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astronauts eat rubber ducks?
the things you learn on esato...
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Posted: 2004-04-15 15:49:46
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No you crazy hollander, they play with them in the tub, you ARE allowed some luxuries in space you know.
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Posted: 2004-04-15 15:55:00
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Pizza for me!!
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Posted: 2004-04-15 15:56:18
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how does the water stay in the tub??
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Posted: 2004-04-15 15:57:44
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@soichiro i am not a big fan of those fast food stories. i prefer a good soup, some meat with garnish and a small dessert. for that money i get it here in a cheap restaurant.
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Posted: 2004-04-15 15:58:31
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Quote:
On 2004-04-15 15:57:44, Vlammetje wrote:
how does the water stay in the tub??
good question!
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Posted: 2004-04-15 16:00:41
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hehe lol... a microwave burger from tesco's! lol
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Posted: 2004-04-15 16:19:32
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Nothing exciting for me... just some cheese on toast (cooked by my own fair hand!) pack of crisps and a Snickers choccie bar!
No rubber duckies though
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Posted: 2004-04-15 16:24:46
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Vlammetje your ignorance dissuades me from continuing my life, and general interaction with humans. Clearly, as you have never been in space, i shall be forced to explaining this to you. One of Newton's basic laws of physics states that an object (be it a planet, a molecule, or quantum particle) shall retain a state of rest, unless an outside force is applied to it. (When i say rest, i mean that it will retain its momentum, without change in energy or spacial vectors). Now consider a bathtub full of water molecules. These molecules will see no force acting on them which will cause them to exit the tub. "ah" you may say, "but water, being liquid, already has enough energy in its molecules to cause them to simply expel from the surface of the liquid and fly of into the room" Well yes, that would be the case, if it wasnt for SURFACE TENSION. See, this is why the moon has no atmosphere. A gas molecule of say, nitrogen, moves around with a velocity which actually exceeds the required velocity to escape the gravitational field of an object (escape velocity) the size of the moon, so it will just fly off into space. In order for a planet to retain its atmosphere, it must have enough mass to have a gravitational field- and therefore escape velocity- strong enough to exceed that of the velocity of the particles moving around within that gas. Now back to our bathtub, people think theres no gravity in a near earth orbit. Wrong. There is almost as much gravity as there is at ground level. If there were no gravity, the spacecraft wouldnt stay in orbit, it would just peel off into outer space. Its the fact that the craft, and everything in it, including our bathtub and water molecules, are in FREEFALL. This creates an EFFECT of weightlessness, which is a situation with properties similar to complete weightlessness, which of course, cannot exist in a universe which contains mass. NOW, since we are in a bathtub filled with water in what we can consider a weightless environment, it does become apparent that the water molecules would have enough momentum to escape. However, the attractive bond exhibited by water molecules at the surface of the liquid, creates a 'skin' on the surface which prevents the molecules escaping, almost like a sheet of cling film over the top. This whole system, unfortunately, will be thrown into complete turmoil if our astronaut splashes around too much. So yes, the water will stay in the tub, but you have to be careful if you want to keep it there. Thanks for your attention, i hope we have all learned something here today.
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Posted: 2004-04-15 16:55:00
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we have.
Can we move on to lesson 2 now?
Assuming the rocket did not launch with a tub filled with water on board (bit of a bumpy ride going through the atmosphere with thrusters on and such...... how does the astronaut fill the tub whilstin space?
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Posted: 2004-04-15 18:51:36
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