Astronomers are not only discovering planets around distant suns, they are also starting to measure those worlds with astonishing precision. The diameter of a super-Earth named Kepler 93B is now known to within an accuracy of 148 miles.
Wednesday, 20 August 2014
How do tornadoes form? - James Spann
Tornadoes are the most violent storms on Earth, with wind velocities that can exceed 200 miles per hour. How do these terrifying cyclones form? Meteorologist James Spann sheds light on the lifespan of tornadoes as they go from supercell thunderstorms to terrible twisters before eventually dissolving back into thin air.
Lesson by James Spann, animation by Província Studio.
Lesson by James Spann, animation by Província Studio.
Tuesday, 19 August 2014
Monday, 18 August 2014
How Magnets Produce Electricity 1954 US Navy Electromagnetism Prime
How a magnetic field effects a single atom, a group of atoms and a wire in a closed circuit with a meter.
US Navy training film MN-8016b
US Navy training film MN-8016b
Friday, 8 August 2014
The Origins of Mass
The Higgs boson was discovered in July of 2012 and is generally understood to be the origin of mass. While those statements are true, they are incomplete. It turns out that the Higgs boson is responsible for only about 2% of the mass of ordinary matter. In this dramatic new video, Fermilab’s Dr. Don Lincoln tells us the rest of the story.
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