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Speed of light may have changed recently
New Scientist ^ | 6/30/04 | Eugenie Samuel Reich

Posted on 06/30/2004 1:35:28 PM PDT by NukeMan

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To: NukeMan

The Top 20 Cool Things About a Car that Goes Faster than the Speed of Light


20 Sleep 'til noon. Still get to work by 8:00am!

19 Doppler shift makes red traffic lights look green.

18 Breaking laws of physics only a misdemeanor in most states.

17 Never in car long enough to hear an entire Madonna song.

16 Carl Sagan and Stephen Hawking keep bugging you to carpool.

15 No one can see you pick your nose while you drive.

14 Lunch breaks in Paris, circa 1792.

13 LA to Vegas in 2 nanoseconds.

12 You can stop worrying about being sucked into a black hole driving home from work.

11 You'll be so thin while driving it you can even wear horizontal stripes.

10 That deer in your headlights is actually behind you.

9 Kid from Mentos commercial almost guaranteed to lose a limb if he tries to duck through back seat.

8 Traffic enforcement limited to cops with PhD's in Quantum Physics.

7 Bugs never see you comin'.

6 You can get to the good hookers before Charlie Sheen.

5 Can make a fortune delivering pizza with the slogan "It's there before you order or it's free!"

4 Car makes it from Hollywood to London fast enough to not arouse suspicions of Elizabeth Hurley.

3 License plate: "Me=mc2"

2 Cigarette butts don't land in the backseat -- they land in last week!

and the Number 1 Cool Thing About a Car that Goes Faster than the Speed of Light...

1. drive-by shooting stars


http://hagen.let.rug.nl/peterm/jokes/joke40.htm


61 posted on 06/30/2004 2:02:14 PM PDT by nuconvert ( "Let Freedom Reign !" ) ( Azadi baraye Iran)
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To: NukeMan

This is really posted at 5:02:30.


62 posted on 06/30/2004 2:02:20 PM PDT by LurkedLongEnough (Bush '04 --- in a F'n landslide.)
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To: VadeRetro

Two billion years ago ... wasn't that when we switched to Universal Savings Time? In order to conserve energy, if memory serves.


63 posted on 06/30/2004 2:02:22 PM PDT by PatrickHenry (Felix, qui potuit rerum cognoscere causas.)
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To: Dahoser

Keep thinking she is my stepdaughter, at least that is what I tell the neighbors. They are beginning to wonder how I came up with a new stepdaughter without getting married.


PS: Keep this to yourself.


64 posted on 06/30/2004 2:02:35 PM PDT by U S Army EOD (John Kerry, the mother of all flip floppers.)
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To: NukeMan
And in March, Flambaum claimed that the ratio of different elements left over from just after the big bang suggests that alpha(s) must have been different then compared with its value today (Physical Review D, vol 69, p 063506).

Assuming, of course, a big bang to begin with.
65 posted on 06/30/2004 2:03:21 PM PDT by aruanan
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To: <1/1,000,000th%
And didn't Einstein originally just assume the speed of light as a constant?

I think he deduced it as a consequence of Maxwell's equations. That's where he got the symbol "c" from, I'm told. But as always, I'll yield to the experts, who often correct my babblings.

66 posted on 06/30/2004 2:04:36 PM PDT by PatrickHenry (Felix, qui potuit rerum cognoscere causas.)
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To: NukeMan
299,792,458 m/s -- it's not just a good idea... it's the law!
67 posted on 06/30/2004 2:05:13 PM PDT by kevkrom (Reagan lives on... as long as we stay true to his legacy)
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To: Cap Huff

Faster? No, they are SLOWER. At least in my kitchen. I'll check the bathroom tonight.


68 posted on 06/30/2004 2:05:17 PM PDT by Blood of Tyrants (Even if the government took all your earnings, you wouldn't be, in its eyes, a slave.)
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To: Blood of Tyrants

I first notice it with the refrigerator light.


69 posted on 06/30/2004 2:07:28 PM PDT by Cap Huff
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To: PatrickHenry

"A varying speed of light contradicts Einstein's theory of relativity, and would undermine much of traditional physics." I'm no physicist, but that assertion seems a stretch because if the 'constant is sliding upward, the relative 'whole-universe' relationship would be the same at any given temporal point. Am I confused or what?


70 posted on 06/30/2004 2:07:48 PM PDT by MHGinTN (If you can read this, you've had life support from someone. Promote life support for others.)
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To: VRWCmember
I can see it already:

No laws of physics changed when Clinton lied


71 posted on 06/30/2004 2:08:16 PM PDT by Dilbert56
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To: PatrickHenry
Two billion years ago ... wasn't that when we switched to Universal Savings Time? In order to conserve energy, if memory serves.

I wasn't around then. You're the expert.

72 posted on 06/30/2004 2:08:20 PM PDT by VadeRetro
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To: NukeMan
According to CNN, it dropped quite a bit very recently...


73 posted on 06/30/2004 2:08:36 PM PDT by mikrofon (RIP, Columbia)
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To: Cap Huff

Faster or slower in the fridge? Inquiring minds want to know!


74 posted on 06/30/2004 2:10:31 PM PDT by Blood of Tyrants (Even if the government took all your earnings, you wouldn't be, in its eyes, a slave.)
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To: MHGinTN
A varying speed of light contradicts Einstein's theory of relativity

The Theory is okay. If the speed of light is not constant, and of course it isn't at all, results may lie outside the Theory rather than contradict it.

75 posted on 06/30/2004 2:10:59 PM PDT by RightWhale (Destroy the dark; restore the light)
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To: MHGinTN
Am I confused or what?

Probably. But so am I. If the speed of light is variable, I'll need to rethink just about everything.

76 posted on 06/30/2004 2:12:21 PM PDT by PatrickHenry (Felix, qui potuit rerum cognoscere causas.)
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To: U S Army EOD

I know nothingk...nothingk!


77 posted on 06/30/2004 2:12:30 PM PDT by Dahoser (9/11---The Legacy of Clinton treating terrorism as a law enforcement issue. Kerry's plan, too.)
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To: NukeMan

This happens every time I get a new set of tires for my truck.


78 posted on 06/30/2004 2:13:24 PM PDT by azhenfud ("He who is always looking up seldom finds others' lost change...")
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To: NukeMan

Too bad Mallomar season just ended !


Finding the Speed of Light with
Marshmallows-A Take-Home Lab

Robert H. Stauffer, Jr., Cimarron-Memorial High School, Las Vegas, Nevada, USA

I have heard that at 16 years old, Albert Einstein constantly wondered what it would be like to ride on a beam of light. Students in physics always seem to be fascinated by the properties of light. However, speed-of-light demonstrations often require extensive preparation or expensive equipment. I have prepared a simple classroom demonstration that the students can also use as a take-home lab.

The activity requires a microwave oven, a microwave-safe casserole dish, a bag of marshmallows, and a ruler. (The oven must be of the type that has no mechanical motion-no turntable or rotating mirror. If there is a turn-table, remove it first.) First, open the marshmallows and place them in the casserole dish, completely covering it with a layer one marshmallow thick. Next, put the dish of marshmallows in the microwave and cook on low heat. Microwaves do not cook evenly and the marshmallows will begin to melt at the hottest spots in the microwave. (I leaned this from our Food Science teacher Anita Cornwall.) Heat the marshmallows until they begin to melt in four or five different spots. Remove the dish from the microwave and observe the melted spots. Take the ruler and measure the distance between the melted spots. You will find that one distance repeats over and over. This distance will correspond to half the wavelength of the microwave, about 6 cm. Now turn the oven around and look for a small sign that gives you the frequency of the microwave. Most commercial microwaves operate at 2450 MHz.

All you do now is multiply the frequency by the wavelength. The product is the speed of light.

Example:

Velocity = Frequency ´ Wavelength

Velocity = 2450 MHz ´ 0.122 m

Velocity = 2.99 ´ 108 m/s

This works in my physics class, often with less than 5% error. Then the students can eat the marshmallows.

(Reprinted with permission from The Physics Teacher, vol. 35, April 1997, p. 231. Copyright 1997 American Association of Physics Teachers )


79 posted on 06/30/2004 2:13:47 PM PDT by COUNTrecount
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To: NukeMan
I wonder what effect, if any, that this has on the dark energy and expansion acceleration/ Big Rip theories.
80 posted on 06/30/2004 2:14:18 PM PDT by Laurence of the Rats (Eternal Hate To Rome)
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