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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Astronomer
http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2
Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i |
#2
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Astronomer
On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027
wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? It was a reporting mistake, or she misspoke. In another place she was quoted saying it was 7,000 tons: http://www.nature.com/news/russian-m...entury-1.12438 -- Ed Huntress i |
#3
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Astronomer
On Feb 27, 9:03*pm, Ignoramus15027 ignoramus15...@NOSPAM.
15027.invalid wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i I didi a search on her name and found another site that said the weight was 7,000 tons instead of 700,000 tons. http://www.nature.com/news/russian-m...entury-1.12438 So I suspect that CNN got confused by the notation she used , or something like that. My experience with the media is that they are not very accurate. Dan Dan |
#4
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Astronomer
On Feb 27, 9:40*pm, " wrote:
I didi a search on her name and found another site that said the weight was 7,000 tons instead of 700,000 tons. http://www.nature.com/news/russian-m...entury-1.12438 So I suspect that CNN got confused by the notation she used , or something like that. *My experience with the media is that they are not very accurate. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *Dan And checking a third site .......................... http://www.scientificamerican.com/ar...est-in-century has it weighing 40 tons. Dan |
#6
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Astronomer
On 2/27/2013 9:40 PM, wrote:
On Feb 27, 9:03 pm, Ignoramus15027 ignoramus15...@NOSPAM. 15027.invalid wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i I didi a search on her name and found another site that said the weight was 7,000 tons instead of 700,000 tons. http://www.nature.com/news/russian-m...entury-1.12438 So I suspect that CNN got confused by the notation she used , or something like that. My experience with the media is that they are not very accurate. Dan Dan They used the same computer models that they use for global warming. |
#7
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Astronomer
"Tom Gardner" Mars@Tacks wrote in message
... On 2/27/2013 9:40 PM, wrote: So I suspect that CNN got confused by the notation she used , or something like that. My experience with the media is that they are not very accurate. Dan They used the same computer models that they use for global warming. Extra zeros mean nothing to them. |
#8
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Astronomer
Jim Wilkins wrote: "Tom Gardner" Mars@Tacks wrote in message ... On 2/27/2013 9:40 PM, wrote: So I suspect that CNN got confused by the notation she used , or something like that. My experience with the media is that they are not very accurate. Dan They used the same computer models that they use for global warming. Extra zeros mean nothing to them. Only the position of the zeros matter. |
#9
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Astronomer
Michael A. Terrell wrote:
Jim Wilkins wrote: "Tom Gardner" Mars@Tacks wrote in message ... On 2/27/2013 9:40 PM, wrote: So I suspect that CNN got confused by the notation she used , or something like that. My experience with the media is that they are not very accurate. Dan They used the same computer models that they use for global warming. Extra zeros mean nothing to them. Only the position of the zeros matter. Weeeeelllllllll actually it's the position of the decimal point . -- Snag Learning keeps you young ! |
#10
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Astronomer
On 2/28/2013 12:32 PM, Michael A. Terrell wrote:
Jim Wilkins wrote: "Tom Gardner" Mars@Tacks wrote in message ... On 2/27/2013 9:40 PM, wrote: So I suspect that CNN got confused by the notation she used , or something like that. My experience with the media is that they are not very accurate. Dan They used the same computer models that they use for global warming. Extra zeros mean nothing to them. Only the position of the zeros matter. The position of the zeros is in line to vote for Obammy! |
#11
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Astronomer
On Feb 27, 9:40*pm, " wrote:
I contacted Margret and she sent me the following email. From: "Margaret Campbell-Brown" Add sender to Contacts To: "Daniel Caster" I said 7000 tonnes: I've contacted the 40 and 700,000 sites and they've assured me that they've changed the numbers. Margaret Dan |
#12
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Astronomer
On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027
wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i You got it figured out quite well. Gunner The methodology of the left has always been: 1. Lie 2. Repeat the lie as many times as possible 3. Have as many people repeat the lie as often as possible 4. Eventually, the uninformed believe the lie 5. The lie will then be made into some form oflaw 6. Then everyone must conform to the lie |
#13
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Astronomer
"Gunner" wrote in message
... On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027 wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. I just read an estimate that works out to density of around 4, assuming it's a 17m sphere which is ~half (pi/6) the volume of a 17m cube. That suggests it is either a mix of rock and iron, or titanium. jsw |
#14
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Astronomer
On Thu, 28 Feb 2013 08:02:38 -0500, Jim Wilkins wrote:
"Gunner" wrote... On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027 wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. I just read an estimate that works out to density of around 4, assuming it's a 17m sphere which is ~half (pi/6) the volume of a 17m cube. That suggests it is either a mix of rock and iron, or titanium. Articles about fragments from the meteor say the fragments are about 10% iron. "Grokhovsky said the particles were composed of metallic iron as well as chrysolite and sulfite. While another report in the Inquisitr quoting the same official said the rock is made up of €śordinary chondrite.€ť" See [1] (which plays a video that says 10% iron) "Viktor Grokhovsky, who led the expedition from Urals Federal University, said Monday that 53 fragments of the meteor have been plucked from the ice-covered Chebarkul Lake. He said they are less than a centimeter (half an inch) in size, about 10 percent iron, and belong to the chondrite type, the most common variation of meteorites found on Earth." See [2] [1]http://www.ibtimes.com/russian-meteor-shower-2013-scientists-discover-meteor-fragments-chebarkul-lake-1090774 [2]http://www.huffingtonpost.com/2013/02/19/russian-meteor-fragments-chelyabinsk-space-rock_n_2712589.html [3]http://en.wiktionary.org/wiki/chondrule -- jiw |
#15
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Astronomer
On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027
wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i You may be the only one with a cubic meter of gold to weigh :-) -- Cheers, John B. |
#16
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Astronomer
On 2013-02-28, John B wrote:
On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027 wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i You may be the only one with a cubic meter of gold to weigh :-) A cubic meter of gold is worth almost exactly one billion dollars! It would need a powerful 50k forklift to lift. i |
#17
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Astronomer
On Thu, 28 Feb 2013 06:02:21 -0600, Ignoramus27334
wrote: On 2013-02-28, John B wrote: On Wed, 27 Feb 2013 20:03:55 -0600, Ignoramus15027 wrote: http://www.cnn.com/2013/02/27/world/...eor/?hpt=hp_t2 Margaret Campbell-Brown, an astronomer at Canada's University of Western Ontario, says that the Russian meteor was "56 feet (17 meters) across, weighed more than 700,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said." What her saying implies is that, if the meteor was a cube 17x17x17 meters, which is the largest object of 17 meters in size, then its density was 142 tons per cubic meter. For comparison, gold is only 20 tons per cubic meter. Am I the only person to vies these numbers with suspicions? i You may be the only one with a cubic meter of gold to weigh :-) A cubic meter of gold is worth almost exactly one billion dollars! It would need a powerful 50k forklift to lift. I'd reckon that if one had a billion dollars one could afford to buy a forklift to carry it around :-) -- Cheers, John B. |
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