Facts, Not Fiction

 

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Type: Posts; User: JRM

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    For an object that is not moving to any...

    For an object that is not moving to any significant degree, the indentation doesn't change *much*. But abrupt motion or changes in the mass will cause ripples to propagate outward into space.
    ...
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    Yes. But if you jump on the trampoline, waves...

    Yes. But if you jump on the trampoline, waves will ripple across it.

    Gravity = curvature of spacetime due to a mass

    Gravitational waves = ripples across spacetime due to accelerating masses
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    To be "specific" (i.e. according to the rumors),...

    To be "specific" (i.e. according to the rumors), the event with the strongest signal is the observed merger of two black holes, one 36 times the mass of the sun and one 29 times the mass. They...
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    Why of course! LIGO loves events of sufficient...

    Why of course! LIGO loves events of sufficient gravity.
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    If you had made one, LIGO would have seen it (and...

    If you had made one, LIGO would have seen it (and also announced it on Thursday).

    :cool:
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    Confirmation of Gravitational Waves Imminent

    You thought the LHC and Higgs particle discovery was a big deal.... This Thursday (Feb 11th), the Laser Interferometer Gravitational-Wave Observatory (LIGO) and its collaborators will hold a press...
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    Two projections overlap: one shows what your left...

    Two projections overlap: one shows what your left eye sees, the other shows what your right eye sees. The left lens shows only what your left eye sees (filters out the right image), the right lens...
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    https://en.wikipedia.org/wiki/Polarized_3D_system

    https://en.wikipedia.org/wiki/Polarized_3D_system
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    IMAX is a print format, in the way 70mm and 35mm...

    IMAX is a print format, in the way 70mm and 35mm used to be the choices du jour. In fact, IMAX used to use 70mm film with the frame rotated 90 degrees on the reel.

    The 3D format depends on...
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    My all-time favourite duo was the CBC's Geoff...

    My all-time favourite duo was the CBC's Geoff Gowan and Don Wittman. For Canadian track fans, they were the iconic voices of the sport. And in my opinion, the best race they called was Ben...
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    The winning ticket in Florida was sold at a...

    The winning ticket in Florida was sold at a grocery store in Melbourne Beach where one of my friends shops. She confirmed that it was apparently a group ticket of employees at a local company.
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    Canadians are crossing the border in droves to...

    Canadians are crossing the border in droves to get tickets. They'd be taxed (IRS) only 30% as non-resident aliens, and the Canadian gov't doesn't tax lottery winnings at all.
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    That's my point -- it makes the offense even more...

    That's my point -- it makes the offense even more egregious.
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    It's not a reboot, though, in the modern...

    It's not a reboot, though, in the modern Hollywood sense. It's the next chapter in a saga. It shouldn't really replicate the original in any way.
  15. Thread: LHC

    by JRM
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    Interesting piece. Thanks for sharing. I've...

    Interesting piece. Thanks for sharing. I've been away from the boards for a bit.

    I'm told by my colleagues at the LHC that things are getting interesting. Some of the latest data suggests that...
  16. Thread: Stephen Colbert

    by JRM
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    I must admit: the late night talk show genre was...

    I must admit: the late night talk show genre was washed out of my system in 1990. Is this really a form of entertainment that still captures viewers? I watched Colbert's debut on DVR, and honestly...
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    As usual, you inevitably introduce intangibles...

    As usual, you inevitably introduce intangibles like the above to make your case. What is an "average start"? How do you quantify it? How does it impact his acceleration? What result does this...
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    Who cares what the time is with a 2.0 wind. In...

    Who cares what the time is with a 2.0 wind. In London, Bolt ran 9.87 (-1.2), which is 9.80 basic. In Beijing, he ran 9.79 (-0.5) = 9.76. BOTH effectively high-9.7. Rodgers was only 0.05s behind...
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    I find your continuous name-calling immature and...

    I find your continuous name-calling immature and offensive.
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    Read and heed this. Once again, you come in to...

    Read and heed this. Once again, you come in to an argument with "proof by made-up numbers" (ignoring the opinion of a professional biomechanist in the process, I might add). I will again make this...
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    A much older eye-opener was when France set the...

    A much older eye-opener was when France set the WR of 37.79s in 1990 with no sub-10 runners.
  22. Dafne is only 23 years old and her first year on...

    Dafne is only 23 years old and her first year on the circuit as a dedicated sprinter. Can you imagine how much faster she will get over the next few years.
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    Or he could join the legendary Jamaican bobsled...

    Or he could join the legendary Jamaican bobsled team... Cool Runnings 4, here we come!
  24. Exactly. And thanks for the diagram -- that's...

    Exactly. And thanks for the diagram -- that's pretty detailed.

    As you can see, the lanes off the curve don't actually join the straight until well past the 100m start line (about 14m).
  25. No. On a standard track, the curve+straight...

    No. On a standard track, the curve+straight splits as something like 114m+86m.
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