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39 Likes

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  1. Hani
    Hani liked post by btr On thread : 2D projectile motion help
    Assume we can neglect air resistance, and that the rock moves in a uniform downwards gravitational field of strength 9.8 m/s2. Proceed in the standard way, as x0x seems about to try, and resolve the...
    Liked On: 10-11-2014, 05:45 AM
  2. Gerry Nightingale
    Gerry Nightingale liked post by btr On thread : What is position?
    JohnMiddlemas - apologies for the late reply, and for the upcoming lengthy post. Not so; logically, points come first and coordinates come later (if at all). Consult a text on topology for...
    Liked On: 08-11-2014, 05:28 AM
  3. Gerry Nightingale
    Gerry Nightingale liked post by btr On thread : What is position?
    The main problem with the above argument is this: you are again trying to treat a point in configuration space (the origin) as though it were a particle, which is a major category error. The...
    Liked On: 08-11-2014, 05:25 AM
  4. Jilan
    Jilan liked post by btr On thread : The Varying Speed of Light
    That's incorrect, I'm afraid (which is quite amusing in light of your tone here). Could you walk us through how you arrived at that answer? I'm actually quite curious; it's almost like you were...
    Liked On: 07-15-2014, 05:29 PM
  5. Markus Hanke
    Markus Hanke liked post by btr On thread : Editing posts
    Thank you, Markus.
    Liked On: 07-11-2014, 07:21 AM
  6. Physicist
    Physicist liked post by btr On thread : The God's eye global gist of general relativity
    I've not yet used the ignore function built into the forum software, but I do sometimes use the one built into my mouse (i.e. the scroll wheel). The main reasons are (a) I can't silence my inner...
    Liked On: 07-05-2014, 01:10 AM
  7. Jilan
    Jilan liked post by btr On thread : The God's eye global gist of general relativity
    I've not yet used the ignore function built into the forum software, but I do sometimes use the one built into my mouse (i.e. the scroll wheel). The main reasons are (a) I can't silence my inner...
    Liked On: 07-04-2014, 10:32 PM
  8. Jilan
    Jilan liked post by btr On thread : Definitions of volt using SI's fundamental magnitude
    One more for your list: the kilogram was originally the mass of 1 litre of water at 4 C.
    Liked On: 07-04-2014, 09:56 PM
  9. Jilan
    Jilan liked post by btr On thread : The Standard Model: where are we now?
    Symmetry breaking is a simple idea at heart. The precise statement would obscure the essential details (and in any case, you can find it online in many places), so I will offer an analogy which sits...
    Liked On: 07-04-2014, 07:39 PM
  10. tk421
    tk421 liked post by btr On thread : Definitions of volt using SI's fundamental magnitude
    Bolding added: As interesting as that is, my question was specifically whether that is now the definition adopted in the S.I. To be sure, I checked with BIPM and NIST, and according to both...
    Liked On: 07-04-2014, 07:00 PM
  11. julian403
    julian403 liked post by btr On thread : Definitions of volt using SI's fundamental magnitude
    Bolding added: As interesting as that is, my question was specifically whether that is now the definition adopted in the S.I. To be sure, I checked with BIPM and NIST, and according to both...
    Liked On: 07-04-2014, 06:49 PM
  12. julian403
    julian403 liked post by btr On thread : Definitions of volt using SI's fundamental magnitude
    Basically yes. 1 V is the potential difference between two points of a conductor when a current of 1 A flowing between those points dissipates 1 W of power.
    Liked On: 07-04-2014, 02:05 AM
  13. Jilan
    Jilan liked post by btr On thread : When the end comes
    Let's just say I'm not in any rush.
    Liked On: 07-03-2014, 08:45 PM
  14. Farsight
    Farsight liked post by btr On thread : Non-inertial clock orbiting an inertial clock: "Do moving clocks always run slowly?"
    Farsight is right, it's not really that complicated, it's just a set-up which creates the illusion of complexity. To begin with, note that when a photon is reflected by an ideal mirror the only...
    Liked On: 07-01-2014, 04:53 PM
  15. Jilan
    Jilan liked post by btr On thread : The God's eye global gist of general relativity
    If I cast my mind back far enough (to post #74), I remember that Jilan wanted to demonstrate the possibility of creating a uniform gravitational field by methods other than accelerating rocket ships....
    Liked On: 06-29-2014, 05:03 PM
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