Questões de Inglês

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More than 100 South African gold miners treated for smoke inhalation

 

  JOHANNESBURG (Reuters) – Hundreds of South African gold mine workers were rescued and over 100 treated for smoke inhalation after an underground fire, the National Union of Mineworkers (NUM) said on Thursday

  Safety is a huge issue in South Africa’s dangerous deep-level mines and a focus for investors. A spate of deaths at SibanyeStillwater’s gold operations, including a seismic event that killed seven miners in early May, has highlighted the risks.

  In the latest incident, more than 600 miners were initially trapped after a fire broke out at a mine east of Johannesburg operated by unlisted Gold One, NUM said.

  This comes almost two weeks after five miners died in an underground fire at a South African copper mine operated by unlisted Palabora Mining Company in Limpopo

  Company officials could not immediately be reached for comment.

  “As the NUM, we vehemently condemn this kind of incident as it is becoming a trend”, the union said in a statement.

(Disponível em: <https://www.reuters.com/article/us-safrica-mining-fire/more-than-100-south-african-gold-miners-treated-for-smoke-inhalation-idUS KBN1KG294>.)

According to the information reported by the National Union of Mineworkers (NUM), hundreds of South African mine workers:

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According to the graph above it is true to assert that

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Redefining the Kilogram

The kilogram is shrinking.

 

The official object that defines the mass of a kilogram is a tiny, 139-year-old cylinder of platinum and iridium that resides in a triple-locked vault near Paris. Because it is so important, scientists almost never take it out; instead they use copies called working standards. But the last time they did inspect the real kilogram, they found it is roughly five parts in 100 million heavier than all the working standards, which have been leaving behind a few atoms of metal every time they are put on scales. This is one of the reasons the kilogram may soon be redefined not by a physical object but through calculations based on fundamental constants.

 

“This [shrinking] is the kind of thing that happens when you have an object that needs to be conserved in order to have a standard,” says Peter Mohr, a physicist at the National Institute of Standards and Technology (NIST), who serves on the committee that oversees the International System of Units (SI). “Fundamental constants, on the other hand, are not going to change over time.”

 

The redefinition of the kilogram will be part of a planned larger overhaul to make SI units fully dependent on constants of nature. Representatives from 57 countries will vote on the proposed change this month at a conference in Versailles, France, and the new rules are expected to pass.

 

What will happen to the old kilogram artifacts after the redefinition? Rather than packing them off to museums, scientists plan to keep studying how they fare over time. “There is so much measurement history on these,” says physicist Stephan Schlamminger of NIST. “It would be irresponsible to not continue to measure them.”

Adaptado de: <https://www.scientificamerican.com/article/redefining-thekilogram/> Acessado em 10 de outubro de 2018.

All of the following are a synonym of shrink except for

Read the text below and answer the following question.

 

Redefining the Kilogram

The kilogram is shrinking.

 

The official object that defines the mass of a kilogram is a tiny, 139-year-old cylinder of platinum and iridium that resides in a triple-locked vault near Paris. Because it is so important, scientists almost never take it out; instead they use copies called working standards. But the last time they did inspect the real kilogram, they found it is roughly five parts in 100 million heavier than all the working standards, which have been leaving behind a few atoms of metal every time they are put on scales. This is one of the reasons the kilogram may soon be redefined not by a physical object but through calculations based on fundamental constants.

 

“This [shrinking] is the kind of thing that happens when you have an object that needs to be conserved in order to have a standard,” says Peter Mohr, a physicist at the National Institute of Standards and Technology (NIST), who serves on the committee that oversees the International System of Units (SI). “Fundamental constants, on the other hand, are not going to change over time.”

 

The redefinition of the kilogram will be part of a planned larger overhaul to make SI units fully dependent on constants of nature. Representatives from 57 countries will vote on the proposed change this month at a conference in Versailles, France, and the new rules are expected to pass.

 

What will happen to the old kilogram artifacts after the redefinition? Rather than packing them off to museums, scientists plan to keep studying how they fare over time. “There is so much measurement history on these,” says physicist Stephan Schlamminger of NIST. “It would be irresponsible to not continue to measure them.”

Adaptado de: <https://www.scientificamerican.com/article/redefining-thekilogram/> Acessado em 10 de outubro de 2018.

The artifact that represents the kilogram

Read the text below and answer the following question.

 

Redefining the Kilogram

The kilogram is shrinking.

 

The official object that defines the mass of a kilogram is a tiny, 139-year-old cylinder of platinum and iridium that resides in a triple-locked vault near Paris. Because it is so important, scientists almost never take it out; instead they use copies called working standards. But the last time they did inspect the real kilogram, they found it is roughly five parts in 100 million heavier than all the working standards, which have been leaving behind a few atoms of metal every time they are put on scales. This is one of the reasons the kilogram may soon be redefined not by a physical object but through calculations based on fundamental constants.

 

“This [shrinking] is the kind of thing that happens when you have an object that needs to be conserved in order to have a standard,” says Peter Mohr, a physicist at the National Institute of Standards and Technology (NIST), who serves on the committee that oversees the International System of Units (SI). “Fundamental constants, on the other hand, are not going to change over time.”

 

The redefinition of the kilogram will be part of a planned larger overhaul to make SI units fully dependent on constants of nature. Representatives from 57 countries will vote on the proposed change this month at a conference in Versailles, France, and the new rules are expected to pass.

 

What will happen to the old kilogram artifacts after the redefinition? Rather than packing them off to museums, scientists plan to keep studying how they fare over time. “There is so much measurement history on these,” says physicist Stephan Schlamminger of NIST. “It would be irresponsible to not continue to measure them.”

Adaptado de: <https://www.scientificamerican.com/article/redefining-thekilogram/> Acessado em 10 de outubro de 2018.

The Kilogram as we know it

Read the text below and answer the following question.

 

Do tweens and teens believe “fake news”?

 

Let's be clear: "Fake news" has always existed. From P.T. Barnum to Ripley's Believe It or Not to supermarket tabloids, selling outrageous ideas has long been a part of our culture. Most kids can tell the difference between the shocking stories they see in the checkout line and the more evenhanded reporting they see on the local TV news.

 

But today's fake online news sources so closely mimic real news that it's challenging even for adults to discern what's real and what's fake. Also, kids have less experience in and context for evaluating news sources, so certain words or images that might immediately tell an adult that something is fake or biased might not have the same effect on kids.

 

 According to Common Sense Media's report, News and America's Kids: How Young People Perceive and Are Impacted by the News, less than half of kids agree that they know how to tell fake news stories from real ones. When it comes to online news, the stats reveal a serious lack of faith:

 

Only about one in four kids who gets news online think that news posted online is "very accurate."

 

Only seven percent think news by people they don't know well is "very accurate."

 

Tweens are more likely than teens to think that news posted online is "very accurate."

 

The good news is that kids who get news from social media sites are trying to be careful readers. Most kids who get their news from social media say they pay "a lot" or "some" attention to the source the link on social media takes them to. And the majority who get news online say that when they come across information in a news story that they think is wrong, they "sometimes" or "often" try to figure out whether or not it's true.

Adaptado de: < https://www.commonsensemedia.org/news-andmedia-literacy/do-tweens-and-teens-believe-fake-news> Acessado em 19 de outubro de 2018.

The good news is that