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Author fridays very random question
Matt L
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Registered: 17th Apr 06
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5th Mar 10 at 14:58   View User's Profile U2U Member Reply With Quote

which way is quicker to empty a 2lt bottle of water?

tip it directly up causing emptying to briefly stop every few seconds while air passes back into the bottle

or

slowy tilt the bottle so that the maximum amount of water can exit without it stopping to 'suck air back in' so to speak.

answers on a postcard please
sc0ott
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Registered: 16th Feb 09
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5th Mar 10 at 14:59   View User's Profile U2U Member Reply With Quote

tilt
Behr
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Registered: 5th Feb 07
Location: Hemel Hempstead
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5th Mar 10 at 15:00   View User's Profile U2U Member Reply With Quote

tilt or swirl the bottle this works realy well
bigboykarl
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Registered: 19th May 09
Location: South Yorkshire
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5th Mar 10 at 15:01   View User's Profile U2U Member Reply With Quote

stick a long straw in and tip it directly up
Fro
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Registered: 20th Jun 06
Location: Rainham, Essex Drives: A3 2.0TDi Sport
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5th Mar 10 at 15:02   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by bigboykarl
stick a long straw in and tip it directly up
Matt L
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5th Mar 10 at 15:11   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by bigboykarl
stick a long straw in and tip it directly up


wouldnt that be the same speed as tilting?

(use this method when drinking tho )
Tommy
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Registered: 24th Aug 00
Location: Essex, Colchester
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5th Mar 10 at 15:15   View User's Profile U2U Member Reply With Quote

Tip and squeeze
Fro
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Location: Rainham, Essex Drives: A3 2.0TDi Sport
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5th Mar 10 at 15:16   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Matt L
quote:
Originally posted by bigboykarl
stick a long straw in and tip it directly up


wouldnt that be the same speed as tilting?

(use this method when drinking tho )


Same, downing WKD bottles to look cool is where it's at
jibjob
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Registered: 6th Apr 08
Location: Elworth, Cheshire
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5th Mar 10 at 15:19   View User's Profile U2U Member Reply With Quote

cut the bottom off the bottle
Aaron
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Registered: 9th Aug 04
Location: Cottingham, East Riding
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5th Mar 10 at 15:19   View User's Profile U2U Member Reply With Quote

Cut the bottle in half with a big fuck off knife...that should work pretty well...

...oh, i see what you're doing

bigboykarl
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Location: South Yorkshire
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5th Mar 10 at 15:22   View User's Profile U2U Member Reply With Quote

smash the bottle over somebodys head ...instant spill
ShEp
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Registered: 9th Aug 05
Location: Dingwall, Highland
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5th Mar 10 at 15:31   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by fro-dizzle
quote:
Originally posted by bigboykarl
stick a long straw in and tip it directly up



only works with glass
C2RL R
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Registered: 28th Mar 02
Location: Redcliffe, QLD
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5th Mar 10 at 15:36   View User's Profile U2U Member Reply With Quote

what would happen if you tried both ways on a conveyor belt?
Matt L
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5th Mar 10 at 15:39   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by C2RL R
what would happen if you tried both ways on a conveyor belt?


water wouldnt move it would defy gravity and stay in the bottle.

shep - seriously
Fro
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Location: Rainham, Essex Drives: A3 2.0TDi Sport
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5th Mar 10 at 15:40   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by ShEp
quote:
Originally posted by fro-dizzle
quote:
Originally posted by bigboykarl
stick a long straw in and tip it directly up



only works with glass


He didn't specify the material of the bottle

In all seriousness though thats quite interesting to know
Generation
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Registered: 7th Jul 09
Location: Essex
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5th Mar 10 at 15:56   View User's Profile U2U Member Reply With Quote

Why does it only work with glass? never heard that before, but then again never tried on plastic
Tomnova16
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Registered: 21st Jan 06
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5th Mar 10 at 16:40   View Garage View User's Profile U2U Member Reply With Quote

its to do with the air up the straw to replace where the fluid was so would work on plastic too surely


http://www.lemass.co.uk/ for all your automotive/bodyshop needs
Located in Chalfont st Peter
Kurt
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5th Mar 10 at 16:48   View User's Profile U2U Member Reply With Quote

Tilt and twist
dean101287
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Location: Cardiff
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5th Mar 10 at 17:09   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Tomnova16
its to do with the air up the straw to replace where the fluid was so would work on plastic too surely
Ian
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Registered: 28th Aug 99
Location: Liverpool
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5th Mar 10 at 17:31   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Matt L
the maximum amount of water can exit without it stopping to 'suck air back in'
It does suck it back in, it just does it more efficiently using the hole in the bottle for both purposes simultaneously.

My first thoughts are that tilt is better than tip, just because with tip you have the water which has to overcome inertia to move, then it moves, then the pressure decreases inside the bottle which causes the bottle to deform and also the water to become less inclined to flow, until the pressure overcomes the combination of gravity and the viscosity of the water and the water stops allowing air to enter, then once it has the whole process has to start again.

Just sounds a whole load easier to do it without any of that fuss.

Think about if you drew a graph of water flow over time. The tip graph would probably look comparable to an absolute sine wave of some sort, which due to the acceleration/deceleration of the water has a lower mean average than tilt which would be basically a straight line.
Ian
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5th Mar 10 at 17:33   View Garage View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Generation
Why does it only work with glass? never heard that before, but then again never tried on plastic
It only works if the bottle doesn't deform, which glass doesn't and which plastic might.

If the bottle deforms, there's no drop in pressure to suck on the straw.
jibjob
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5th Mar 10 at 17:33   View User's Profile U2U Member Reply With Quote

Ian i think i understand maybe half of that


[Edited on 05-03-2010 by jibjob]
mattk
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5th Mar 10 at 17:34   View User's Profile U2U Member Reply With Quote

best of siphoning it
Generation
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5th Mar 10 at 17:39   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Ian
quote:
Originally posted by Generation
Why does it only work with glass? never heard that before, but then again never tried on plastic
It only works if the bottle doesn't deform, which glass doesn't and which plastic might.

If the bottle deforms, there's no drop in pressure to suck on the straw.

Oh so alot depends on thickness of then bottle then, as its less likly to deform
sand-eel
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Registered: 15th Mar 07
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5th Mar 10 at 17:42   View User's Profile U2U Member Reply With Quote

You have to tip it fully over and swirl the water round, it comes out pretty fast then.

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