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RE: The useless bits of info see if we can make a million posts thread - BUSGO - 26-11-2008

Tell us something we don't know casserole.Confused


(thanks for the reminders)Pi_tongue

Lol3

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

Dark energy

IT IS one of the most famous, and most embarrassing, problems in physics. In 1998, astronomers discovered that the universe is expanding at ever faster speeds. It's an effect still searching for a cause - until then, everyone thought the universe's expansion was slowing down after the big bang. "Theorists are still floundering around, looking for a sensible explanation," says cosmologist Katherine Freese of the University of Michigan, Ann Arbor. "We're all hoping that upcoming observations of supernovae, of clusters of galaxies and so on will give us more clues."

One suggestion is that some property of empty space is responsible - cosmologists call it dark energy. But all attempts to pin it down have fallen woefully short. It's also possible that Einstein's theory of general relativity may need to be tweaked when applied to the very largest scales of the universe. "The field is still wide open," Freese says.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

The Kuiper cliff

IF YOU travel out to the far edge of the solar system, into the frigid wastes beyond Pluto, you'll see something strange. Suddenly, after passing through the Kuiper belt, a region of space teeming with icy rocks, there's nothing.

Astronomers call this boundary the Kuiper cliff, because the density of space rocks drops off so steeply. What caused it? The only answer seems to be a 10th planet. We're not talking about Quaoar or Sedna: this is a massive object, as big as Earth or Mars, that has swept the area clean of debris.

The evidence for the existence of "Planet X" is compelling, says Alan Stern, an astronomer at the Southwest Research Institute in Boulder, Colorado. But although calculations show that such a body could account for the Kuiper cliff (Icarus, vol 160, p 32), no one has ever seen this fabled 10th planet.

There's a good reason for that. The Kuiper belt is just too far away for us to get a decent view. We need to get out there and have a look before we can say anything about the region. And that won't be possible for another decade, at least. NASA's New Horizons probe, which will head out to Pluto and the Kuiper belt, is scheduled for launch in January 2006. It won't reach Pluto until 2015, so if you are looking for an explanation of the vast, empty gulf of the Kuiper cliff, watch this space.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

The Wow signal

IT WAS 37 seconds long and came from outer space. On 15 August 1977 it caused astronomer Jerry Ehman, then of Ohio State University in Columbus, to scrawl "Wow!" on the printout from Big Ear, Ohio State's radio telescope in Delaware. And 28 years later no one knows what created the signal. "I am still waiting for a definitive explanation that makes sense," Ehman says.

Coming from the direction of Sagittarius, the pulse of radiation was confined to a narrow range of radio frequencies around 1420 megahertz. This frequency is in a part of the radio spectrum in which all transmissions are prohibited by international agreement. Natural sources of radiation, such as the thermal emissions from planets, usually cover a much broader sweep of frequencies. So what caused it?

The nearest star in that direction is 220 light years away. If that is where is came from, it would have had to be a pretty powerful astronomical event - or an advanced alien civilisation using an astonishingly large and powerful transmitter.

The fact that hundreds of sweeps over the same patch of sky have found nothing like the Wow signal doesn't mean it's not aliens. When you consider the fact that the Big Ear telescope covers only one-millionth of the sky at any time, and an alien transmitter would also likely beam out over the same fraction of sky, the chances of spotting the signal again are remote, to say the least.

Others think there must be a mundane explanation. Dan Wertheimer, chief scientist for the SETI@home project, says the Wow signal was almost certainly pollution: radio-frequency interference from Earth-based transmissions. "We've seen many signals like this, and these sorts of signals have always turned out to be interference," he says. The debate continues.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

Not-so-constant constants

IN 1997 astronomer John Webb and his team at the University of New South Wales in Sydney analysed the light reaching Earth from distant quasars. On its 12-billion-year journey, the light had passed through interstellar clouds of metals such as iron, nickel and chromium, and the researchers found these atoms had absorbed some of the photons of quasar light - but not the ones they were expecting.

If the observations are correct, the only vaguely reasonable explanation is that a constant of physics called the fine structure constant, or alpha, had a different value at the time the light passed through the clouds.

But that's heresy. Alpha is an extremely important constant that determines how light interacts with matter - and it shouldn't be able to change. Its value depends on, among other things, the charge on the electron, the speed of light and Planck's constant. Could one of these really have changed?

No one in physics wanted to believe the measurements. Webb and his team have been trying for years to find an error in their results. But so far they have failed.

Webb's are not the only results that suggest something is missing from our understanding of alpha. A recent analysis of the only known natural nuclear reactor, which was active nearly 2 billion years ago at what is now Oklo in Gabon, also suggests something about light's interaction with matter has changed.

The ratio of certain radioactive isotopes produced within such a reactor depends on alpha, and so looking at the fission products left behind in the ground at Oklo provides a way to work out the value of the constant at the time of their formation. Using this method, Steve Lamoreaux and his colleagues at the Los Alamos National Laboratory in New Mexico suggest that alpha may have decreased by more than 4 per cent since Oklo started up (Physical Review D, vol 69, p 121701).

There are gainsayers who still dispute any change in alpha. Patrick Petitjean, an astronomer at the Institute of Astrophysics in Paris, led a team that analysed quasar light picked up by the Very Large Telescope (VLT) in Chile and found no evidence that alpha has changed. But Webb, who is now looking at the VLT measurements, says that they require a more complex analysis than Petitjean's team has carried out. Webb's group is working on that now, and may be in a position to declare the anomaly resolved - or not - later this year.

"It's difficult to say how long it's going to take," says team member Michael Murphy of the University of Cambridge. "The more we look at these new data, the more difficulties we see." But whatever the answer, the work will still be valuable. An analysis of the way light passes through distant molecular clouds will reveal more about how the elements were produced early in the universe's history.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

Cold fusion

AFTER 16 years, it's back. In fact, cold fusion never really went away. Over a 10-year period from 1989, US navy labs ran more than 200 experiments to investigate whether nuclear reactions generating more energy than they consume - supposedly only possible inside stars - can occur at room temperature. Numerous researchers have since pronounced themselves believers.

With controllable cold fusion, many of the world's energy problems would melt away: no wonder the US Department of Energy is interested. In December, after a lengthy review of the evidence, it said it was open to receiving proposals for new cold fusion experiments.

That's quite a turnaround. The DoE's first report on the subject, published 15 years ago, concluded that the original cold fusion results, produced by Martin Fleischmann and Stanley Pons of the University of Utah and unveiled at a press conference in 1989, were impossible to reproduce, and thus probably false.

The basic claim of cold fusion is that dunking palladium electrodes into heavy water - in which oxygen is combined with the hydrogen isotope deuterium - can release a large amount of energy. Placing a voltage across the electrodes supposedly allows deuterium nuclei to move into palladium's molecular lattice, enabling them to overcome their natural repulsion and fuse together, releasing a blast of energy. The snag is that fusion at room temperature is deemed impossible by every accepted scientific theory.

Cold fusion would make the world's energy problems melt away. No wonder the Department of Energy is interested
That doesn't matter, according to David Nagel, an engineer at George Washington University in Washington DC. Superconductors took 40 years to explain, he points out, so there's no reason to dismiss cold fusion. "The experimental case is bulletproof," he says. "You can't make it go away."

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

32 Things You Can Do with Beer
We always suspected it was the greatest substance ever invented. Now we have proof

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

BATHE IN IT
Instead of sipping a beer, try soaking in it. Pour a bottle of German Badebier in the tub and lie back for a real bubble bath.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

PUT OUT A FIRE
Although certainly not as effective as a real fire extinguisher, a can or bottle of beer can mimic one if none is available. Simply shake and spritz. After all, beer is mostly water. This works on small grill flare-ups, and some people have been known to carry an emergency can in their car in case of engine fire.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

MARINATE MEAT
Beer is slightly acidic -- and that makes it an excellent meat tenderizer, says Linda Omichinski, R.D., a nutritionist. This allows you to enjoy leaner cuts that otherwise might be too tough. Beer also won't alter the meat's flavor as much as wine- and vinegar-based marinades do. Poke a few holes in the meat, put it in a Tupperware container (we know you have them) or a large resealable bag, and add beer. (English ale is great for beef.) Marinate in the refrigerator for a few hours or, better yet, overnight. Do not drink the marinade.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

POLISH POTS
In days of yore, the last bit of beer from spent kegs was collected and used to polish the copper vats in breweries. Greg Smith, general manager of the Idaho Brewing Company, is keeping the tradition alive by using beer to put a shine on the copper-top tables in his Idaho Falls establishment. "Because of its acidity," he explains, "you can just pour some on, let it sit for a while, then wipe it off. It also works well on Revere Ware pots."

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

MAKE BEER BARBECUE SAUCE
Ingredients:

1 medium Spanish onion, diced

1 medium banana pepper, diced

3 cloves garlic, minced

2 Tbsp capers

5 ripe tomatoes, diced

1 small can tomato paste

1/3 c each wine vinegar, olive oil, soy sauce, brown sugar

1 Tbsp balsamic vinegar

2 Tbsp each Worcestershire sauce, Tabasco, honey, Dijon mustard, horseradish, oregano

2 Tbsp fresh ground pepper

1 tsp cumin

Dash of ground clove

12 ounces amber ale or porter

Combine all ingredients in a large saucepan and boil for 10 minutes. Lower heat and simmer about 4 hours until thickened. Cool and refrigerate for 24 hours so the flavors can meld. Then baste everything but the dog with it.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

SHAMPOO HAIR
Not only is beer the remedy for a dull party, it's also the cure for dull hair. Dump a cup into a small saucepan and bring it to a boil over medium heat. Let it reduce until there's 1/4 cup left. This removes the alcohol, which can dry hair. Let the beer cool, then mix it with a cup of your favorite shampoo. Pour it into an empty shampoo bottle, then wash and rinse as usual. It'll give your hair more shine and luster.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

LOOSEN RUSTY BOLTS
Pour some beer on them and wait a few minutes. The carbonation may help break up the rust.

RE: The useless bits of info see if we can make a million posts thread - cAstAgeAr - 26-11-2008

CLEAR UP BROWN SPOTS IN YOUR LAWN
According to Andrew Lopez, a professional gardener, the fermented sugars in beer stimulate plant growth and kill fungi. He recommends spraying either home brew or Rolling Rock (both are chemical-free) on those annoying brown spots in your lawn. (Either that, or just stop peeing there.) "The grass will absorb the sugar in the beer and draw energy from it," Lopez explains.