Momemtum is not mass times veloity for velocities approcaching the spead of light. And photons don't have mass. Why are all these posts with incorrect information rated so high?
he interesting thing about/. is how little basic science a lot of the people who think they are qualified to answer your question have. Anyways, here are the answers: 1. I have no idea how long until they try this in space. 2. Yes, by Newton's third law the source is pushed back. As long as that is a planet, you won't care much. 3. a) Think ping-pong balls. When you hit them you can change the direction of motion without changing their speed. That is a transfer of momentum. b) Momentum is mass*velocity. The velocity of light in a vacuum is constant. The mass is dependent on the frequency. So light coming from a gravity well, or from something receeding from us loses energy, and the photon is "red-shifted". c) They would want to avoid absorbing photons since that would burn up the sail very fast. Energy scales as velocity squared, and light moves pretty fast, so it delivers a *lot* of heat for the momentum. About your 3 point, that's not what I learned in my relativity course. momentum is mv/sqrt(1-(v/c)^2), where m is rest mass. Last I knew, photons did not have rest mass. If I remember correctly, energy is sqrt(mc^2 + (0.5mv^2)^2/(1-(v/c)^2)), which is not quadratic.
Chess, however, is unsolvable. The search tree for chess has more nodes than there are atoms of the universe. Good Luck!
Nope, there are about 10^60 nodes for chess, and about 10^80 atoms in the universe. Of course that's still more atoms than in this solar system, this doesn't really help.
The result? When researchers measure the time it takes for the particle to stop existing on one side of the wall and start existing on the other side of the wall, they find that it covers the distance significantly faster than the speed of light. The best recorded time I've heard of was 30c, or 30 times the speed of light.
The probability states of the said particles tend to bulge in such a way that the average positition (or something like that) doesn't violate relativity.
Strange, usually re-compressing increases the size by a maybe 20 bytes because it has to store the file name and date modified and some other shit in a header. Now I've seen a good deal of files that were archived with 3 different compressors, like zip,arj,lzh, it'd be maybe 1% than just zip.
Granted I'm still a wee 2nd-year physics student, but this sounds a little far-fetched to me. I would be most glad to see it become a reality. I recall hearing one experiment in which allegedly a binary version of Mozart's 40th was sent faster than light and was thoroughly impressed, however I've been unable to find any additional information. Is anyone else actually knowledgable in this area?
Yeah, as a student in a 400-level relativity course, I got one word this. Bullshit. Not any more bullshit than those stupid liberal arts courses, but bullshit, nonetheless.
If we send the human to the sun at 2x the speed of light through some kind of tachyeon signal, it will appear to take 4 minutes to us, but from the point of view of the person transported, time will have regressed 4 minutes. (OR something like that)... from what i remember from high school physics.
Sorry, according to special relativity it would take +- 4*sqrt(3)*i minutes from the frame of the person.
About the poor sap reading at 0 to mod them up, ALL moderators should read at -1. Never moderate at any other setting. I think when you have mod points, your screen should defaul to -1, flat mode.
How about -2. There is a post at score -2 in this article, search for it if you don't believe me.
Oh man. I just bought a Palm IIIx a little over a month ago. Does anybody know of a Linux replacement for PalmOS? On a funnier note....check out promo picture http://www.gicom.de/yopy/dsc00359.jpg Nothing like promoting a Linux based PDA, right next to a laptop running MSIE, with the Windows 95 safe logo in the corner;)
If you don't patent it first, someone else will, and sue you into oblivion.
Sounds like a good reason to GET RID OF PATENTS. Seriously, anyone with money can get some lame patent, this unfairly helps the monetary interests of those who already have shitloads of money. Now, if I came up with some amazing non-obvious idea, I wouldn't have the money to patent it, or pay the lawyers to enforce my patent.
He was executed primarily for his belief that the world was not flat, that it was indeed round and that the Earth revolved around the Sun. He also claimed that that the Sun was just a star and that millions of stars have planets about them.
Yeah, the Vatican is a wee bit behind the times. If I'm not mistaken, the current pope finally recognized that the world is round. Maybe organized religion will eventually just die out.
Also, how did the study compensate for time of day? Many teens do not function well until late evening, and some researchers would be mislead to believe that it was sleep-deprivation causing the increased performance, not simple circadian rhythms.
But everyone knows that teens typically don't get up until 6pm.
A 128 bit binary word length greatly simplifies the code for calculating the cross product of two 7-dimensional vectors in a vector space over a field of characteristic 2. This is related to the fact that 128 = 2^7.
However, cross products of 2 vectors are only defined on 3 dimensions, how can you uniquely have something perpendicular to 2 vectors in 7 dimensions?!!
Since at the moment of this writing, the unix time is: 949509356 And the next even time should be: 1000000000 We will have to wait until: time_t p = 1000000000; printf("%s\n",ctime(&p)); Sun Sep 9 03:46:40 2001
How can you call the number of seconds since the beginning of 1970 Unix time? OS/2 uses it too. Someone had to say it. Oh yeah, another thing, that should take into account leap seconds, bah.
Slashdot Mirror
Momemtum is not mass times veloity for velocities approcaching the spead of light. And photons don't have mass. Why are all these posts with incorrect information rated so high?
he interesting thing about /. is how little basic science a lot of the people who think they are qualified to answer your question have. Anyways, here are the answers: 1. I have no idea how long until they try this in space. 2. Yes, by Newton's third law the source is pushed back. As long as that is a planet, you won't care much. 3. a) Think ping-pong balls. When you hit them you can change the direction of motion without changing their speed. That is a transfer of momentum. b) Momentum is mass*velocity. The velocity of light in a vacuum is constant. The mass is dependent on the frequency. So light coming from a gravity well, or from something receeding from us loses energy, and the photon is "red-shifted". c) They would want to avoid absorbing photons since that would burn up the sail very fast. Energy scales as velocity squared, and light moves pretty fast, so it delivers a *lot* of heat for the momentum. About your 3 point, that's not what I learned in my relativity course. momentum is mv/sqrt(1-(v/c)^2), where m is rest mass. Last I knew, photons did not have rest mass. If I remember correctly, energy is sqrt(mc^2 + (0.5mv^2)^2/(1-(v/c)^2)), which is not quadratic.
There are some girls out there that like violent computer games, yeah, who'd want barbie software?
That's a new one, see the irony?
Nope, there are about 10^60 nodes for chess, and about 10^80 atoms in the universe. Of course that's still more atoms than in this solar system, this doesn't really help.
The probability states of the said particles tend to bulge in such a way that the average positition (or something like that) doesn't violate relativity.
Strange, usually re-compressing increases the size by a maybe 20 bytes because it has to store the file name and date modified and some other shit in a header. Now I've seen a good deal of files that were archived with 3 different compressors, like zip,arj,lzh, it'd be maybe 1% than just zip.
Yeah, as a student in a 400-level relativity course, I got one word this. Bullshit. Not any more bullshit than those stupid liberal arts courses, but bullshit, nonetheless.
Sorry, according to special relativity it would take +- 4*sqrt(3)*i minutes from the frame of the person.
IBM has all kinds of neat patents.
:)
Some a bit more disturbing than others.
Well, I think that means that the patent website is now blocked by censorware.
How about -2. There is a post at score -2 in this article, search for it if you don't believe me.
Just wondering, how did this post get rated -2?
Sounds like a good reason to GET RID OF PATENTS. Seriously, anyone with money can get some lame patent, this unfairly helps the monetary interests of those who already have shitloads of money. Now, if I came up with some amazing non-obvious idea, I wouldn't have the money to patent it, or pay the lawyers to enforce my patent.
Yeah, the Vatican is a wee bit behind the times. If I'm not mistaken, the current pope finally recognized that the world is round. Maybe organized religion will eventually just die out.
But everyone knows that teens typically don't get up until 6pm.
However, cross products of 2 vectors are only defined on 3 dimensions, how can you uniquely have something perpendicular to 2 vectors in 7 dimensions?!!
How can you call the number of seconds since the beginning of 1970 Unix time? OS/2 uses it too. Someone had to say it. Oh yeah, another thing, that should take into account leap seconds, bah.
Did anyone try to replace a football team with a beowolf cluster of 11 computers running Linux?