The speed of life

Discussion in 'Astronomy, Exobiology, & Cosmology' started by kaneda, Nov 13, 2007.

  1. kaneda Actual Cynic Registered Senior Member

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    Is there a maximum speed beyond which we cannot travel and remain alive? A point at which a fore-shortened body and brain (in the direction of travel) will not be able to function, a speed at which the chemical reactions necessary for life cannot take place?
     
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  3. Enmos Staff Member

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    No, I think you are talking about acceleration rather than speed. At constant speed you might as well be standing still.
     
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  5. draqon Banned Banned

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    I think the maximum g's experienced by a living human was 20...during catapult from a Mig plane. But thats a bit of a myth, more plausible is 8 g's
     
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  7. Enmos Staff Member

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    And you're talking about acceleration, not speed.
     
  8. draqon Banned Banned

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    yes...and you? what are you talking about?

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  9. shichimenshyo Caught in the machine Registered Senior Member

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    constant speed...they ARE different
     
  10. Enmos Staff Member

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    Quite different.

    Draqon, the OP is talking about speed not acceleration.
     
  11. Fraggle Rocker Staff Member

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    You're forgetting the whole essence of relativity. To you in your spaceship, it appears that the universe outside is moving and experiencing the foreshortening. From your point of view you are standing still and everything in your ship is the right length.
     
  12. spuriousmonkey Banned Banned

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    people used to be afraid of the train because they thought that it's excessive speed would surely have detrimental effects on the health of the passenger.

    And it sure does when the train hits a massive object with no speed or opposite speed. The resulting deceleration (form of acceleration) causes havoc.
     
  13. kaneda Actual Cynic Registered Senior Member

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    I am not talking acceleration.

    As Fraggle Rocker points out, there is a foreshortening at relativistic speeds. As you start travelling at a noticeable fraction of light speed, you will shorten in the direction of travel (though to you, all will seem normal it is said). I believe that the energy is decreasing as it is crushed against the light barrier. Example. If you are travelling at half light speed and you shine a torch in the direction of travel, even though the beam is moving at light speed, it is effectively moving at only half light speed in comparison to the torch and you.

    Chemical reactions and even the electrical energy necessary to life will move at a slower rate, having less energy. At some speed they will not be sufficient to work and at that point, we will die.
     
  14. Enmos Staff Member

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    As Fraggle (and I) pointed out traveling at any constant speed is no different from standing still to the person traveling. Unless they are moving through some sort of medium without protection of course, but that's not what you mean I think.
     
  15. spuriousmonkey Banned Banned

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    as I tried to show with the train example, you can't know for sure till you try.

    Physicists are renowned for knowing shit about real life. Hence they might construct a spaceship capable of traveling faster than light (well, engineers would construct it), but do they know shit about whether you could survive the trip?

    no.
     
  16. Enmos Staff Member

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    No ?

    Why would constant speed at lightspeed be any different than at, say, 1000 mph ?
     
  17. spuriousmonkey Banned Banned

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    maybe an unknown particle decides to leave the host making him implode.
     
  18. Enmos Staff Member

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    Such a particle is not known to exist. I fail to see what sort of process would make the difference.. :shrug:
     
  19. spuriousmonkey Banned Banned

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    yeah...duh...because it is unknown!
     
  20. Enmos Staff Member

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    Occam's razor.. ?
     
  21. Nickelodeon Banned Banned

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    Occam should have slit his wrists.
     
  22. spuriousmonkey Banned Banned

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    he left it behind on Earth.
     
  23. Enmos Staff Member

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    Maybe he'll choke on his own beard.
     

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