Today is Earth's Rotation Day

Discussion in 'General Discussion' started by bernjb56, Jan 8, 2021.

  1. It's heavy maaannn
     
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  2. You forgot the Gravitational Constant (6.67430×10^−11) ;)
     
  3. Little Nellie

    Little Nellie Supporter

    Not the in Newton’s original equation, added later I believe by someone else. Easier to remember gravity without including it - my excuse anyway :rolleyes:
     
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  4. Isaac would be most upset if he read that...
     
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  5. CollyP

    CollyP Moderator

    Because he'd be 379 and wanting a rest?
     
  6. Pudelwagen

    Pudelwagen Supporter

    Don't bring danglers into this. We don't want Haynes posting selfies again!
     
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  7. Moons

    Moons Supporter

    The angle of dangle is proportionate to the feet of meat.

    Dirk Digglers constant.
     
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  8. Moons

    Moons Supporter

    Reminds my of my favourite poster in Leisure Lakes Mountain bike shop in Nottingham back in the mid 90’s.

    E971DCF2-4437-40B6-B580-2352F02C5A2B.jpeg
     
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  9. CollyP

    CollyP Moderator

    My (rudimentary) physics A level tells me that all objects with a mass attract one another, proportional to their mass.
    Therefore, the earth’s gravity attracts me, as I attract the earth; proportionately.
    We all have a mass and a gravitational pull. Tonight my bottle of Jack Daniels seems to be batting above its mass.
     
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  10. Isaac had lovely hair. If L’Oreal had been around in the 1600s, he would’ve been on their ads, because he’s worth it.
     
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  11. Surely you have used the wrong picture.
    Isn't the world flat?
    I know the gravity of this question but correct illustrations would be helpful
     
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  12. Chrisd

    Chrisd Supporter

    But your ignoring poor old Einstein who had great hair and also explained gravity a little bit!

    Best description I know of his explanation of gravity as bending space rather than a force of attraction is to imagine a sheet of rubber representing space with a heavy weight in the middle. The weight bends the sheet and so objects fall towards the weight. Simples really:confused:

    Alternatively, we could just go with the flow and stick with Terry's version :cool:
    1680x1050_discworld-terry-pratchett-wallpaper-e1367902680361.jpg
     
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  13. What about Gravitational Waves ? and the 2017 Nobel prize for Physics award for discovery of Gravitational Waves, previously predicted by Einstein.
     
  14. Pudelwagen

    Pudelwagen Supporter

    CmZozDQWYAA2SYF.jpg
     
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  15. If you observe couples leaving any McDonalds you will note that principle applies to humans as well.......
     
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  16. It’s a nice image, bit like wind surfing on the solar wind, but he’s surfing backwards away from the beach....
     
  17. mikedjames

    mikedjames Supporter

    Probably was a wig so the lice didnt get a toehold..
     
  18. Pudelwagen

    Pudelwagen Supporter

    It's all relative though. In any case, those gravitational waves are radiating out from the rotating pulsars in the centre.
     
  19. That's what I thought until I saw your cartoon. Gravity attracts, so wouldn't any waves be pulled in towards the pulsars?
     
  20. docjohn

    docjohn Supporter

    I rather like the idea of quantum foams and space-time being, at the scale of 1.6x10^-35 m, discrete points in a lattice. (Don't know how to do superscripts here) Anyway, I can't do the maths but I do understand a bit about stuff looking like a continuum at one length scale and but being discretised at much smaller scales. One of the dinky things about quantum foam is that time can go backwards or stand still at some points as long as that is balanced out elsewhere.
    At the other end of the length scale, what if our universe was just a space-time transient in a foam of universes, a sort of bubble in the jacuzzi of the gods?:eek:
     

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