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Guest Message © 2012 DevFuse

IM Egdall's Profile User Rating: -----

IM Egdall's Photo
Reputation: 38 Good
Group:
Senior Members
Active Posts:
483 (0.71 per day)
Most Active In:
Relativity (150 posts)
Joined:
20-July 10
Profile Views:
4,252
Last Active:
User is offline Yesterday, 08:48 PM
Currently:
Offline

My Information

Member Title:
Molecule
Age:
Age Unknown
Birthday:
Birthday Unknown
Gender:
Male Male
Location:
Hollywood, FL
College Major/Degree:
physics/bachelor's
Favorite Area of Science:
modern physics
Occupation:
I teach modern physics courses for the non-expert at several lifelong learning institutes in South Florida.

Contact Information

E-mail:
Private
Website URL:
Website URL  http://marksmodernphysics.com
  1. Recent Status Updates
  2. About Me
  3. Topics
  4. Posts

Topics I've Started

  1. Dark Energy vs Fifth Force

    14 May 2012 - 08:25 PM

    Saw interesting article on testing dark energy and general relativity versus the idea that there is a fifth force affecting gravity out there. Seems like Einstein wins, at least so far:

    http://spaceandearth...s.html?spref=tw


    Comments?

  2. Dark Matter

    26 March 2012 - 09:27 PM

    So, based on the motion of stars in galaxies and galaxy cluster motion etc., there is roughly 5 times more "dark matter" than ordinary matter in the universe. No one knows what this dark matter is. But, presumedly, it is in our solar system. So how does it affect the orbits of our planets around the Sun and moons around the planets, not to mention comets etc. ?

    How is it that we can explain these orbits and motions to such great accuracy using general relativity and only the masses of the Sun, planets, moons, etc? These do not include the effects of dark matter. If there is 5 times as much dark matter as the ordinary matter which makes up our stellar objects, why does it not affect these motions more?

    Edited to fix my dumb typos.

  3. Put link in blog

    26 March 2012 - 09:04 PM

    I am pretty inept at this, but I still don't know how to put web links into my blog. I put in the URL address in my text, highlight it, and then press the blue LINK button. It does some code thing to the address, but when I do a Preview, there is no link. And how do I fill out the form that comes up? Any help is most appreciated.

  4. Uncertainty Inhererent in Nature

    27 January 2012 - 12:23 AM

    Old explanations was that the act of measuring one parameter disturbs the measurement of the other conjugate -- like determining a particle's position disturbs its momentum. But this is a simplification. New test with neutrons verifies the uncertainty is there independent of the disturbance! Because a so-called particle also behaves like a wave, and this wave-like nature makes determining both its position and momentum to arbitrary accuracy impossible. Cool!

    http://www.scienceda...20116095529.htm

  5. Blog subscription?

    2 November 2011 - 01:45 PM

    Several commenters have asked for the subscription hyperlink or e-mail service for my blog - It's Relative. Is there such a thing?

    Also how can I find how many views my blog has received?

    Any info is most appreciated.



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