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#41
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David |
#42
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Comment: Statemen: "Every gallon of gasoline saved keeps 20 pounds of COČ
out of the atmosphere." How is this even possible? A gallon of gas doesn't weigh 20 pounds. |
#43
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http://www.fueleconomy.gov/feg/co2.shtml |
#44
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The probability approaches 0, but it never reaches 0.
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#45
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Besides, my point was a QM one. There is a mathematical probability, not equal to zero (but really close) that you can walk up to a wall and simply "pop" out the other side. There are actual devices that use this QM principle. One of them is the tunneling electron microscope. Last edited by Doug4.7; 08 March 2007 at 05:46 PM. Reason: add cite |
#46
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Comment: In The Lottery, you stated that the odds of having 9-1-1 come up as the
winning number were 1 in 1000. I am not a statistician but I believe that your calculations would be correct if there were only 10 balls each having a digit from 0 to 9 on it. However, when there is a chance of obtaining a number more than once I believe that would greatly increase the odds. |
#47
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and I learned that in high school statistics... nor am i a statistician (closest I come is a PnP RPGer...) |
#48
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Comment: On your lost day article you stated that "Even the putative
reasons offered for the scientists' performing the calculations described in this legend make little sense. We need not know about any 'missing time' in the past in order to be able to launch spacecraft today." But because light can only travel so fast, the light we're seeing from stars today actually happened millions of years go, so essentially we're looking into the past. If I misinterpreted what you wrote, please inform me. |
#49
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#50
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Comment: RE: Rare pink dolphin
You call the story true - and it may well be - but there is a very questionable assumption in it: The article states that the albino dolphin appears pink because blood vessels under its blubber are giving a pink tone to its flesh. This ignores every American kid's elementary school biology - blood isn't red under the skin, it's blue until it makes contact with the air. |
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#52
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I've yet to find a good, quick way to counter this "logic". |
#53
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How about "Look at the capilliaries in the whites of your eyes. Oxygenated blood - red!"
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#54
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- snopes |
#55
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I believed that venous blood was blue and arterial blood was red until I was a freshman in high school. While I don't recall having read explicitly that venous blood was blue, I had a text on anatomy that showed the circulatory system with veins in blue and arteries in red, and I knew that arterial blood delivered the oxygen and somehow concluded that venous blood was blue (probably using my own arm as a reference). I was genuinely shocked to discover that this wasn't true.
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#56
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#57
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My completely uneducated guess would have to do with the thickness of the vessel walls. Arteries do not need to have thick walls, as blood is forced through them by the heart, so you can see the color of the blood within. Veins have thick walls to force the blood back to the heart, so they are not transparent and you instead see the color of the venous walls.
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#58
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ETA A better written explanation. Last edited by Eddylizard; 28 September 2007 at 05:47 PM. |
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Ahh thanks... it's been a really long time since science class, as you can tell! I remember the valves and all that now that you mentioned it. It was a cool theory though
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Nice illustration on that link. Ugh.
So why do the veins look blue (or green), though? |
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