RE: [PSUBS-MAILIST] Quiz question

Hello James,

http://www.pbs.org/wgbh/nova/lasalle/buoypool.html

http://www.pbs.org/wgbh/nova/lasalle/buoyancy.html

I knew all the rhymes of information I've been archiving would be of some use some day. So James, what's my prize for being johnny on the spot?

"This should be a piece of cake for people who design/build psubs,
right? ;)

3 problems involving buoyancy:
http://www.pbs.org/wgbh/nova/lasalle/buoyancy.html

Good Luck!
Ian."

Cheers,
Brent

[PSUBS-MAILIST] Buoyancy Brainteasers‏
From:	owner-personal_submersibles@psubs.org on behalf of Ian Roxborough (irox@ix.netcom.com)
Sent:	Sat 9/22/07 8:23 PM
Reply-to:	personal_submersibles@psubs.org
To:	personal_submersibles@psubs.org

 
This should be a piece of cake for people who design/build psubs,
right? ;)
 
3 problems involving buoyancy:
 http://www.pbs.org/wgbh/nova/lasalle/buoyancy.html
 
Good Luck!
Ian.

> Date: Mon, 25 Feb 2008 21:01:20 -0800
> From: irox@ix.netcom.com
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Quiz question
>
>
> I think I might have posted it, but I can't find the email.
>
> If it turns up I'll pass it a long.
>
> Cheers,
> Ian.
>
> -----Original Message-----
> >From: "Sean T. Stevenson" <cast55@telus.net>
> >Sent: Feb 25, 2008 6:23 PM
> >To: personal_submersibles@psubs.org
> >Subject: Re: [PSUBS-MAILIST] Quiz question
> >
> >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
> >>
> >>
> >>
> >>
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