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Challenger Deep reached again

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  • lonewolf
    replied
    Re: Challenger Deep reached again

    If it hit you after dropping 35,000 + feet would it hurt more than from, say, 35 feet?

    Leave a comment:


  • gh
    replied
    Re: Challenger Deep reached again

    does it make a difference if you drop it with the spin style as opposed to the glide?

    Leave a comment:


  • Conor Dary
    replied
    Re: Challenger Deep reached again

    Originally posted by DrJay
    60 minutes seemed a bit long to me. I can picture a shot descending a lot more rapidly than 7 mph.
    I was thinking that myself. I would bet it is closer to half an hour or less.

    Anyone want to experiment in their bathtub? :lol:

    Leave a comment:


  • DrJay
    replied
    Re: Challenger Deep reached again

    60 minutes seemed a bit long to me. I can picture a shot descending a lot more rapidly than 7 mph.

    Leave a comment:


  • 26mi235
    replied
    Re: Challenger Deep reached again

    The key thing for shrinking under pressure is the density of the shot, which is about the same for all of them, and the ability of the material to resist compaction (the surface material on the indoor shot would become thinner, however). I would guess that most of the materials will not shrink much because they have a lot of internal support. [note how little water compacts]

    As for the surface area/volume, since the mass factors as the cube and the cross-section as the square of the linear dimension, it should have increased force per unit of area offering resistance.

    Leave a comment:


  • Conor Dary
    replied
    Re: Challenger Deep reached again

    Originally posted by kuha
    And, by the time it got to the bottom, how much would the pressure reduce the ball's diameter?
    It would probably shrink to the size of a black hole and swallow the entire earth, which means you wouldn't have to make coffee tomorrow.

    But seriously, it is about 15 lbs per square inch at sea level and 35,000 ft. deep is about 1200 atmospheres. So about 9 tons per square inch. So a little smaller assuming it is solid steel, or better even iron. As for one of those indoor shots? Forget it. I think it would like a vitamin pill by the time it hit bottom.

    Leave a comment:


  • SQUACKEE
    replied
    Re: Challenger Deep reached again

    Originally posted by kuha
    And, by the time it got to the bottom, how much would the pressure reduce the ball's diameter?
    Probably the most obscene thing I have ever read!

    Leave a comment:


  • kuha
    replied
    Re: Challenger Deep reached again

    And, by the time it got to the bottom, how much would the pressure reduce the ball's diameter?

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  • catson52
    replied
    Re: Challenger Deep reached again

    Originally posted by Marlow
    Originally posted by catson52
    Making various simplifying assumptions, I get something like 30 min. to reach bottom for the 16 lb shot. If made of the same material, the 12 lb shot should reach a slightly lower terminal velocity, take ~5% longer to make the same journey.
    Does its smaller size (less surface friction) help it?

    Terminal velocity appears to depend on both the mass and the "surface area" of the object. In the given case, the mass difference (in the numerator), seemed to more than offset the "surface area" difference (in the denominator).

    Leave a comment:


  • Marlow
    replied
    Re: Challenger Deep reached again

    Originally posted by catson52
    Making various simplifying assumptions, I get something like 30 min. to reach bottom for the 16 lb shot. If made of the same material, the 12 lb shot should reach a slightly lower terminal velocity, take ~5% longer to make the same journey.
    Does its smaller size (less surface friction) help it?

    Leave a comment:


  • catson52
    replied
    Re: Challenger Deep reached again

    Making various simplifying assumptions, I get something like 30 min. to reach bottom for the 16 lb shot. If made of the same material, the 12 lb shot should reach a slightly lower terminal velocity, take ~5% longer to make the same journey.

    Leave a comment:


  • gh
    replied
    Re: Challenger Deep reached again

    I dropped out of HS physics (made my head ache, didn't' need the credits), but.... would it take longer or shorter for a 12-pound shot to drop?

    Leave a comment:


  • DrJay
    started a topic Challenger Deep reached again

    Challenger Deep reached again

    http://wonderwall.msn.com/movies/james- ... 3267.story

    A T&F connection (well, kind of a stretch.) I read somewhere long ago that a 16 lb shot, dropped in the Pacific over the Deep, would take 60 minutes to reach the bottom.
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