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  • Did someone mention Tin Foil hats?

    Slightly - OT A group of MIT engineering students took to task the "Tin Foil Hat" myth and actually showed that it did the opposite of that the kooks wanted it to do.

    Good and entertaining reading here:

    http://people.csail.mit.edu/rahimi/helmet/

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    • Originally posted by Todd Tolhurst
      That's a dishonest misrepresentation of what has been said. Why bother saying such a thing?

      Let me rewrite that with a little more clarity, just for you, Todd.

      [sarcasm]It's good to know that regardless of how much new information is discovered about the world around us, that no one will ever be able to discover an application of that knowledge that will give mankind the ability to do something that has never been done before.[/sarcasm]
      Location: Saskatoon, Saskatchewan, Canada

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      • The sarcasm was drippingly obvious. I fail to see how that adds any weight to the comment.
        Todd

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        • Originally posted by Evan

          Any planet. Unaided also means no space suit. A planet with low enough gravity to allow such a jump will have no atmosphere.

          Didn't know we couldn't wear spacesuits - guess I forgot to read the fine print - Ok - how bout planet earth -- oh maybe around 3/4 way down to the center with an insulated ceramic tube to jump inside of --- Now what? we can't use ceramic tubes???

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          • Originally posted by A.K. Boomer
            Didn't know we couldn't wear spacesuits - guess I forgot to read the fine print - Ok - how bout planet earth -- oh maybe around 3/4 way down to the center with an insulated ceramic tube to jump inside of --- Now what? we can't use ceramic tubes???
            I think you could use another toke from your bong, there, Boomer.
            Keep that imagination active!
            John M...your (un)usual basement dweller

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            • Originally posted by Evan



              What is missing is constrained by what we already know. There is exactly zero chance that we will discover something that will invalidate all we know now. You might as well give up science entirely if you believe that. Of course, many have done just that.

              Gawd,,, If you stop to think about it for a second - I bet you that's exactly what they said,,, You know - the old ghosts from the past that thought the world was not only shaped like a pancake but so much of an important pancake (perhaps blueberry?) that everything else revolved around it.

              Perspective is my "Bong" deja, and it contains the magic smoke of reality...

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              • Perpetual motion is so far away from us that we cannot even conceive how it might be obtained, but on the other hand there is plenty of scope for tapping into the various 'free' energy sources that nature has been kind enough to provide for us.

                Wind and water power are long established methods of harnessing the energy of nature and I believe there is plenty of scope for further development in both, tidal too.

                In most places the atmosphere has a considerable gradient in static electricity voltage which could conceivably be tapped for power although probably at only miniscule levels in any practical system.

                Solar radiation, which drives the atmosphere and hence wind and water power, can be more directly utilised via photo voltaic cells and there is still plenty of scope for advances there.

                And so on, the list of potential alternatives to burning fossil fuels is considerable.

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                • There is really only one source of energy on this planet and it is solar power. It powers the weather and the rain, this causes rivers to run. It feeds the plants that were laid down millions of years ago and crushed into coal, oil and gases. It makes the wind blow and of course the radiant energy can be captured directly or turned into electricity.

                  Tides are also a result of the gravity of the Sun and the Moon. This planet and all the rest are the product of the death of an earlier generation of stars. The first generation of stars had no planets as there were no heavy elements until they were made by fusion in those stars. However, the heaviest element a star can make while it is undergoing the main sequence of stellar eveolution is iron.

                  The radioactive elements on this planet are a form of solar power as all of them were made by supernovas as dying suns exploded. Not only is the uranium and other fissionable material on the surface made of star stuff but the heat of the Earth's mantle and core is almost entirely generated by radioactive decay so even geothermal power is solar power only one step removed.
                  Free software for calculating bolt circles and similar: Click Here

                  Comment


                  • Originally posted by Evan
                    There is really only one source of energy on this planet and it is solar power. It powers the weather and the rain, this causes rivers to run. It feeds the plants that were laid down millions of years ago and crushed into coal, oil and gases. It makes the wind blow and of course the radiant energy can be captured directly or turned into electricity.

                    Tides are also a result of the gravity of the Sun and the Moon. This planet and all the rest are the product of the death of an earlier generation of stars. The first generation of stars had no planets as there were no heavy elements until they were made by fusion in those stars. However, the heaviest element a star can make while it is undergoing the main sequence of stellar eveolution is iron.

                    The radioactive elements on this planet are a form of solar power as all of them were made by supernovas as dying suns exploded. Not only is the uranium and other fissionable material on the surface made of star stuff but the heat of the Earth's mantle and core is almost entirely generated by radioactive decay so even geothermal power is solar power only one step removed.

                    so are we to asume you belive in the big bang theroy, or are you and eveloutionest, aka the ape theory..

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                    • Well, Ev, in that case, in order to achieve PM we'll have to figure out how to stoke the fire(so to speak) using the seemingly unlimited resourcesof the universe....and then "jump" universes before our existing one deteriorates.

                      We'll just use our future generations to perpetually keep the system going....
                      John M...your (un)usual basement dweller

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                      • Originally posted by airsmith282
                        so are we to asume you belive in the big bang theroy, or are you and eveloutionest, aka the ape theory..
                        The two have very little to do with each other. The Big Bang is a theory of the origin of the universe. Evolution is a theory of, as Darwin put it, the origin of species.

                        Of course, both are the standard theories in their fields, having been repeatedly supported by observation and experiment, and making testable predictions.
                        Todd

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                        • Originally posted by The Artful Bodger
                          Solar radiation, which drives the atmosphere and hence wind and water power, can be more directly utilised via photo voltaic cells and there is still plenty of scope for advances there.

                          And so on, the list of potential alternatives to burning fossil fuels is considerable.
                          Indeed there is - it's called night sky radiation, and it is the largest waste of energy on the planet. Every bit of energy we receive from the sun that is not used for maintaining our global temperature and which is not sequestered into plants and other earth processes is radiated back out into space as if it had no value.

                          That can be exploited.

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                          • Originally posted by airsmith282
                            so are we to asume you belive in the big bang theroy, or are you and eveloutionest, aka the ape theory..
                            Please tell us that you're just being a troll.

                            Comment


                            • Originally posted by dp
                              Indeed there is - it's called night sky radiation, and it is the largest waste of energy on the planet. Every bit of energy we receive from the sun that is not used for maintaining our global temperature and which is not sequestered into plants and other earth processes is radiated back out into space as if it had no value.

                              That can be exploited.
                              Would that increase the nett energy absorbed from the sun and tend to increase the temperature of the earth?

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                              • Originally posted by saltmine
                                While propane does provide perfect atomization, Bill, it also has a very low BTU rating, compared to gasoline. So, even with perfect mixing, you, in effect, have almost nothing to burn.

                                Hydrogen would atomize quite well and mix beautifully. Of course, hydrogen has about 13 times the energy of gasoline, per cubic foot of vapor.
                                Too bad it's highly explosive...Playing with it would be fun.
                                Note that I said " fuel efficiency", and not simply miles per gallon. The density and heating value of the fuels must certainly be considered before arriving at an efficiency comparison between any two carburetors using different fuels.
                                Propane powered cars are remarkably consistent in performance, and we used to keep one in our laboratory solely as a means of running a quick calibration check on our dynamometer equipment for exhaust emissions and fuel economy calculations. We also ran some test engines on hydrogen, and it may yet become a popular fuel choice for automobiles , although the earlier enthusiasm for hydrogen seems to have leveled off.
                                Last edited by Bill736; 07-21-2010, 11:04 PM.

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