The collision will not be elastic, since the relative velocity is faster than sound speed in any relevant material. There will be some small stuff spalled out at excess speeds due to shock waves, but anything big enough to cause the Texas fireball is not going to be accelerated by shocks and remain intact.
Inelastic collisions lose energy (but conserve momentum). So even if you had two pieces smashing together and merging to get a piece with shared momentum and a large plane change to somewhere between the two original orbits, it would then have too little velocity to remain in orbit, and would hit Earth within 45 minutes instead of sticking around for a few days.
A simple orbital analysis using the ground tracks from, e.g. Heavens-Above.com shows that this was not debris form the collision.
The debris from a collision keeps more or less the same orbit as before, but is spread out along the orbit. (Orbital plane changes require a lot more delta-v than changing the along-track position or altitude, since drift along the orbit accumulates, but displacements across the orbit swing back and forth with each cycle.)
Just eyeballing the tracks, the North-going leg of the orbit of Iridium 33 crosses the latitude of Texas at around 10 PM local time. For Cosmos 2251, it crosses about 4 PM local.
An 11 AM fireball could be Iridium debris, but only if it were heading to the south-south-east. The fireball was heading NNE. So this was NOT debris from either satellite.
G is the ratio of gravitational mass to force/acceleration mass. So far, we have always found that this value is constant for all matter. This test is to check whether G is different for, say, atoms where more of the mass is in the form of binding energy, spin, electric field, etc. rather than just the raw protons, neutrons, and electrons.
So, what makes more sense: Spending millions of dollars on aircraft for moving around top military personnel, or spending tens or hundreds of thousands on some pods that can convert any standard-issue cargo plane into a flying office?
Except that if you RTFA, these things cost more than a million dollars each ($7.6M for 7, assuming no further overruns). They spent $68,240 just to change the leather seat upholstery from brown to blue.
If you remember, back in 1969, watching glorious full-color live images of the Neil Armstrong walking on the Moon, then either your memory is wrong, or you were using chemical enhancement to get the color. (Not unusual during the '60's).
The original camera on Apollo 11 was black and white and had 212 x 218 resolution at 10 frames per second. (It could also do 4x the resolution in each dimension at 1.4 frames per second, but that wasn't used for the news broadcasts.)
quick stop working on that cure to cancer, light pollution is SERIOUS, man
LIght pollution causes cancer. Tests have shown it causes cancer in laboratory rats (...but everything causes cancer in laboratory rats). Epidemiological studies have shown that it causes breast cancer in women.
It also has harmful ecological effects, primarily among plants and animals that have mating cycles tied to the phases of the Moon. But also other effects such as insects being eaten by birds that can see them at night (bad for the insects, good for the birds, bad for the bats that no longer have insects to eat because the bats got them.)
An LED at the surface of the eye's cornea/lens will flood the entire retina with light. It will appear as a red glare filling your field of view, and not as a little pixel of light. That is because the surface of the lens is out of focus, and so the wide angle light from the LED just spreads out.
If it were an array of lasers with tight beams, then it could work, but you can't make small lasers produce tight beams(due to the diffraction limit) without additional optics that couldn't fit under the eyelid.
Prison rape is a horrible thing, and references to PMITA prison and the like are in dreadful taste. You shouldn't joke about it unless you are willing to joke about, e.g. cancer.
"Ironically, both spam and resulting sentence saved Ralsky's life, as his cellmate and former customer discovered a polyp, nine inches up."
Unless you think that's funny, please treat treat this problem with the gravity it deserves.
Each of the 71 subjects had one night of practice ('habituation') followed by either a night of real RF then a night of fake RF ('sham'), or vice-versa. Double-blind means that neither the subjects nor the scientists knew which one they were getting at the time.
According to the paper: 'Under the RF exposure condition, participants exhibited a longer latency to deep sleep (stage 3, meanRF=0.37, (SD=0.33), mean- Sham=0.27 hours (SD=0.12); F=9.34, p=0.0037)'. But I don't know how they did their statistics.
Because they had 71 subjects, you get the uncerainty of the mean of each measurement by dividing the SD (standard deviation) by sqrt(71), giving mean latencies and uncertainties thereof of: RF = 0.37 +/- 0.039; sham = 0.27 +/-0.014; delta = 0.10 +/- 0.041; yielding a significance of 2.4 sigma.
2.4 sigma should convince approximately no-one.
This simplistic statistical analysis ignores the fact that the distributions are non-Gaussian (which they definitely are). But as a working scientist, I have learned to never presume that authors did their statistics right. (Not that I have reason to doubt these particular scientists, but averaged over papers P(wrong statistics) is much much greater than the 0.0037 they calculate for their effect.)
On the ad hominen side, this paper was funded by the Mobile Manufacturer's Forum. Therefore, somehow, it must be an evil plot or something, although I don't see how.
After one earthquake knocked all the power out in Los Angeles, 911 was swamped with calls with people asking if the 'strange clouds in the sky' had caused the earthquake.
They were referring to the Milky Way, which most L.A. residents had never seen before.
You only get the brightest ones (mag. 6) with a set-up like that. 8-12" is quite common, and better video cameras than I used are cheap nowadays. A 14" Schmidt-Cass is within the 'serious-amateur' class. The 'insane-amateur' class is 30 inches and up.
Well, since we know that Mars-like conditions are required for intelligent life, the most promising region is Chile's Atacama desert. There are places in this optimal region that can go for centuries without being bombarded by corrosive dihydrogen monoxide falling from the sky, as too often happens on other places on that desolate planet.
It is rather hot, but not far beyond what some extremophiles face here on Mars.
Slashdot Mirror
Your 4-year-old's account shouldn't have administrator access.
If you gave his account administrator access, neither should you.
Unfortinly, Candlejack dosnt prev
The collision will not be elastic, since the relative velocity is faster than sound speed in any relevant material. There will be some small stuff spalled out at excess speeds due to shock waves, but anything big enough to cause the Texas fireball is not going to be accelerated by shocks and remain intact.
Inelastic collisions lose energy (but conserve momentum). So even if you had two pieces smashing together and merging to get a piece with shared momentum and a large plane change to somewhere between the two original orbits, it would then have too little velocity to remain in orbit, and would hit Earth within 45 minutes instead of sticking around for a few days.
(Also posted to Bad Astronomy.)
A simple orbital analysis using the ground tracks from, e.g. Heavens-Above.com shows that this was not debris form the collision.
The debris from a collision keeps more or less the same orbit as before, but is spread out along the orbit. (Orbital plane changes require a lot more delta-v than changing the along-track position or altitude, since drift along the orbit accumulates, but displacements across the orbit swing back and forth with each cycle.)
Looking at the ground tracks of
Iridium 33 and
Cosmos 2251
Just eyeballing the tracks, the North-going leg of the orbit of Iridium 33 crosses the latitude of Texas at around 10 PM local time. For Cosmos 2251, it crosses about 4 PM local.
An 11 AM fireball could be Iridium debris, but only if it were heading to the south-south-east. The fireball was heading NNE. So this was NOT debris from either satellite.
G is the ratio of gravitational mass to force/acceleration mass. So far, we have always found that this value is constant for all matter. This test is to check whether G is different for, say, atoms where more of the mass is in the form of binding energy, spin, electric field, etc. rather than just the raw protons, neutrons, and electrons.
Or, it was two unrelated murders, and they only thought it was a serial killer because the DNA matched.
So, what makes more sense: Spending millions of dollars on aircraft for moving around top military personnel, or spending tens or hundreds of thousands on some pods that can convert any standard-issue cargo plane into a flying office?
Except that if you RTFA, these things cost more than a million dollars each ($7.6M for 7, assuming no further overruns). They spent $68,240 just to change the leather seat upholstery from brown to blue.
In other words, assholes like you commit fraud, so everybody else should just live with it.
Besides, if you are the real Ehrich Weiss, even if your victim got you thrown in jail you would just break out.
It's out of gamut, unless you have an RGBUV monitor.
If you remember, back in 1969, watching glorious full-color live images of the Neil Armstrong walking on the Moon, then either your memory is wrong, or you were using chemical enhancement to get the color. (Not unusual during the '60's).
The original camera on Apollo 11 was black and white and had 212 x 218 resolution at 10 frames per second. (It could also do 4x the resolution in each dimension at 1.4 frames per second, but that wasn't used for the news broadcasts.)
See this description for more details, or rent The Dish.
Does anyone else find it worrisome that our planet's core has obviously been designed so that we roll farther when we hit the fairway?
LIght pollution causes cancer. Tests have shown it causes cancer in laboratory rats (...but everything causes cancer in laboratory rats). Epidemiological studies have shown that it causes breast cancer in women.
It also has harmful ecological effects, primarily among plants and animals that have mating cycles tied to the phases of the Moon. But also other effects such as insects being eaten by birds that can see them at night (bad for the insects, good for the birds, bad for the bats that no longer have insects to eat because the bats got them.)
Both Hu Jintao and Wen Jiabao got rickrolled.
They could be taking DNA samples of five year olds.
An LED at the surface of the eye's cornea/lens will flood the entire retina with light. It will appear as a red glare filling your field of view, and not as a little pixel of light. That is because the surface of the lens is out of focus, and so the wide angle light from the LED just spreads out.
If it were an array of lasers with tight beams, then it could work, but you can't make small lasers produce tight beams(due to the diffraction limit) without additional optics that couldn't fit under the eyelid.
Prison rape is a horrible thing, and references to PMITA prison and the like are in dreadful taste. You shouldn't joke about it unless you are willing to joke about, e.g. cancer.
"Ironically, both spam and resulting sentence saved Ralsky's life, as his cellmate and former customer discovered a polyp, nine inches up."
Unless you think that's funny, please treat treat this problem with the gravity it deserves.
Each of the 71 subjects had one night of practice ('habituation') followed by either a night of real RF then a night of fake RF ('sham'), or vice-versa. Double-blind means that neither the subjects nor the scientists knew which one they were getting at the time.
According to the paper: 'Under the RF exposure condition, participants exhibited a longer latency to deep sleep (stage 3, meanRF=0.37, (SD=0.33), mean- Sham=0.27 hours (SD=0.12); F=9.34, p=0.0037)'. But I don't know how they did their statistics.
Because they had 71 subjects, you get the uncerainty of the mean of each measurement by dividing the SD (standard deviation) by sqrt(71), giving mean latencies and uncertainties thereof of: RF = 0.37 +/- 0.039; sham = 0.27 +/-0.014; delta = 0.10 +/- 0.041; yielding a significance of 2.4 sigma.
2.4 sigma should convince approximately no-one.
This simplistic statistical analysis ignores the fact that the distributions are non-Gaussian (which they definitely are). But as a working scientist, I have learned to never presume that authors did their statistics right. (Not that I have reason to doubt these particular scientists, but averaged over papers P(wrong statistics) is much much greater than the 0.0037 they calculate for their effect.)
On the ad hominen side, this paper was funded by the Mobile Manufacturer's Forum. Therefore, somehow, it must be an evil plot or something, although I don't see how.
All pictures on the internet contain Bruce Schneier's steganographic information.
http://geekz.co.uk/schneierfacts/
He worked with Bester before he became a PsiCop.
They used to be stolen (sorry, 'copyright-infringing') pictures of people in labcoats. Presumably they paid for the pictures after they got caught.
- hypo.html
http://www.boingboing.net/2007/08/antiopenscience
After one earthquake knocked all the power out in Los Angeles, 911 was swamped with calls with people asking if the 'strange clouds in the sky' had caused the earthquake.
They were referring to the Milky Way, which most L.A. residents had never seen before.
ATX: 17.2
mini-ITX: 7.1
nano-ITX: 3.6
pico-ITX : 1.78
In microacres, of course.
The autism-vaccine connection was 'research'
purchased by a law firm for almost a million dollars.
I did it with a 5" telescope and a moderate-sensitivity surveillance camera from an apartment porch overlooking an flood-lit courtyard in the Washington D.C. suburbs.h ittable.html
http://www.spaceweather.com/meteors/leonids/1999/
You only get the brightest ones (mag. 6) with a set-up like that. 8-12" is quite common, and better video cameras than I used are cheap nowadays. A 14" Schmidt-Cass is within the 'serious-amateur' class. The 'insane-amateur' class is 30 inches and up.
Well, since we know that Mars-like conditions are required for intelligent life, the most promising region is Chile's Atacama desert. There are places in this optimal region that can go for centuries without being bombarded by corrosive dihydrogen monoxide falling from the sky, as too often happens on other places on that desolate planet.
It is rather hot, but not far beyond what some extremophiles face here on Mars.
The dry valleys of Antarctica are also promising.