How fast can humans travel in space?

Discussion in 'Science' started by Ronstar, May 12, 2015.

  1. really?

    really? New Member

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    I've always known you to admit when/if you make a mistake. It's refreshing!
     
  2. AboveAlpha

    AboveAlpha Well-Known Member

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    I wish I could fully display my appreciation for your post.

    AboveAlpha
     
  3. Gelecski7238

    Gelecski7238 Well-Known Member Past Donor

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    Better check what you were drinking. The difference in rocket engine performance in atmosphere versus in space is a fairly big deal. Cone taper that works best in the atmosphere loses a lot of efficiency in space. Some designs settle for a simple happy medium, while various others employ adjusting mechanisms. Check this one out: http://en.wikipedia.org/wiki/Expanding_nozzle
     
  4. OldManOnFire

    OldManOnFire Well-Known Member

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    I'm guessing it's not the speed of travel (assuming it's not near the SOL) that is the problem...it's the acceleration and deceleration. This assumes the human is traveling in near zero gravity conditions which means little to no G-force...except on those hard turns to avoid a slow moving ice cream spacecraft...
     
  5. OldManOnFire

    OldManOnFire Well-Known Member

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    Men go past 100K feet all the time...what are you talking about?
     
  6. really?

    really? New Member

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    You can, and you just did. My pleasure, and you know how much I like honesty!
    It's very true though, so I'm just stating fact :)
     
  7. tkolter

    tkolter Well-Known Member

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    Not far, we walk or run, so couldn't even leave orbit and likely would die burning up reentering the atmosphere.
     
  8. Validation Boy

    Validation Boy Well-Known Member

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    Sky dome tops out somewhere around 100,000 feet.
     
  9. OldManOnFire

    OldManOnFire Well-Known Member

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    If you mean humans without the aide of oxygen then they can't go above 13-14K feet without their lungs starting to lack oxygen..it's the fall of atmospheric pressure which effects the function of the lungs for the gas exchange...
     
  10. RevAnarchist

    RevAnarchist New Member Past Donor

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    True OMOF...I aint seen you around lately, wb.
    reva
     
  11. Validation Boy

    Validation Boy Well-Known Member

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    I'm talking about the physical barrier of our sky, which sits at 100,000 feet, and has never been penetrated by humans.
     
  12. OldManOnFire

    OldManOnFire Well-Known Member

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    I'm downsizing the amount of time I spend on these forums just to avoid a lot of nonsense. When many of the people on PF remain so biased, so ignorant, so political, so helpless, so righteous, so misguided, etc. etc. it becomes easy to see why society today is so screwed! I give a lot of credit for people on these forums expressing their thoughts but when most of them are hell-bent on their own path what's the sense in being involved in the discussion? If I can't learn something when I'm on PF then what's the point...but I preserver...
     
  13. OldManOnFire

    OldManOnFire Well-Known Member

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    Oct 24, 2014 - A well-known computer scientist, he fell faster than the speed of sound and broke Baumgartner's world altitude record set just two years ago by jumping from 135,000 feet.

    Humans have orbited the Moon which is about 240K miles away.
     
  14. Validation Boy

    Validation Boy Well-Known Member

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    Oh...

    You're one of THOSE people.

    So sad.
     
  15. AboveAlpha

    AboveAlpha Well-Known Member

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    By THOSE people you mean this member is educated?

    AboveAlpha
     
  16. really?

    really? New Member

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  17. OldManOnFire

    OldManOnFire Well-Known Member

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    I'm certainly a PEOPLE so you nailed it...
     
  18. Validation Boy

    Validation Boy Well-Known Member

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    The only way you're going to learn anything on here is if you read other people's posts. Stop being ridiculous.

    Sounds to me like you're deciding to back off these forums because people aren't on YOUR path, and you're tired of hearing truth. You can't handle it.
     
  19. OldManOnFire

    OldManOnFire Well-Known Member

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    Thank you for proving my point...or Validating my point...
     
  20. Validation Boy

    Validation Boy Well-Known Member

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    I'm here to validate the truth.
     
  21. AboveAlpha

    AboveAlpha Well-Known Member

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  22. Troianii

    Troianii Well-Known Member Past Donor

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    That's an interesting thought with 'warp speed' that's worth considering. Theoretically, I imagine that warp speed could be possible (so far as humans surviving it), but not with such a quick jump to it UNLESS warp speed was not actually a speed as we understand it but utilizing some kind of scientific catch to travel - one which I use to read into and care about but have since mostly forgotten.

    To put it to an extreme - if a human in a shuttle craft was accelerating at 1 mph each minute, when would the speed of the craft (assuming no collissions) result in the person's death? Theoretically, so far as I know, never. It's the rapid change (that is, significant acceleration) that kills people, not the speed.
     
  23. really?

    really? New Member

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  24. OldManOnFire

    OldManOnFire Well-Known Member

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    And don't slam on the brakes!
     
  25. Gelecski7238

    Gelecski7238 Well-Known Member Past Donor

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    The universe is not an image based on transfer from one piece of matter to another. Thus the inability to put a holographic image onto empty space due to lack of matter is irrelevant.

    Rather, the matter of the universe is a derivative of the underlying quantum energy fields (including the vacuum of spacetime, now known to be not inert and not flat), as you surely know. Holographic production is the derivation of the explicate from the implicate. Patterns produced by interacting frequencies contribute to its fractal nature. The universe is a hologram.

    You have much more mental capacity and education than I do. Maybe someday we'll figure out why you get these mental kinks. LOL.
     

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