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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 01/22/2003 :  20:01:00  Show Profile
<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
"Can an object, without altering it's physical properties or any other molecular trickery, both float on water and sink like a rock
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
You ruled out Derek's boat, but that's one obvious answer--an object contains air or another lighter substance to float, but sinks when the subtance is replaced by water, as a sailboat might when ot broaches with an open hatch in big chop.

Another possibility is something that floats on water but sinks in a lighter substance such as alcohol.

Dave Bristle - 1985 C-25 #5032 SR-FK-Dinette-Honda "Passage" in SW CT
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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 01/22/2003 :  20:04:26  Show Profile
<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Mmmmm, just another thought, "one fellow tosses the anchor". It doesn't say he tossed the anchor into the water, perhap he tossed the anchor onto the shore. In that case the lake level would rise. <img src=icon_smile_approve.gif border=0 align=middle>

Don Peet
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
Mmmmmm... Think about that a little harder, Don...

Dave Bristle - 1985 C-25 #5032 SR-FK-Dinette-Honda "Passage" in SW CT
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 01/22/2003 :  20:08:11  Show Profile
<b>"...an object contains air or another lighter substance to float, but sinks when the subtance is replaced by water..."</b>

This would change the molecular makeup(density) of the object and in my query I said the object can't be altered in anyway. Hint: It doesn't have anything to do with air.

Don Lucier, 'North Star'
C25 SR/FK
Cradled on the hard, 200ft from Lake Erie
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jsummerfield
1st Mate

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USA
96 Posts
Response Posted - 01/22/2003 :  21:17:54  Show Profile
Surfac tension - remember how to float a needle on the water to form a magnetic compass?

In addition to being a hot day, there had been a breeze and the wind died. Perhaps the waves had been splashing over the spillway during the wave peaks. What happens now without the breeze?

Shouldn't that make the fishing better?
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 01/22/2003 :  21:21:10  Show Profile
<b>"Surface tension - remember how to float a needle on the water to form a magnetic compass?" - John Summerfield</b>

<font size=4>BINGO!...We have a Winner!</font id=size4>

Don Lucier, 'North Star'
C25 SR/FK
Cradled on the hard, 200ft from Lake Erie

Edited by - dlucier on 01/22/2003 21:22:07
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osmepneo
Past Commodore

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USA
1420 Posts
Response Posted - 01/23/2003 :  05:25:34  Show Profile
Derek replied to one of my postings,

Mmmmm, just another thought, "one fellow tosses the anchor". It doesn't say he tossed the anchor into the water, perhap he tossed the anchor onto the shore. In that case the lake level would rise.

Don Peet

Mmmmmm... Think about that a little harder, Don...

<font size=6><img src=icon_smile_blush.gif border=0 align=middle> <img src=icon_smile_blackeye.gif border=0 align=middle></font id=size6>

<font size=1>Um, . . . er, can I go back and edit that post?</font id=size1>

Yup! If the guy tossed the anchor on shore the lake level would drop. That's what I meant to say, but fingers typed wrong. Go figure.

Don Peet
c25, 1665, osmepneo, sr/wk
The Great Sacandaga Lake, NY
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jsummerfield
1st Mate

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USA
96 Posts
Response Posted - 01/23/2003 :  07:21:50  Show Profile
&lt;Upon deciding on the right spot one fellow tosses the anchor and they bait up.&gt;

Tosses the anchor ... into the water? If tossed onto land or a piling the level would drop. Very good.
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Brooke Willson
Admiral

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USA
983 Posts
Response Posted - 01/23/2003 :  07:45:16  Show Profile
OK. Whether Don's reasoning is right or not, his answer (the lake went down) is right. I half filled my kitchen sink with water, floated a bowl with a heavy pizza cutter in it. I marked the water level, took the pizza cutter out and immersed it. The water level went down.

And by the way, I DO know that density requires volume. Duh.

Brooke
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 01/23/2003 :  08:33:32  Show Profile
My deepest apologies for all the commotion this puzzle caused. The answers were a tie between Doug/Ruth and Don, with Don's the more substantiable but Doug/Ruth's equally significant.

Val on the hard, obviously, DAGNABIT

Val Bisagni
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Champipple
Master Marine Consultant

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USA
6855 Posts
Response Posted - 01/23/2003 :  08:41:38  Show Profile  Visit Champipple's Homepage
<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Three guys go sailing on a very hot day(not the northeast)and when the wind finally dies altogether they decide to kick back and drain a beverage or two and try the fishing. Upon deciding on the right spot one fellow tosses the anchor and they bait up. QUESTION is, did the lake water level rise, fall or stay the same?
It was a very large anchor...just go with it.

Val on the hard DAGNABIT


Val Bisagni
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Not sure it makes a difference to the question, but did they bait up, or did they bait their hooks?
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Champipple
Master Marine Consultant

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USA
6855 Posts
Response Posted - 01/23/2003 :  08:49:00  Show Profile  Visit Champipple's Homepage
The initial displacement of the boat is a volume of water whose weight is that of the boat (including the anchor). By throwing the anchor overboard the displacement of the boat is decreased by a volume of water whose weight is that of the anchor. The anchor at the bottom of the lake will occupy a smaller volume and hence the level of the lake will fall.



Edited by - Duane Wolff on 01/23/2003 08:50:58
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osmepneo
Past Commodore

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USA
1420 Posts
Response Posted - 01/23/2003 :  16:42:43  Show Profile
Um, I think they got Ollie.

Don Peet
c25, 1665, osmepneo, sr/wk
The Great Sacandaga Lake, NY
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Danielle
Deckhand

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17 Posts
Response Posted - 01/23/2003 :  18:45:39  Show Profile
Was it Lite beer or full flavored?
Danielle
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Mark Loyacano
Navigator

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USA
247 Posts
Response Posted - 01/24/2003 :  01:30:53  Show Profile
Val. We love 'ya.
Hope you are enjoying this a bunch.
Mark L.
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MattL
Admiral

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USA
990 Posts
Response Posted - 01/24/2003 :  03:36:21  Show Profile
Brooke,
I think you need to check and see if your water level goes down anyway. Got a tight seal on that their plug ya know.

Matt/Brigitte Loeffler
E.C. Rider
Cat 25 86'
FK/SR _/)
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Brooke Willson
Admiral

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USA
983 Posts
Response Posted - 01/24/2003 :  05:26:04  Show Profile
Huh????????

Brooke
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osmepneo
Past Commodore

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USA
1420 Posts
Response Posted - 01/26/2003 :  19:32:49  Show Profile
Hey Brooke, thanks for modifying my experiement. I think it worked and you done good.

Don Peet
c25, 1665, osmepneo, sr/wk
The Great Sacandaga Lake, NY
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