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# Easy one

Vinod John
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Posts: 162
How will you remove exactly 1/2 the quantity of water from a cylindrical vessel filled with it (water) ?. The vessel is filled fully and no external tools/instruments are allowed.

HS Thomas
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Posts: 3404
Drink half ?
regards

Vinod John
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Posts: 162
Originally posted by HS Thomas:
Drink half ?
regards

You got the question wrong ... The question is how will you measure and remove 1/2 the water and not what will you do with the removed water ... got it. Bcos of your answer/? I will have to replace water with HCL .. now try drinking

Vijay S. Rathore
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Posts: 449
Tilt the glass to such an angle that the water surface is exaclty the digonal form touching both the bottom and top edges exactly.
Will try to embed image as soon as possible.
[ August 20, 2003: Message edited by: Vijay Rathore ]

HS Thomas
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Posts: 3404
I suppose exactly was the keyword .

Measure half the volume of a much heavier <strike >(liquid ,Mercury and pour it into the flask. I don't know what happens when you mix Mercuty and Hcl </strike>
Try sand to be on the safe side , and pour into flask. Exactly half the water should be removed ! Aha !
I suppose that comes under external tools ! I give up ! )
regards
[ August 20, 2003: Message edited by: HS Thomas ]

Vijay S. Rathore
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Posts: 449
Hope this helps.

[ August 20, 2003: Message edited by: Vijay Rathore ]

HS Thomas
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Posts: 3404
Clever Cloggs ! Are you sure ?
Your vessel has a smaller base than the rim above. So emptying some as you've shown ain't necessarily half. Exactly half in your vessel will show a line ending a bit above the base.
I think!
regards

Jim Yingst
Wanderer
Sheriff
Posts: 18671
Your vessel has a smaller base than the rim above.
In the picture, yes. But the original problem said the vessel was cylindrical, so this should not be an issue.

Vinod John
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Posts: 162
Originally posted by HS Thomas:
I suppose exactly was the keyword .
Measure half the volume of a much heavier <strike >(liquid ,Mercury and pour it into the flask. I don't know what happens when you mix Mercuty and Hcl </strike>

Me too ... but I know what happened when I mixed HCL with nitric acid, I got suspended from chemistry class .
Originally posted by HS Thomas:

Try sand to be on the safe side , and pour into flask.

I prefered liquid bcos it is easier to pour it by tilting.
Originally posted by HS Thomas:

Clever Cloggs ! Are you sure ?
Your vessel has a smaller base than the rim above. So emptying some as you've shown ain't necessarily half. Exactly half in your vessel will show a line ending a bit above the base.
I think!

I am not sure about Vijay's cylinder (it is invisible to my eyes) ... but the general definition for cylinder as per "atomica" is
"The portion of such a surface bounded by two parallel planes and the regions of the planes bounded by the surface."
BTW: Vijay you are correct
[ August 20, 2003: Message edited by: Vinod John ]

HS Thomas
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Posts: 3404
Jim , you can tell I am a modeller ... A picture is worth a thousand words the rest are just details.

Vijay , I am glad you got it right .
regards
[ August 20, 2003: Message edited by: HS Thomas ]

Vijay S. Rathore
Ranch Hand
Posts: 449
Fixed the image.