Cygnia Posted November 15, 2018 Report Share Posted November 15, 2018 [BLEEP] This is a local case where I am. https://www.cleveland.com/news/2018/11/clevelandcom-reporter-nikki-delamottes-uncle-fatally-shot-her-before-killing-himself-authorities-say.html Pariah 1 Link to comment Share on other sites More sharing options...
Duke Bushido Posted November 15, 2018 Report Share Posted November 15, 2018 It makes a whole lot more sense to me--and is just as unlikely as anything else--to just all get together, throw some sand on a bucket, and declare that to be the new thing. I mean, as long as we're going to continue on with an infinite upscaling, then _any_ stopping point is arbitrary. Link to comment Share on other sites More sharing options...
Pattern Ghost Posted November 15, 2018 Report Share Posted November 15, 2018 8 hours ago, Cancer said: The only units I have no intuitive feel for are the land area ones ... acre and hectare are both meaningless to me An acre is easy to picture. Just picture a rectangle that's one chain by one furlong. Old Man 1 Link to comment Share on other sites More sharing options...
Christopher Posted November 15, 2018 Report Share Posted November 15, 2018 3 hours ago, Duke Bushido said: "It was the meter that was the first to be pegged to a constant. In 1960, it was measured using the wavelength of light, and then, in 1983, at the BIPM’s 17th convention (this week’s will be its 26th), it was given its current definition as “the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second." I understand completely. I mean, why would anyone remain on the old "five-thousand, two-hundred and eighty feet in a mile; sixteen ounces in a pound, four quarts in a gallon nonsense" when the metric system breaks up into much more practical and useful numbers like this? "needs to be keep it 3 layers of vacuum when not in use" is not my definition of practical. Neither is the previous one for meter: " So, the kilogram was originally defined as the mass of a cubic decimeter of water (a decimeter being a tenth of a meter)[aka one liter], while the meter itself was calculated as a fraction of the distance between the North Pole and the Equator. A section of this imaginary line running through Europe was measured painstakingly by hand, inch by inch, in a seven-year journey across the continent. And, in 1798, the meter was officially redefined as 1/10,000,000th of half the Earth’s meridian. If any country needed to create their own meter standard, they could, theoretically measure it themselves. " The countries reference weights is where "practicality" comes in. 2 hours ago, dmjalund said: we don;t want to hange our distance measurement on the speed of light too tightly, just in case it turns out not to be a constant The speed of light is pretty constant in a vacuum. The only question is if something can move faster then light. And well, it beats calculating the pythagorean distance between equator and northpole. A measure that will change due to low level stuff like tectonic plates moving. Link to comment Share on other sites More sharing options...
Cancer Posted November 15, 2018 Report Share Posted November 15, 2018 2 minutes ago, Christopher said: The speed of light is pretty constant in a vacuum. The only question is if something can move faster then light. And well, it beats calculating the pythagorean distance between equator and northpole. A measure that will change due to low level stuff like tectonic plates moving. That was an issue early on, as Michaelson's initial working light path was between mountaintops in southern California, whose linear separation did in fact change over time, which made measures twenty years apart in time disagree with each other by many, many sigma. Sociotard 1 Link to comment Share on other sites More sharing options...
Badger Posted November 15, 2018 Report Share Posted November 15, 2018 7 hours ago, Duke Bushido said: "It was the meter that was the first to be pegged to a constant. In 1960, it was measured using the wavelength of light, and then, in 1983, at the BIPM’s 17th convention (this week’s will be its 26th), it was given its current definition as “the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second." I understand completely. I mean, why would anyone remain on the old "five-thousand, two-hundred and eighty feet in a mile; sixteen ounces in a pound, four quarts in a gallon nonsense" when the metric system breaks up into much more practical and useful numbers like this? Well, gallon isn't too impractical, as it is consistently a doubling (cup to pint to quart to half-gallon to gallon) SO, are they changing because light slowed down or not? Link to comment Share on other sites More sharing options...
Starlord Posted November 15, 2018 Report Share Posted November 15, 2018 When light slows down to zero, is that the speed of dark? PS: if you're driving at the speed of light and turn on your headlights, what happens? Link to comment Share on other sites More sharing options...
Hermit Posted November 15, 2018 Report Share Posted November 15, 2018 On 11/14/2018 at 3:50 AM, Bazza said: Sounds like you want to join the metric system... Like Ternaugh said, they tried. I remember in the 70s when the UK was making the transition (IIRC) and early 80s every teacher there was telling us how we needed to learn this because, by gum, it was happening. It did happen, but mostly on the corporate level because.. yknow, trade = money and that's what they're about. For much of the public, a lot of us grunted, and like a first year language that wasn't used often enough, forgot the majority of it. This article is pretty interesting on the state of Metric in America (at least of 2014) http://www.whatitmeanstobeamerican.org/ideas/why-wont-america-go-metric/ There's an interesting point/opinion in the last lines of the article "That ours is a dual-measurement country is part of our great diversity. We are the only republic on earth that predates the metric system, and that’s a major reason why we never fully joined the party." Link to comment Share on other sites More sharing options...
Cygnia Posted November 15, 2018 Report Share Posted November 15, 2018 First Major Rain in Centuries Triggers Wave of Death in Earth's Driest Desert Link to comment Share on other sites More sharing options...
Cancer Posted November 15, 2018 Report Share Posted November 15, 2018 2 hours ago, Starlord said: When light slows down to zero, is that the speed of dark? PS: if you're driving at the speed of light and turn on your headlights, what happens? You turn into a pumpkin, and the cosmic ghost rats drag you away and nibble you to nothingness as you scream out your agonies for the rest of eternity. Don't mess with relativity. Link to comment Share on other sites More sharing options...
Old Man Posted November 15, 2018 Report Share Posted November 15, 2018 4 hours ago, Starlord said: When light slows down to zero, is that the speed of dark? PS: if you're driving at the speed of light and turn on your headlights, what happens? It depends. Probably nothing unusual, but if you're behind me and you turn on your high beams, then you're going to die. Link to comment Share on other sites More sharing options...
Cygnia Posted November 15, 2018 Report Share Posted November 15, 2018 Link to comment Share on other sites More sharing options...
Pattern Ghost Posted November 15, 2018 Report Share Posted November 15, 2018 5 hours ago, Starlord said: When light slows down to zero, is that the speed of dark? PS: if you're driving at the speed of light and turn on your headlights, what happens? It's all relative. Link to comment Share on other sites More sharing options...
Cancer Posted November 15, 2018 Report Share Posted November 15, 2018 It's like incest that way. That's why you can't do that. Link to comment Share on other sites More sharing options...
Sociotard Posted November 15, 2018 Report Share Posted November 15, 2018 So that's why Einstein wound up with his cousin. Link to comment Share on other sites More sharing options...
assault Posted November 16, 2018 Report Share Posted November 16, 2018 8 hours ago, Hermit said: There's an interesting point/opinion in the last lines of the article"That ours is a dual-measurement country is part of our great diversity. We are the only republic on earth that predates the metric system, and that’s a major reason why we never fully joined the party." The Most Serene Republic of San Marino begs to differ. Link to comment Share on other sites More sharing options...
Bazza Posted November 16, 2018 Report Share Posted November 16, 2018 7 hours ago, Cancer said: You turn into a pumpkin, and the cosmic ghost rats drag you away and nibble you to nothingness as you scream out your agonies for the rest of eternity. Don't mess with relativity. Also: don't mess with eternity. Link to comment Share on other sites More sharing options...
Bazza Posted November 16, 2018 Report Share Posted November 16, 2018 5 hours ago, Cygnia said: Love this song. Link to comment Share on other sites More sharing options...
Bazza Posted November 16, 2018 Report Share Posted November 16, 2018 5 hours ago, Pattern Ghost said: It's all relative. Everything is in flux. Link to comment Share on other sites More sharing options...
Badger Posted November 16, 2018 Report Share Posted November 16, 2018 11 hours ago, Starlord said: When light slows down to zero, is that the speed of dark? PS: if you're driving at the speed of light and turn on your headlights, what happens? For the latter you'll see what you just passed, I guess. Link to comment Share on other sites More sharing options...
Badger Posted November 16, 2018 Report Share Posted November 16, 2018 6 hours ago, Old Man said: It depends. Probably nothing unusual, but if you're behind me and you turn on your high beams, then you're going to die. If you are behind me at night, apparently turning on the high beams is apparently a requirement. Either that or everyone has really bright-@$$ low beams. Link to comment Share on other sites More sharing options...
Badger Posted November 16, 2018 Report Share Posted November 16, 2018 1 hour ago, Bazza said: Also: don't mess with eternity. Is that a long time? What happens when eternity ends? Link to comment Share on other sites More sharing options...
Cancer Posted November 16, 2018 Report Share Posted November 16, 2018 It goes negative and you back around from the other way. Link to comment Share on other sites More sharing options...
tkdguy Posted November 16, 2018 Author Report Share Posted November 16, 2018 How six women are leading the charge for clean water BoloOfEarth 1 Link to comment Share on other sites More sharing options...
Christopher Posted November 16, 2018 Report Share Posted November 16, 2018 13 hours ago, Starlord said: PS: if you're driving at the speed of light and turn on your headlights, what happens? 10 hours ago, Cancer said: You turn into a pumpkin, and the cosmic ghost rats drag you away and nibble you to nothingness as you scream out your agonies for the rest of eternity. Don't mess with relativity. 8 hours ago, Old Man said: It depends. Probably nothing unusual, but if you're behind me and you turn on your high beams, then you're going to die. 2 hours ago, Badger said: For the latter you'll see what you just passed, I guess. I think I can answer that scientifiically speaking. But we must differentiate between how you got to that speed to begin with. Newtonian Acceleration: Your headlights would heat up. Photons that were shoot precisely* along your path would propably stay there, just a Plank-unit away from your lights. All others would be scooped up. And as Photons are energy, this should impart some heating effect. I am uncertain if their wavelenght (and thus energy content) would be affected by the relative axis. If it does, that might break Energy Conservation. And according to Hawking, even Black Holes conform to that rule. *Now that I think about it, I am not so certain about those either. The uncertainty principle - as shown by the dual slit experiment - may cause them to interfere with themself, veering them "off course". So they would also be scooped up again. Plus following ones might interfer as normal with waves that collide. Other FTL: Within your FTL effect field, light would travel normally. The edge of your FTL effect would become the "outside" of your lamps. Link to comment Share on other sites More sharing options...
Recommended Posts