Physics - June 2006

I was just think that, if a person was to change the past would they not be preventing their chance to travel in the past in the first place thus not making a change at all in the present. OR if a person did make a change in the past, it would not make a difference because it was that change that brought about the present.

Does that make sense?

2006-06-18 00:59:00 · 13 answers · asked by drtaby13 1

2006-06-18 00:52:39 · 13 answers · asked by ish216 3

We know that light travels in straight lines (gravity and electromagnetic influences excepted). But what makes it travel straight?
Let me expound. A solid mass will (as answered in my previous question) travel in a straight line because the force applied to it pushed it in that direction with reference to the Force vector (direction of force) and in the main will carry on with that direction until the force is expended or a secondary force of some kind alters the resultant vector. We also know that the force and the direction of the force are relative. BUT a photon doesn't seem to follow the same rules as a solid mass. E.g. when the photon has finished it journey, the mass is lost. The speed of a photon is reportedly fixed at C = 1, whereas the speed of a solid mass can be varied in accordance to the force applied to it. Also a solid mass will move within a media (air etc.) a photon doesn't. Photons are released without force vector. How do they know which direction is the shortest?

2006-06-17 23:50:58 · 12 answers · asked by jonstarjon 1

2006-06-17 23:48:48 · 15 answers · asked by seeker 4

2006-06-17 22:37:56 · 12 answers · asked by robert 2110 1

2006-06-17 21:55:35 · 8 answers · asked by bankzi 1

I only wan to know what exactly is eye donation. nO NONSENSE. Its for a projct, please reply as fast as possible, gotta submit my project tomorrow

2006-06-17 21:53:22 · 6 answers · asked by Nam 1

Please answer as soon as possible because I need to collect relevant info as fast as I can to finish my project soon.

2006-06-17 21:31:06 · 19 answers · asked by Mimi 2

2006-06-17 20:30:20 · 4 answers · asked by stupak 1

Light comes from the sun using particles called photons. It would seem that they line up in the form of an electromagnetic wave and propergate across space radially but in straight lines. How do the photons know which way is straight? Why don't they just go off in different directions and disburse?

2006-06-17 20:13:17 · 24 answers · asked by jonstarjon 1

i havent n i've been told that u r really lucky if u'[ve seen one!!

2006-06-17 19:06:31 · 7 answers · asked by confused seeker... 2

are their difficulties cropping up in combining general relativity and quantum theory? like what are the problems arising in the unification of the two theories?

2006-06-17 18:38:24 · 5 answers · asked by ankitd 3

2006-06-17 18:36:09 · 5 answers · asked by UCSteve 5

Also in association with this question any recommnedation where I can find how to calculate from first principles the expectation value of the radial coordinate r in this state??

2006-06-17 17:55:23 · 2 answers · asked by David C 1

2006-06-17 17:52:34 · 1 answers · asked by naina s 1

How long is a Planck length?

2006-06-17 17:35:49 · 6 answers · asked by Anonymous

i need at least 5 thanks!

2006-06-17 16:52:08 · 1 answers · asked by • Moonlight Flower™ • 1

If not, what are they, (besides easy targets for silly answers)?

2006-06-17 16:33:05 · 11 answers · asked by Heavytimes 1

2006-06-17 15:59:37 · 3 answers · asked by shelley 1

Only funny answers, please!

2006-06-17 13:48:43 · 13 answers · asked by Road Trip 3

2006-06-17 12:45:25 · 5 answers · asked by Anonymous

2006-06-17 12:19:32 · 16 answers · asked by doorseeker 1

2006-06-17 12:03:34 · 9 answers · asked by cordless_man 1

2 cogs of opposite size. The larger being used to move the smaller using the same weight as a feather to thrust the larger cog hence moving the smaller cog. The smaller cog has 1 oz of resistance plus the wieght of the cogs( 1g/inch of Aluminum or 5g/in of steel)

2006-06-17 12:03:26 · 3 answers · asked by Hydro2e 1

2006-06-17 11:52:24 · 13 answers · asked by Dominator. 2

2006-06-17 11:21:21 · 4 answers · asked by john g 1

2006-06-17 10:03:53 · 9 answers · asked by Sophie E 1

According to: http://www.woodalls.com/cforum/index.cfm/fuseaction/thread/tid/14872995.cfm
it is supposed to be true that:

Nitrogen is a totally inert gas and does not expand or contract with temperature.
So if your tires were inflated to their proper inflation
pressure at installation, say 100 psi, then they will
be 100 psi at 30 degrees and 100 psi at 115 degrees.
The added bonus with Nitrogen is there is no moisture
in your tires."

2006-06-17 08:51:43 · 7 answers · asked by buythenet 2

“The best data we have [on the big bang] is exactly what I would have predicted had I nothing to go on but…the Bible as a whole.” – Arno Penzias, Nobel Prize winning co-discoverer of background radiation

If you read Genesis, it states the exact order things would have had to occur in the process of the Big Bang. It's funny that an author got it right 7,00 years ago.

The problem is that entropy and the state of order rely on chance. Chance alone is not enought to produce complex organisms. But is it plausible that chance was not a forcless entity? Is it possible the order that existed an a magnitude much greater than we know it in our universe today could have began with a touch of force from a higher intelligence?Could creationism and the Big Bang theory exist together, imporving the likelyhood of a creator?

2006-06-17 08:41:29 · 13 answers · asked by Rockstar 6

...and there's no one around to hear it does it still make a sound?

2006-06-17 08:41:25 · 8 answers · asked by spiffytwirler 1