Magna Concursos

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Enunciado 3066133-1
Mining trucks are monstrous machines that guzzle fuel at a scarcely believable rate. Weighing 220 tonnes, they can get through 134 litres of diesel every hour. Little wonder then that mining companies are focusing their attention on these vehicles as the first step to reducing their carbon footprint.
Anglo American, in collaboration with several partners, is retrofitting a mining haul truck with hydrogen power technology. A first of its kind, the monster mining vehicle is being piloted in Limpopo, South Africa, at the firm’s Mogalakwena platinum mine. Due to be launched early 2022, the truck will be hybrid, with a hydrogen fuel cell providing roughly half of the power and a battery pack the other half.
Instead of having a tank of diesel that powers the motor, hydrogen enters the fuel cell and mixes with oxygen to create water in a chemical reaction catalysed by platinum, which generates the electricity needed to power the motors that drive the wheels. By rolling out this technology across its global truck fleet, Anglo American says it will be “taking the equivalent of half a million diesel cars ‘off the road”.
The construction sector, which includes mining, accounted for 39% of energy-related CO2 emissions in 2017, according to Davide Sabbadin, from the European Environmental Bureau. He says the sector will need to reduce its energy consumption by a third if it hopes to be compatible with the Paris Agreement. “While electric-powered vehicles, generally speaking, are less damaging to the environment than internal combustion engines on a life cycle analysis, this does not mean that they are green,” he says. It all hinges on how the hydrogen is produced. Some hydrogen is created using fossil fuels, which of course means there are substantial emissions as a result. “We should refrain from presenting hydrogen as a technological solution to all problems… all forms of hydrogen come at an environmental cost – water use, impacts on nature,” says Mr Sabbadin.
(Jesse Preyser. www.bbc.com, 21.12.2021. Adaptado)
De acordo com Davide Sabbadin, no quarto parágrafo,
 

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Enunciado 3066132-1
Mining trucks are monstrous machines that guzzle fuel at a scarcely believable rate. Weighing 220 tonnes, they can get through 134 litres of diesel every hour. Little wonder then that mining companies are focusing their attention on these vehicles as the first step to reducing their carbon footprint.
Anglo American, in collaboration with several partners, is retrofitting a mining haul truck with hydrogen power technology. A first of its kind, the monster mining vehicle is being piloted in Limpopo, South Africa, at the firm’s Mogalakwena platinum mine. Due to be launched early 2022, the truck will be hybrid, with a hydrogen fuel cell providing roughly half of the power and a battery pack the other half.
Instead of having a tank of diesel that powers the motor, hydrogen enters the fuel cell and mixes with oxygen to create water in a chemical reaction catalysed by platinum, which generates the electricity needed to power the motors that drive the wheels. By rolling out this technology across its global truck fleet, Anglo American says it will be “taking the equivalent of half a million diesel cars ‘off the road”.
The construction sector, which includes mining, accounted for 39% of energy-related CO2 emissions in 2017, according to Davide Sabbadin, from the European Environmental Bureau. He says the sector will need to reduce its energy consumption by a third if it hopes to be compatible with the Paris Agreement. “While electric-powered vehicles, generally speaking, are less damaging to the environment than internal combustion engines on a life cycle analysis, this does not mean that they are green,” he says. It all hinges on how the hydrogen is produced. Some hydrogen is created using fossil fuels, which of course means there are substantial emissions as a result. “We should refrain from presenting hydrogen as a technological solution to all problems… all forms of hydrogen come at an environmental cost – water use, impacts on nature,” says Mr Sabbadin.
(Jesse Preyser. www.bbc.com, 21.12.2021. Adaptado)
According to the first and second paragraphs, the hydrogen-powered mining vehicle
 

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Questão presente nas seguintes provas
Enunciado 3066131-1
Mining trucks are monstrous machines that guzzle fuel at a scarcely believable rate. Weighing 220 tonnes, they can get through 134 litres of diesel every hour. Little wonder then that mining companies are focusing their attention on these vehicles as the first step to reducing their carbon footprint.
Anglo American, in collaboration with several partners, is retrofitting a mining haul truck with hydrogen power technology. A first of its kind, the monster mining vehicle is being piloted in Limpopo, South Africa, at the firm’s Mogalakwena platinum mine. Due to be launched early 2022, the truck will be hybrid, with a hydrogen fuel cell providing roughly half of the power and a battery pack the other half.
Instead of having a tank of diesel that powers the motor, hydrogen enters the fuel cell and mixes with oxygen to create water in a chemical reaction catalysed by platinum, which generates the electricity needed to power the motors that drive the wheels. By rolling out this technology across its global truck fleet, Anglo American says it will be “taking the equivalent of half a million diesel cars ‘off the road”.
The construction sector, which includes mining, accounted for 39% of energy-related CO2 emissions in 2017, according to Davide Sabbadin, from the European Environmental Bureau. He says the sector will need to reduce its energy consumption by a third if it hopes to be compatible with the Paris Agreement. “While electric-powered vehicles, generally speaking, are less damaging to the environment than internal combustion engines on a life cycle analysis, this does not mean that they are green,” he says. It all hinges on how the hydrogen is produced. Some hydrogen is created using fossil fuels, which of course means there are substantial emissions as a result. “We should refrain from presenting hydrogen as a technological solution to all problems… all forms of hydrogen come at an environmental cost – water use, impacts on nature,” says Mr Sabbadin.
(Jesse Preyser. www.bbc.com, 21.12.2021. Adaptado)
The article was published in December 2021 to report
 

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Questão presente nas seguintes provas
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Mining trucks are monstrous machines that guzzle fuel at a scarcely believable rate. Weighing 220 tonnes, they can get through 134 litres of diesel every hour. Little wonder then that mining companies are focusing their attention on these vehicles as the first step to reducing their carbon footprint.
Anglo American, in collaboration with several partners, is retrofitting a mining haul truck with hydrogen power technology. A first of its kind, the monster mining vehicle is being piloted in Limpopo, South Africa, at the firm’s Mogalakwena platinum mine. Due to be launched early 2022, the truck will be hybrid, with a hydrogen fuel cell providing roughly half of the power and a battery pack the other half.
Instead of having a tank of diesel that powers the motor, hydrogen enters the fuel cell and mixes with oxygen to create water in a chemical reaction catalysed by platinum, which generates the electricity needed to power the motors that drive the wheels. By rolling out this technology across its global truck fleet, Anglo American says it will be “taking the equivalent of half a million diesel cars ‘off the road”.
The construction sector, which includes mining, accounted for 39% of energy-related CO2 emissions in 2017, according to Davide Sabbadin, from the European Environmental Bureau. He says the sector will need to reduce its energy consumption by a third if it hopes to be compatible with the Paris Agreement. “While electric-powered vehicles, generally speaking, are less damaging to the environment than internal combustion engines on a life cycle analysis, this does not mean that they are green,” he says. It all hinges on how the hydrogen is produced. Some hydrogen is created using fossil fuels, which of course means there are substantial emissions as a result. “We should refrain from presenting hydrogen as a technological solution to all problems… all forms of hydrogen come at an environmental cost – water use, impacts on nature,” says Mr Sabbadin.
(Jesse Preyser. www.bbc.com, 21.12.2021. Adaptado)
In the fragment from the third paragraph – By rolling out this technology across its global truck fleet –, the terms in bold can be correctly replaced, with no change in meaning, by
 

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Enunciado 3066073-1
Mining trucks are monstrous machines that guzzle fuel at a scarcely believable rate. Weighing 220 tonnes, they can get through 134 litres of diesel every hour. Little wonder then that mining companies are focusing their attention on these vehicles as the first step to reducing their carbon footprint.
Anglo American, in collaboration with several partners, is retrofitting a mining haul truck with hydrogen power technology. A first of its kind, the monster mining vehicle is being piloted in Limpopo, South Africa, at the firm’s Mogalakwena platinum mine. Due to be launched early 2022, the truck will be hybrid, with a hydrogen fuel cell providing roughly half of the power and a battery pack the other half.
Instead of having a tank of diesel that powers the motor, hydrogen enters the fuel cell and mixes with oxygen to create water in a chemical reaction catalysed by platinum, which generates the electricity needed to power the motors that drive the wheels. By rolling out this technology across its global truck fleet, Anglo American says it will be “taking the equivalent of half a million diesel cars ‘off the road”.
The construction sector, which includes mining, accounted for 39% of energy-related CO2 emissions in 2017, according to Davide Sabbadin, from the European Environmental Bureau. He says the sector will need to reduce its energy consumption by a third if it hopes to be compatible with the Paris Agreement. “While electric-powered vehicles, generally speaking, are less damaging to the environment than internal combustion engines on a life cycle analysis, this does not mean that they are green,” he says. It all hinges on how the hydrogen is produced. Some hydrogen is created using fossil fuels, which of course means there are substantial emissions as a result. “We should refrain from presenting hydrogen as a technological solution to all problems… all forms of hydrogen come at an environmental cost – water use, impacts on nature,” says Mr Sabbadin.
(Jesse Preyser. www.bbc.com, 21.12.2021. Adaptado)
The expression “Instead of”, at the beginning of the third paragraph, introduces
 

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Fernando vai aplicar parte de R$ 53.300,00 em um investimento que renderá 8% do valor aplicado em seis meses. Ele decidiu usar uma parte do dinheiro imediatamente e aplicar o restante, de maneira que o valor que ele receberá em seis meses (quantia aplicada mais o rendimento) seja igual ao valor que ele usará agora. A quantia que Fernando usará imediatamente é
 

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Sobre os lados do triângulo AEF estão os pontos C, D e G. O ponto G também está sobre o lado BC do retângulo ABCD, cuja área é 544 cm2, conforme mostra a figura, que também indica as medidas dos segmentos CE e CF.
Enunciado 3066102-1
Sabendo que o triângulo CDF é isósceles e que a razão entre a medida do segmento GA e a medida do segmento GE é igual a 0,8, a área do triângulo ABG, em cm2, é
 

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Um parede retangular, com 8 metros de comprimento por 3 metros de altura, será totalmente revestida por ladrilhos quadrados de 20 cm de lado. Parte desses ladrilhos serão brancos e custam R$ 6,00 cada e o restante será preto, ao custo de R$ 10,00 cada. Se o custo médio por ladrilho, nesse revestimento, for de R$ 8,90, a diferença entre o número de ladrilhos pretos e o de ladrilhos brancos será
 

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Em um torneio de tênis em duplas, havia duplas de homens, duplas de mulheres e duplas mistas, cada jogador participando de apenas uma dupla. Considerando o total de jogadores participantes, o número de mulheres excedia o de homens em 18. Os jogos desse torneio foram organizados de maneira que as duplas femininas disputaram jogos entre si, com cada dupla feminina jogando um único jogo com cada outra dupla feminina, num total de 300 jogos, e, para as outras duplas, cada dupla mista jogou um único jogo com cada dupla masculina. Se nesse torneio o número de duplas mistas excedia o número de duplas masculinas em 10 e o total de jogos disputados foi 716, o número total de participantes foi
 

Provas

Questão presente nas seguintes provas
2875888 Ano: 2022
Disciplina: Matemática
Banca: VUNESP
Orgão: UNICAMP
Provas:
Em um retângulo ABCD, o ponto E está sobre a metade do lado AB e os pontos F e G estão sobre os lados do retângulo, conforme mostra a figura.
Enunciado 3066040-1
O triângulo BEF é isósceles e a área do retângulo é 60 cm2. Logo, a área do triângulo EFG é
 

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