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Energy cycles

  1. Jul 28, 2010 #1
    Hy. From what it is known today, are there any forces that go up and down in cycles ? This regarding planet earth. I talk about whatever forces in the solar system and zodiac. Something like a few days or weeks up then down, then up then down etc.
    Thanks!
     
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  3. Jul 28, 2010 #2

    berkeman

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    Because the orbit of the Earth around the Sun is elliptical (the radius varies), the gravitational attractive force between the Sun and Earth varies throughout the year. Is that what you mean?
     
    Last edited: Jul 28, 2010
  4. Jul 28, 2010 #3

    russ_watters

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    Tidal forces, as well.
     
  5. Jul 29, 2010 #4
    And this force is a cycle of about two weeks up and two weeks down ?
    Thanks!
     
  6. Jul 29, 2010 #5

    Janus

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    No. He said "over the course of a year", not "over a course of four weeks".

    Now the Moon orbits in just a little under 4 weeks, and it also has an eccentric orbit, so its tidal effects will vary slightly over that time. But at this point, I have to ask: Why do you ask? What exactly are you looking for?
     
  7. Jul 29, 2010 #6
    I'm looking if there is some cycles of forces that interract with earth ?
     
    Last edited: Jul 29, 2010
  8. Jul 29, 2010 #7

    berkeman

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    Why don't you list everything you can think of first, and then we'll let you know if you've left anything out.
     
  9. Jul 30, 2010 #8
    I don't know.
     
  10. Jul 31, 2010 #9

    Janus

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    That's too vague. For what reason do you want this information? What do you expect to learn from it? I mean, technically, everything in the universe exerts some force on the Earth. It's just that for the vast majority it is negligible for all practical purposes.
     
  11. Aug 1, 2010 #10
    I feel something but i don't know what. It will be ok to tell me waht you know or to point me where to look.
    Thanks!
     
  12. Aug 1, 2010 #11

    Chronos

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    We do know with a fair degree of certainty most of the forces in universe have been remarkably consistant for billions of years. See, for example, the alpha constant.
     
  13. Aug 2, 2010 #12
    I didn't knew about the alpha constant. I'm gona read more about it.
    What else there is ?
    Thanks!
     
  14. Aug 8, 2010 #13
    Hmm. There's not something else ?
     
  15. Aug 9, 2010 #14

    russ_watters

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    Sorry, but vague/ill-formed questions tend not to get a lot of responses because there really isn't anything to respond to. You'll need to ask better questions to get more/better responses.
     
  16. Aug 9, 2010 #15
    If i take a piece of paper and i want to write everything that's "in the air". What that would be ? gravitation, radiation, rays ...
    What else ?
     
  17. Aug 9, 2010 #16

    berkeman

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    Here you go:

    http://en.wikipedia.org/wiki/Theory_of_everything

    Be sure to follow each of the links at the bottom of that page also.
     
  18. Dec 26, 2010 #17
    Is the sun rotation an energy cycle ?
     
  19. Dec 26, 2010 #18

    Vanadium 50

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    Like Russ said:

    Sorry, but vague/ill-formed questions tend not to get a lot of responses because there really isn't anything to respond to. You'll need to ask better questions to get more/better responses.
     
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