Politics, Religion & Society Topics pertaining to politics, religion, philosophy, and social issues. Not for the faint of heart. Also, do not post while drunk, suffering from food poisoning, or while on a low carb diet. You have been warned. |
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Emergency Mustelid ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2009
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| In special relativity, relativistic mass is the mass of the kinetic energy of the object. It is actual mass. It changes depending on the reference frame and is zero in the reference frame of the object, but that's irrelevant for photons since you can't ever be in the reference frame of the photon and if you could the photon wouldn't exist because its wavelength would be infinite. It also doesn't matter, because so much else changes when you're not in the same reference frame and you can't ignore those complementary changes. For example, when calculating acceleration effects on the object, in your reference frame the result is the same as if the mass was real, due to time dilation. It takes more energy to accelerate a particle from 0.8c to 0.9c than from 0c to 0.1c. Whether you describe that as "accelerating the relativistic mass" or "time dilation" depends on what the purpose of the calculation is. Both interpretations are valid. When accelerating the object, the relativistic mass is exactly the same as the kinetic energy you added to the object. That's how E=Mc^2 was originally derived. As for gravity, when you're dealing with relativistic velocities and masses gravity is not actually a force, it's a description of the shape of space time. Special relativity doesn't really deal with gravity, general relativity does, and my physics chops aren't up to calculating frame dragging (or even really understanding it) and all the other bizarre effects of gravity in relativistic regimes. But for the purpose of a joke about the mass of bitcoins, I think that's getting into overkill territory. Not to mention that we really need to be looking at information theory and computability and the smallest mass-energy equivalent required to hold a bit, and whether space-time is quantized...
__________________ Argent Stonecutter -- Skyhook Station -- Coonspiracy Store "And now I'm going to show you something really cool." ![]() The previous is a cybernetic datum published - in direct contravention of DoD Regulation #229RR3X3 - as being conducive to the physical, psychological and/or social well-being of the population. |
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![]() | #28 (permalink) | |
feral ballerina ![]() ![]() ![]() ![]() ![]()
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| Quote:
![]() Apples and oranges... No. Fizzy water and electron hole migration. | |
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That Bitch ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() *SLU Supporter* ![]() ![]() ![]() ![]() ![]() ![]() ![]()
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My Mood: ![]() SL Join Date: late 04 original account, mid 05 current | my point was that kinetic energy (or kinetic mass if you want to do the conversion) is not the mass of the object (rest mass), which is independent of frame of reference (and is what you use to calculate kinetic energy, from relative velocity, or vice versa)... they are commonly grouped together for calculations of force, but they are separate things
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![]() | #30 (permalink) |
feral ballerina ![]() ![]() ![]() ![]() ![]()
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| The usual method of measuring an unknown small amount of gold is to use a balance, which measures mass. An accurate balance works properly in all practical gravitational fields. The archaism of using a weight measure -- ounces -- for gold is balanced by the casual use of units of mass -- kilograms -- as equivalent to the weight of a thing. Variance in earth's gravitational "constant:" https://en.wikipedia.org/wiki/Gravit...ound_the_world |
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Emergency Mustelid ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2009
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| You want extreme physics? Remember that Red Nova thread, and I made that reference to the Lacerta event in Diaspora? Turns out Greg Egan is coming out with a new book set in a universe with hyperbolic geometry and where it takes infinite energy to turn 90 degrees. Dichronauts — Greg Egan GEEEEEEEK OUT |
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| All I know is, if we move to bitcoin as the currency what am I going to use to scratch off my lotto cards??? ![]()
__________________ Trudeau Classic Sailing Yachts |
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Eternal Newbie ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() *SLU Supporter* ![]() ![]() ![]() ![]()
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...and full marks to Google search - I couldn't recall either title or author, but a Google search for science fiction city on wheels strange geometry brought it up as the second hit. | ||
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Emergency Mustelid ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2009
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| Quote:
Also recommend Karl Schroeder, Peter Watts, and Charlie Stross if you want a bit of science and engineering with your fantastic fiction. | |
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OccupyE9 Sluni-Goon ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
Hail Woz, the great and
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| When I stumble into a physics discussion and have absolutely no idea what is going on I realize maybe it would be good to read the thread from the OP instead. Or at least track down some caffeine.
__________________ "The debug setting for Gender in SL (AvatarSex) is an unsigned 32bit integer value. Not a boolean. I'm still waiting to see what our other options will be. =^-^=" Imnotgoing Sideways "Ok, I have to ask, WTF is this thread even about and why is it hundreds of posts? I am out of vodka so I don't feel like reading it to find out." Cristiano "Why? Don't like me ban me" Cathiee |
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My Mood: ![]() SL Join Date: 21 June 2009 Client: Firestorm | Quote:
Although I personally prefer a bit of imagination and a good sense of adventure - e.g. Pippa Da Costa, Kameron Hurley, Ann Leckie, Veronica Roth etc.. | |
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![]() | #44 (permalink) | |
That Bitch ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() *SLU Supporter* ![]() ![]() ![]() ![]() ![]() ![]() ![]()
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Emergency Mustelid ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2009
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| For a more gonzo look at the future, in a gratis eBook, try Accelerando. |
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![]() | #47 (permalink) |
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My Mood: ![]() SL Join Date: Jun 27, 2006 Client: 7 of them (I like testing) | Money is useful because it saves you from having to barter for everything you want. When it stops performing that function (see Zimbabwe and Venezuela), people resort to barter, or find something else to use as money. The only money you could eat was the occasional culture that used cattle, or medieval peoples who paid in kind, because there was a shortage of silver coinage. |
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![]() | #48 (permalink) |
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My Mood: ![]() | "The only money you could eat ..." But our new money is made of meat ! |
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![]() | #49 (permalink) |
That Bitch ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() *SLU Supporter* ![]() ![]() ![]() ![]() ![]() ![]() ![]()
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My Mood: ![]() SL Join Date: late 04 original account, mid 05 current | True, but pointless... non durable goods make for horrible currency. tools, land, housing, clothing, things that last and have a longer stable lifetime make for much better barter currency. Last edited by Void; 01-16-2017 at 03:39 AM. |
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