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Tom Musk

Solar Water Pumps Wean Farmers From India's Archaic Grid - Bloomberg - 0 views

www.bloomberg.com/...from-india-s-archaic-grid.html

design solar energy india

shared by Tom Musk on 08 Feb 14 - No Cached
  • “Irrigation pumps may be the single largest application for solar in the country.”
Jason Dillon

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

www.nytimes.com/...many-the-green-superpower.html

shared by Jason Dillon on 07 May 15 - No Cached
  • 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. 
James Linzel

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

www.forbes.com/...ot-earths-garbage-into-the-sun

shared by James Linzel on 06 Oct 16 - No Cached
  • there’s a certain amount of energy keeping us bound to our world (gravitational potential energy)
    • James Linzel
      James Linzel on 06 Oct 16
       
      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)
  • ...4 more annotations...
  • 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.
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