019FácilEntre para guardar nos favoritosMozambique Cyclone: “Almost everything is destroyed.”
People carry their personal effects through a flooded section of Praia Nova in Beira after the cyclone. Tropical Cyclone Idai destroyed and damaged homes and knocked out electricity and communications.
Cyclone Idai hit the city of Beira hard and the scale of damage is massive, say Red Cross and Red Crescent aid workers who reached the Mozambican city a few days ago. The scale of devastation is enormous. It seems that 90 per cent of the area is completely destroyed.”
The Red Cross and Red Crescent team was among the first to arrive in Beira since Cyclone Idai made landfall March 14-15. With Beira’s airport closed and roads cut off due to flooding, the team drove from Maputo, the capital city, before taking a helicopter for the last leg of the journey. “Almost everything is destroyed. Communication lines have been completely cut and roads have
been destroyed. Some affected communities are not accessible,” said LeSueur. “Beira has been severely battered. But we are also hearing that the situation outside the city could be even worse. Yesterday, a large dam burst and cut off the last road to the city.”
While the physical impact of Idai is beginning to emerge, the human impact is still unclear. Authorities in the country are warning that the death toll may climb beyond 1,000 people.
Heavy rain will continue in the coming days which may only exacerbate the dire situation and cause already saturated rivers to overflow.
Following its landfall in Mozambique, the cyclone continued west to Zimbabwe as a tropical storm, wreaking havoc in the eastern part of the country, with Manicaland Province being the hardest-hit. At least 31 deaths have been reported and over 100 people are missing in Zimbabwe.
Source: www.redcross.org/about-us/news-and -events/news/2019/mozambique-cyclone.html
“The scale of devastation is enormous. (Synonym)00FECF0C-E6 Inglês
Interpretação de texto | Reading comprehensionInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosMozambique Cyclone: “Almost everything is destroyed.”
People carry their personal effects through a flooded section of Praia Nova in Beira after the cyclone. Tropical Cyclone Idai destroyed and damaged homes and knocked out electricity and communications.
Cyclone Idai hit the city of Beira hard and the scale of damage is massive, say Red Cross and Red Crescent aid workers who reached the Mozambican city a few days ago. The scale of devastation is enormous. It seems that 90 per cent of the area is completely destroyed.”
The Red Cross and Red Crescent team was among the first to arrive in Beira since Cyclone Idai made landfall March 14-15. With Beira’s airport closed and roads cut off due to flooding, the team drove from Maputo, the capital city, before taking a helicopter for the last leg of the journey. “Almost everything is destroyed. Communication lines have been completely cut and roads have
been destroyed. Some affected communities are not accessible,” said LeSueur. “Beira has been severely battered. But we are also hearing that the situation outside the city could be even worse. Yesterday, a large dam burst and cut off the last road to the city.”
While the physical impact of Idai is beginning to emerge, the human impact is still unclear. Authorities in the country are warning that the death toll may climb beyond 1,000 people.
Heavy rain will continue in the coming days which may only exacerbate the dire situation and cause already saturated rivers to overflow.
Following its landfall in Mozambique, the cyclone continued west to Zimbabwe as a tropical storm, wreaking havoc in the eastern part of the country, with Manicaland Province being the hardest-hit. At least 31 deaths have been reported and over 100 people are missing in Zimbabwe.
Source: www.redcross.org/about-us/news-and -events/news/2019/mozambique-cyclone.html
“People carry their personal effects through a flooded section of Praia Nova in Beira” […] (Referent)00FB108D-E6 Inglês
Interpretação de texto | Reading comprehensionInstituto Nacional de Telecomunicações · 2019DifícilEntre para guardar nos favoritosMozambique Cyclone: “Almost everything is destroyed.”
People carry their personal effects through a flooded section of Praia Nova in Beira after the cyclone. Tropical Cyclone Idai destroyed and damaged homes and knocked out electricity and communications.
Cyclone Idai hit the city of Beira hard and the scale of damage is massive, say Red Cross and Red Crescent aid workers who reached the Mozambican city a few days ago. The scale of devastation is enormous. It seems that 90 per cent of the area is completely destroyed.”
The Red Cross and Red Crescent team was among the first to arrive in Beira since Cyclone Idai made landfall March 14-15. With Beira’s airport closed and roads cut off due to flooding, the team drove from Maputo, the capital city, before taking a helicopter for the last leg of the journey. “Almost everything is destroyed. Communication lines have been completely cut and roads have
been destroyed. Some affected communities are not accessible,” said LeSueur. “Beira has been severely battered. But we are also hearing that the situation outside the city could be even worse. Yesterday, a large dam burst and cut off the last road to the city.”
While the physical impact of Idai is beginning to emerge, the human impact is still unclear. Authorities in the country are warning that the death toll may climb beyond 1,000 people.
Heavy rain will continue in the coming days which may only exacerbate the dire situation and cause already saturated rivers to overflow.
Following its landfall in Mozambique, the cyclone continued west to Zimbabwe as a tropical storm, wreaking havoc in the eastern part of the country, with Manicaland Province being the hardest-hit. At least 31 deaths have been reported and over 100 people are missing in Zimbabwe.
Source: www.redcross.org/about-us/news-and -events/news/2019/mozambique-cyclone.html
Did the cyclone continue wreaking other countries besides Mozambique? (Text Comprehension)00F5BF7D-E6 Português
Interpretação de TextosInstituto Nacional de Telecomunicações · 2019MédioEntre para guardar nos favoritosVasco repudia "exposição constrangedora" de Sidão e elogia CasagrandeApós clubes e personalidades se manifestarem, foi a vez do Vasco comentar sobre a entrega do prêmio Craque do Jogo ao goleiro Sidão, após a derrota do cruzmaltino por 3 a 0 para o Santos. Em nota oficial, o clube carioca repudiou a "exposição constrangedora" de Sidão por parte da TV Globo, responsável pela entrega do prêmio de votação popular ao melhor jogador da partida.(uol.com.br)Com base na leitura do texto, a entrega do prêmio após o resultado da partida configura: