Re: [PSUBS-MAILIST] Quiz question

["Sean T. Stevenson" <cast55@telus.net>]

James - I remember what you are talking about:  counterintuitive questions
regarding buoyancy.  I don't remember what they were, apart from the one that
you refer to specifically.  

In that one, the level of the lake will fall.  If we can assume that the density
of rock (unspecified) is greater than the density of the lake water, then when
the rock is in the boat, it displaces a volume of lake water equal to the weight
of the rock.  When the rock is thrown overboard, it sinks to the bottom (i.e.
its weight is no longer balanced by the buoyancy force), and displaces a volume
of lake water equal only to the volume of the rock.

-Sean


Quoting James Frankland <james@guernseysubmarine.com>:

> Does anyone have a link to those 3 sub related quiz questions that were 
> posted a while back.
> 
> It was just  a few fun questions.
> 
> There was one with a man sat in a boat on a lake with a large rock in the 
> boat.  The question was that if he chucked the rock overboard, did the water
> 
> in the lake rise or fall?
> 
> My Dad is doing a quiz for the local yacht club and has asked me for some 
> ideas that might get people thinking.  I thought that would be a good one 
> for people.
> 
> Can anyone remember what i mean?
> Thanks
> James 
> 
> 
> 
> 
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
> 
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> 	removeme-personal_submersibles@psubs.org
> 
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
> 
> PSUBS.ORG
> PO Box 53
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************
> 
> 







************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************