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Jac Londe

NOVA | Parallel Worlds, Parallel Lives | PBS - 0 views

www.pbs.org/manyworlds

Onde Everett science

shared by Jac Londe on 23 Oct 08 - Cached
  • Jac Londe on 23 Oct 08
     
    Visit the companion website to the NOVA program Parallel Worlds, Parallel Lives, and follow Mark Oliver Everett's journey to learn about his father Hugh Everett, who created a radical theory of quantum physics." /> <!-- banner files --->
Jac Londe

Why is space three-dimensional? - 0 views

phys.org/...5-space-three-dimensional.html

4d 3d 3dspace space espace

shared by Jac Londe on 09 May 16 - No Cached
  • Jac Londe on 09 May 16
     
    (Phys.org)-The question of why space is three-dimensional (3D) and not some other number of dimensions has puzzled philosophers and scientists since ancient Greece. Space-time overall is four-dimensional, or (3 + 1)-dimensional, where time is the fourth dimension. It's well-known that the time dimension is related to the second law of thermodynamics: time has one direction (forward) because entropy (a measure of disorder) never decreases in a closed system such as the universe.
Jac Londe

Scientists suggest spacetime has no time dimension - 0 views

www.physorg.com/...tists-spacetime-dimension.html

time science spacetime scientists

shared by Jac Londe on 02 May 11 - No Cached
  • Scientists propose that clocks measure the numerical order of material change in space, where space is a fundamental entity; time itself is not a fundamental physical entity.
  • They propose to replace these concepts of time with a view that corresponds more accurately to the physical world: time as a measure of the numerical order of change.
  • No time dimension
  • ...2 more annotations...
  • “Einstein said, ‘Time has no independent existence apart from the order of events by which we measure it,’”
  • “Newton theory on absolute time is not falsifiable, you cannot prove it or disprove it, you have to believe in it,” Sorli said. “The theory of time as the fourth dimension of space is falsifiable and in our last article we prove there are strong indications that it might be wrong. On the basis of experimental data, time is what we measure with clocks: with clocks we measure the numerical order of material change, i.e., motion in space.”
Jac Londe

Heliophysics nugget: Riding the plasma wave - 0 views

phys.org/...eliophysics-nugget-plasma.html

riding plasma wave onde science ScienceHack

shared by Jac Londe on 23 Jul 12 - No Cached
  • Throughout the universe more than 99 percent of matter looks nothing like what's on Earth.
  • This material that pervades the universe, making up the stars and our sun, and also – far less densely, of course – the vast interstellar spaces in between, is called plasma. Plasmas are similar to gases, and indeed are made of familiar stuff such as hydrogen, helium, and even heavier elements like iron, but each particle carries electrical charge and the particles tend to move together as they do in a fluid.
  • "Which particles are moving, what is the source of energy for the motion, how does a moving wave interact with the particles themselves, do the wave fields rotate to the right or to the left – all of these get classified," says Lynn Wilson who is a space plasma physicist at NASA's Goddard Space Flight Center in Greenbelt, Md.
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