A real (boaty) logic puzzle

[martynwhiteley]

Big Al has left his Rinker anchored in the middle of Loch Ness (Poetic licence- I know it's on Lomond) with 20 large stones on board he's pinched from Urquart Castle the previous evening. (To make a coffee table for a key Japanees client - but that's not relavent to this puzzle).

During the night, old Nessie comes up for a breather and tips the baby Rinker from side to side so much that all 20 stones, weighing half a ton, fall out of the boat, and sink until they hit the bottom some 700 ft down (narrowly missing some guy in a 100 year old diving suit walking along the the bed).

Now the puzzle is...........

After the stones fell out of Indiana and into the water, did the level of water in the Loch stay the same, or did it rise, or did it fall?

No 50/50's or phoning friends in Ft Augustus please).

<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[longjohnsilver]

No change NM

.

<hr width=100% size=1>

 

[mainshiptom]

No rise and no fall !

The boat already displaced the weight !

Tom

<hr width=100% size=1>

 

[jfm]

nearly the same

It stayed the same. (Well, actually it will have fallen a tiny tiny bit, because a stone on the bottom at 700 feet down is slightly more compressible than the water displaced by that stone)

<hr width=100% size=1>

 

[martynwhiteley]

Re: nearly the same

Your getting warmer that the other two 'no hopers' above, but your reasoning is flawed. Keep trying!

<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[Alistairr]

I take it you've been back out for a liquid lunch, Martyn?

Theres one major problem with your story......
.
I maybe new to boating.



.
.
.
But who? in their right mind would try to anchor in 700ft of Water!!!!!!!!!!/forums/images/icons/crazy.gif



<hr width=100% size=1>

Petrol Rules..

 

[Alistairr]

Re: nearly the same

BTW, The waterlevel ain't gonnae change because the Loch is open to the Seas...



<hr width=100% size=1>

Petrol Rules..

 

[burgundyben]

think the answer lies in whether the stones are more or less dense than water?

<hr width=100% size=1>Sod the Healey - I think I'll buy an E-Type.

 

[EME]

Think it depends upon whether tide is rising or falling cos it's a sea loch isn't it?

<hr width=100% size=1><font color=blue>I am WHAT I say I am</font color=blue>

 

[martynwhiteley]

LOCH NESS IS NOT A SEA LOCH

LOCH NESS IS FRESH WATER

IT'S PART OF THE CALEDONIAN CANAL!!!

Alistair should have known that at least, although I take his point about anchoring in 700ft, only H1 would be capable of that.

<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[martynwhiteley]

AND ONE MORE THING....

IF IT WAS A SEA LOCH....HOW DO YOU THINK THEY STOP THE MONSTER ESCAPING?




<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[BoatlessinOslo]

With 10 tonnes of stones (and 700ft + of anchor chain) on board the Rinker would already be on the bottom !

<hr width=100% size=1>Why's that smoke coming out the hatch ?

 

[aztec]

Re: No change NM

ditto... unless of course a stone hit nessie on the head and she had to go to hospital.


<hr width=100% size=1>

 

[martynwhiteley]

Perhaps I should clarify that the TOTAL weight of all 20 stones was half a ton.

And if it makes you all feel better. the boat was moored to a bouy, not anchored.




ps. Alistair I've been on J2O all these week so no alcohol!

<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[EME]

Oops.... well let's have another go.

As Nessie has taken 'a breath of air' Displacement is greater therefore water has risen...

<hr width=100% size=1><font color=blue>I am WHAT I say I am</font color=blue>

 

[burgundyben]

Re: No change NM

Wrong John (sticking his neck out), say it was a lump of lead, 1 ltr volume, 2 kgs mass, when the lead is in the boat the boat would displace 2 litres of water more due to the 2 kgs of lead, remember displacement in litres = mass in kgs

now if dear little (or big even) Nessy rocks the boat and the lead falls in the drink the boat would displace 2 litres less than it was but the lead itself would displace 1ltr - remember we said the lead was 1 ltr but 2 kgs, so water level drops by 1 ltr

see it depends on density.

<hr width=100% size=1>Sod the Healey - I think I'll buy an E-Type.

 

[martynwhiteley]

Sorry I'm suffering from alcohol defficiency and a bad back today, so opologies if I'm coming over as a little touchy.

There is a scientific answer to this - any quantity surveyors on the forum?





<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[martynwhiteley]

Re: No change NM

Doh !

BEN's GOT IT !!!!!!!!!!!!!!!!!!!!

Well Done. Owe you a pint now, and I think I still owe Forbsie one as well after B1 passed his winnings on last time.


/forums/images/icons/wink.gif

<hr width=100% size=1><font color=blue> <A target="_blank" HREF=http://www.mboat.org>http://www.mboat.org</A></font color=blue>

 

[burgundyben]

Re: No change NM

I did say that first time round but every f*cker ignored me, its cos its clicky round here....lol....

Anyway, told you so, ner ner ner nah!!!

<hr width=100% size=1>Sod the Healey - I think I'll buy an E-Type.

 

[Alistairr]

Re: No change NM

Ach!!!!!! BEN!!!!!

Did you have to guess it so quickly, I was enjoying being centre of Attention, for a minute.

<hr width=100% size=1>

Petrol Rules..