The Riddle

Discussion in 'All Things Boats & Boating' started by PAUL XAVIER, Jan 8, 2016.

Page 2 of 2
  1. Angélique
    Joined: Feb 2009
    Posts: 3,003
    Likes: 336, Points: 83, Legacy Rep: 1632
    Location: Belgium ⇄ The Netherlands

    Angélique aka Angel (only by name)

    The result is basically similar, but the outcome of the experiment will be much more significant.
     
    Angélique, Jan 12, 2016
    #16
  2. Tiny Turnip
    Joined: Mar 2008
    Posts: 865
    Likes: 274, Points: 63, Legacy Rep: 743
    Location: Huddersfield, UK

    Tiny Turnip Senior Member

    indeed! :D
     
    Tiny Turnip, Jan 12, 2016
    #17
  3. Tiny Turnip
    Joined: Mar 2008
    Posts: 865
    Likes: 274, Points: 63, Legacy Rep: 743
    Location: Huddersfield, UK

    Tiny Turnip Senior Member

    and it does rather beg the question of the pre-existing condition!
     
    Tiny Turnip, Jan 12, 2016
    #18
  4. ImaginaryNumber
    Joined: May 2009
    Posts: 436
    Likes: 59, Points: 28, Legacy Rep: 399
    Location: USA

    ImaginaryNumber Imaginary Member

    Examining the extreme limits can sometimes clarify situations which appear ambiguous around normal conditions. Computer Scientists are taught to test their programs at zero and +/- the largest number their computer can generate, for instance.

    So pretending the stone has a large mass but negligible volume may clarify what is happening in the OPs riddle. You could also imagine that the stone has little mass but a large volume (a helium balloon).
     
    ImaginaryNumber, Jan 12, 2016
    #19
  5. JSL
    Joined: Nov 2012
    Posts: 811
    Likes: 64, Points: 28, Legacy Rep: 41
    Location: Delta BC

    JSL Senior Member

    No stone is left unturned!
     
    JSL, Jan 12, 2016
    #20
  6. philSweet
    Joined: May 2008
    Posts: 2,697
    Likes: 461, Points: 83, Legacy Rep: 1082
    Location: Beaufort, SC and H'ville, NC

    philSweet Senior Member

    The mechanical approach - Use a chain of simple actions to get from start to end. The effects of each action are understood to be analytic. So begin with a boat, rock, string, and lake. The system is quiescent. Gently use string to lift rock in air and stop. Evaluate lake level. Gently immerse rock in lake, holding string which is still has some tension on it. Evaluate lake level. Release string. Evaluate lake level.

    The properties approach. Identify the mass and volume of each component. Since the rock sinks, we know the derived quantity density of the rock is greater than the density of the lake. Predict the result based solely on properties of the system's components without any consideration of the mechanisms involved.
     
    philSweet, Jan 12, 2016
    #21
  7. Mr Efficiency
    Joined: Oct 2010
    Posts: 10,386
    Likes: 1,045, Points: 113, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    The OP hasn't returned to complain, so it must have answered the homework question.
     
    Mr Efficiency, Jan 12, 2016
    #22

  9. hoytedow
    Joined: Sep 2009
    Posts: 5,857
    Likes: 400, Points: 93, Legacy Rep: 2489
    Location: Control Group

    hoytedow Carbon Based Life Form

    Did you hear about the flock of seabirds which came across some jettisoned drugs?

    No tern was left un-stoned.
     
    hoytedow, Jan 12, 2016
    #23
Page 2 of 2
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.