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Well we're making assumptions now arent we? Presumably, if the astronauts wished to take a bathtub of water into space with them, it would prove unnecessary and inefficient to transport that water in any container other than the bathtub. It would be an unacceptable waste of energy and manpower to have to transfer the liquid from the transport container to the bathtub. Therefore it follows that it would be far easier to take the water into space in the tub. To do this, i suggest they fill the tub prior to loading it onto the space transportation vehicle, and freeze it. A solid mass of water would of course be much more suitable for transportation purposes. It could then be thawed out in the ambient heat of the spacecraft, and dumped into a decaying orbit before re-entry.
p.s today i had chow mein super noodles.
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[ This Message was edited by: switchbitch on 2004-04-16 13:46 ]
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Posted: 2004-04-16 14:36:00
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Wow, this is really fascinating stuff.
I suppose that the space ship could also be put into rotation, in such a way that the centripetal force created matches that of the gravitational pull of the earth. That way, everything in the ship would be 'flung' towards the walls, including the bathtub and the water contained in it. The astronaut could then splash about as much he likes, although if the rotation of the ship were too fast, the centripetal force would be too high and the rubber dack / chicken would sink to the bottom of the bath. And the guy wouldn't be able to get out of the bath. And it might make him feel a bit sick.
I had a Tuna and mayonaise roll and a raspberry flapjack, by the way.
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Posted: 2004-04-16 14:55:46
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I disagree. No matter how strong the "centripetal" force (which is actually an imaginary force used to describe the unusual effects of angular velocity), the rubber duck will not sink. If the gravitational force exerted on the bathtub was to increase, it would increase the weight of the duck, but it would not affect the density. Since the duck is far less dense than the water, it would continue to float regardless of the "intensity" of the gravitational force.
_________________
1st lieutenant and military advisor of ELF; chief in command of breakable objects.
Five star Esato member; all round quality posting.
* * * * * (Highly respected)
[ This Message was edited by: switchbitch on 2004-04-16 14:15 ]
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Posted: 2004-04-16 15:10:00
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Ah, no,no,no!!!
CentriFUGAL force is imaginary! Centripetal force is an actual force that exists between the centre point of rotation and the object that is in a state of angular acceleration. It acts TOWARDS the centre point of rotation, not away from it as many people would expect. It's the reaction of this centripetal force that people call 'centrifugal force' (Newton's third law)
http://hyperphysics.phy-astr.gsu.edu/hbase/cf.html
And as for the duck sinking, if the 'force' (or effect of rotation whatever) pushing it down in the water became greater than the upthrust caused by the boyancy effect of the water on the duck, then it could well sink to the bottom of the bath. Density has nothing to do with it, it's like you using your hand to push the duck to the bottom of the bath.
That Tuna and Mayo Roll was delicious, it really was.
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'He who laughs last, laughs longest. Or didn't get the joke...'
[ This Message was edited by: Cycovision on 2004-04-16 14:38 ]
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Posted: 2004-04-16 15:32:51
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My mistake, getting mixed up with my centrifugal and centripetal. I disagree though, with your analogy of "pushing" the duck with your hand. If the water was experiencing a higher gravitational force, then it would take much more downward force by the duck to displace its own volume of water, since the water's weight has also increased. Since the gravitational effect acting on both the duck and the water is the same, these effects would essentially cancel out....
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Posted: 2004-04-16 15:49:00
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Possibility....I feel an experiment coming on!
Anyone got a bucket of water, a bit of rope and a rubber duck?
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Posted: 2004-04-16 17:32:47
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I cant continue my life without knowing the answer to this, so i shall endeavour to come up with some sort of solution.
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Posted: 2004-04-16 17:39:00
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I had a hamburger at burger king as always. I eat there like three times a week and the rest of the days i am having a pizza slice from peppes.
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Posted: 2004-04-16 17:47:27
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