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Boeing tries to defy gravity
BBC News - Science and Technology ^
| Monday, 29 July, 2002, 03:23 GMT 04:23 UK
| Editorial Staff
Posted on 07/29/2002 2:30:12 PM PDT by vannrox
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To: onedoug
41
posted on
07/29/2002 4:11:54 PM PDT
by
sigSEGV
To: El Gato
Zero times infinity can be pretty much anything. Anything times zero is zero.
42
posted on
07/29/2002 4:13:43 PM PDT
by
Junior
To: Future Snake Eater
When you turn on a lamp, are you instantly crushed? No. Therefore, I think the proper theoretical assumption is that photons have zero mass. but you'd be wrong. They have mass, but only when they are moving! This has been demonstrated by observing the bending of light from stars as it passes nearby the sun. Also by "gravitational lensing" of light from a distant galaxcy passing by a nearer object, usually another galaxcy.
Another brainteaser: What kind of mass would a particle travelling faster than light have? For bonus points, what is the name of this theoretical particle?
Imaginary mass. (Square root of a a negative number). Such particles are called Tachyons, as opposed to normal particles, not includign photons, which are Tardyons.
43
posted on
07/29/2002 4:14:03 PM PDT
by
El Gato
To: yendu bwam
44
posted on
07/29/2002 4:15:56 PM PDT
by
sigSEGV
To: sigSEGV
Hey thanks. I'll be taking a look at it!
Y.B.
To: El Gato
They have mass, but only when they are moving!When does light not move? I'm assuming you're talking about in a lab...Besides, if a particle has mass, then how can it reach c?
To: sigSEGV
Interesting, though dubious. Gravity couples to mass, where weight is realtive to the field. I still suspect electromagnetism...or, the
electro-weak force, if you will.
Thanks for that link.
47
posted on
07/29/2002 4:27:17 PM PDT
by
onedoug
To: Orangedog
The ether doesn't exist per the Michael-Michelob experiments in late 1800's. Then Einstein discovered that even though it [the ether] doesn't exist, it can get distorted like a satin sheet because of slipperiness. parsy.
48
posted on
07/29/2002 4:27:43 PM PDT
by
parsifal
To: vannrox
To: Future Snake Eater
Besides, if a particle has mass, then how can it reach c I suppose since it has zero rest mass, it's instantly accellerated to "c" when it's created. i.e a=F/m, if m is zero then a (accelleration) would be infinite.
Remember at high speeds and small scales, the world doesn't work the same way as it does at everyday speeds and scales, so F=ma is only a low speed approximation anyway.
50
posted on
07/29/2002 4:29:46 PM PDT
by
El Gato
To: stlrocket
What impact is that thing going to have on the environment?
Nothing to see here folks, go back into your caves.
52
posted on
07/29/2002 4:31:36 PM PDT
by
Justa
To: vannrox
time for ego driven belief system defense mode....mid to low levels sound off
53
posted on
07/29/2002 4:33:51 PM PDT
by
galt-jw
To: El Gato
Remember at high speeds and small scales, the world doesn't work the same way as it does at everyday speeds and scales, so F=ma is only a low speed approximation anyway. Good point. Have you ever heard of a book called "The God Particle"? It's written by some Nobel Prize winning physicist, and he gives you a crash course on particle physics and the different particles that modern physicists work with (both in theory and practice). I learned some wild stuff in that one (gluons, anyone?). You should check it out if you like particle physics.
To: LibWhacker
Voodoo physics. Don't be too sure. People once said the same thing about perpetual motion machines.
To: Chewbacca
To: VadeRetro; jennyp; Junior; longshadow; *crevo_list; RadioAstronomer; Scully; Piltdown_Woman; ...
Anti-gravity ping.
To: parsifal
The ether doesn't exist per the Michael-Michelob experiments in late 1800's. Actually, the experiment did not disprove the existence of the æther -- rather it merely rendered the necessity for the substance moot.
58
posted on
07/29/2002 4:41:25 PM PDT
by
Junior
To: vannrox
If Boeing is sucessful, the primary beneficiary will be Red China !
Comment #60 Removed by Moderator
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