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James Linzel

Ask Ethan: Why Don't We Shoot Earth's Garbage Into The Sun? - 0 views

  • there’s a certain amount of energy keeping us bound to our world (gravitational potential energy)
    • James Linzel
       
      Ep=mass x Acc-g x distance
  • For Earth, we’d have to move at about 7.9 km/s (17,700 mph) to attain orbit and at about 11.2 km/s (25,000 mph) to escape from Earth’s gravity.
  • Earth moves around the Sun at approximately 30 km/s (67,000 mph)
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  • If we wanted to escape from the Solar System completely, we’d only have to gain another 12 km/s of speed (for a total of 42 km/s) to get out of here!
  • There are two ways a spacecraft can take advantage of a gravity assist: To fly the spacecraft so that it comes from behind a planet, flies in front of it and gets gravitationally sling-shotted back behind the planet again. To fly the spacecraft so that it comes from ahead of a planet’s orbit, flies behind it and gets gravitationally sling-shotted back in front of the planet again.
  • There are two ways a spacecraft can take advantage of a gravity assist: To fly the spacecraft so that it comes from behind a planet, flies in front of it and gets gravitationally sling-shotted back behind the planet again. To fly the spacecraft so that it comes from ahead of a planet’s orbit, flies behind it and gets gravitationally sling-shotted back in front of the planet again.
  • in the first case, the planet tugs on the spacecraft and the spacecraft tugs on the planet in such a way that the planet winds up gaining a little bit of speed with respect to the Sun, becoming slightly more loosely bound, while the spacecraft loses quite a bit of speed (thanks to its much smaller mass), and becomes more tightly bound: transferring to a lower-energy orbit. The second case works the opposite way: the planet loses a little speed and becomes more tightly bound, while the spacecraft gains quite a lot of speed and transfers to a higher-energy orbit.
Jason Dillon

Exxon's Never-Ending Big Dig - BillMoyers.com - 0 views

  • The deepest problem is Exxon’s business plan. The company spends huge amounts of money searching for new hydrocarbons. Given the recent plunge in oil prices, its capital spending and exploration budget was indeed cut by 12 percent in 2015 to $34 billion, and another 25 percent in 2016 to $23.2 billion. In 2015, that meant Exxon was spending $63 million a day “as it continues to bring new projects on line.” They are still spending a cool $1.57 billion a year looking for new sources of hydrocarbons — $4 million a day, every day.
  • That’s why it’s wildly irresponsible for a company to be leading the world in oil exploration when, as scientists have carefully explained, we already have access to four or five times as much carbon in the Earth as we can safely burn.
Jason Dillon

Germany, the Green Superpower - NYTimes.com - 1 views

  • what the Germans have done in converting almost 30 percent of their electric grid to solar and wind energy from near zero in about 15 years has been a great contribution to the stability of our planet and its climate.
  • “In my view the greatest success of the German energy transition was giving a boost to the Chinese solar panel industry,” said Ralf Fücks, the president of the Heinrich-Böll-Stiftung, the German Green Party’s political foundation. “We created the mass market, and that led to the increased productivity and dramatic decrease in cost.”
  • A German foreign policy official put their dilemma this way: “We have to get used to assuming more leadership and be aware of how reluctant others are to have Germany lead — so we have to do it through the E.U.”Here’s my prediction: Germany will be Europe’s first green, solar-powered superpower. Can those attributes coexist in one country, you ask? They’re going to have to. 
Jason Dillon

Investing in Energy Efficiency Pays Off - NYTimes.com - 0 views

  • The idea that money is available for the taking defies economic logic. But sometimes it’s true.
  • The opportunity is investing in energy efficiency. “The returns are tremendous, and there’s virtually no risk,” said Mark Orlowski, the founder and executive director of the Sustainable Endowments Institute,
  • Although no one is refusing to consider the idea, he explained, “People say, ‘We’re overloaded and this isn’t a fire that needs to be put out now.’ But if they actually did an energy audit, they would find millions of dollars in savings — and that money could be used for all sorts of things: scholarships, new faculty positions, even more pay for the university president.”
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  • David Bornstein is the author of “How to Change the World,” which has been published in 20 languages, and “The Price of a Dream: The Story of the Grameen Bank,” and is co-author of “Social Entrepreneurship: What Everyone Needs to Know.” He is a co-founder of the Solutions Journalism Network, which supports rigorous reporting about responses to social problems.
Tom Musk

Nanjing confirms thaw in China-Japan ties - Al Jazeera Blogs - 0 views

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    Update on Nanjing Memorial. Relations thawing.
Tom Musk

Issues and Trends in China's Demographic History | Asia for Educators | Columbia Univer... - 0 views

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    Overview of the demographic trends in China. Great for the course.
Jason Dillon

Why Save a Language? - NYTimes.com - 0 views

  • Russian speakers are on average 124 milliseconds faster than English speakers at identifying when dark blue shades into light blue. A French person is a tad more likely than an Anglophone to imagine a table as having a high voice if it were a cartoon character, because the word is marked as feminine in his language.This is cool stuff. But the question is whether such infinitesimal differences, perceptible only in a laboratory, qualify as worldviews — cultural standpoints or ways of thinking that we consider important. I think the answer is no.
  • In Mandarin Chinese, for example, you can express If you had seen my sister, you’d have known she was pregnant with the same sentence you would use to express the more basic If you see my sister, you know she’s pregnant. One psychologist argued some decades ago that this meant that Chinese makes a person less sensitive to such distinctions, which, let’s face it, is discomfitingly close to saying Chinese people aren’t as quick on the uptake as the rest of us. The truth is more mundane: Hypotheticality and counterfactuality are established more by context in Chinese than in English.
  • But if a language is not a worldview, what do we tell the guy in the lecture hall? Should we care that in 100 years only about 600 of the current 6,000 languages may be still spoken?The answer is still yes, but for other reasons.
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  • Cultures, to be sure, show how we are different. Languages, however, are variations on a worldwide, cross-cultural perception of this thing called life.Surely, that is something to care about.
  • John McWhorter teaches linguistics, American studies and music history at Columbia University. His latest book is “The Language Hoax: Why the World Looks the Same in Any Language.”
Jason Dillon

The 14-Year-Old Voice of the Climate Change Generation | BillMoyers.com - 0 views

  • In October, in his keynote address to the 2014 National Bioneers Conference in San Rafael, California, he told the assembled crowd, “In the light of a collapsing world, what better time to be born than now? Because this generation gets to rewrite history, gets to leave our mark on this earth.… We will be known as the generation, as the people on the planet, that brought forth a healthy, just, sustainable world for every generation to come. … We are the generation of change.”In December, HBO will debut the music video “Be the Change,” by Martinez’ hip-hop group, Voice of Youth.
James Linzel

Experts be damned: World population will continue to rise | Science/AAAS | News - 0 views

  • there’s a 95% chance the world population will be between 9 billion and 13.2 billion by the year 2100,
Jason Dillon

Could Fighting Global Warming Be Cheap and Free? - NYTimes.com - 0 views

  • Climate despair is all wrong. The idea that economic growth and climate action are incompatible may sound hardheaded and realistic, but it’s actually a fuzzy-minded misconception. If we ever get past the special interests and ideology that have blocked action to save the planet, we’ll find that it’s cheaper and easier than almost anyone imagines.
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