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/sci/ - Science & Math

File: 5 KB, 263x264, Water-Planet.jpg [View same] [iqdb] [saucenao] [google]

Anonymous Mon Oct 18 21:11:10 2010 No.1916558 [Reply] [Original]

How would a planet made entirely of water be?

Would it have a nucleus and all that? Could you be able to see right through it?

>>	Anonymous Mon Oct 18 21:13:10 2010 No.1916567 The water would make a surface once the pressures got high enough. Not that we'd be able to handle that pressure.

>>	Anonymous Mon Oct 18 21:15:10 2010 No.1916579 Like Saturn, it would have a gassy water vapor atmosphere and in the middle it would be ice because of the gravity of the planet when you crush water down hard enough it turns into ice like the ice cubes you may have in your freezer.

>>	Anonymous Mon Oct 18 21:16:10 2010 No.1916590 >>1916567 Roughly what amount of pressure is that, in psi?

>>	снайпер Mon Oct 18 21:18:10 2010 No.1916597 >>1916567 I think what he means is that at a certain depth, the water will become a solid due to the immense pressure.

>>	Anonymous Mon Oct 18 21:20:10 2010 No.1916610 >Could you be able to see right through it That's an interesting question. If it had no impurities and no dissolved gases and no water vapour or ice, it would act as a lens.

>>	Anonymous Mon Oct 18 21:28:10 2010 No.1916650 yall r stooped, id threw sum koolaid in that shit. drink up yall HAHA

Anonymous Mon Oct 18 21:32:10 2010 No.1916668

>>1916610

I had an understanding that water had a teal color visible in big volumes, and light wouldn't get past it at certain depths - same reason why abyssal depths are light deprived. Maybe it would be a teal or really dark planet? I mean not considering the water vapor.

>>	Anonymous Mon Oct 18 21:34:10 2010 No.1916678 >>1916610 >>1916610 see the fucking ocean for fuck's shake! it's not due to impurities but depth

Anonymous Mon Oct 18 21:38:10 2010 No.1916700

>How would a planet made entirely of water be?

Wet?

>Would it have a nucleus and all that?

The core would be pressure-formed ice. Not to be confused with the naturally frozen variety, it may be quite hot from the compression.

>Could you be able to see right through it?

Can you see through to the bottom of the ocean?
No, the light would be absorbed before making it all the way through the planet.

>>	Anonymous Mon Oct 18 21:59:10 2010 No.1916791 Isn't ice less dense than liquid water? Doesn't that mean that it wouldn't turn solid at high pressure?

>>	Anonymous Mon Oct 18 22:02:10 2010 No.1916802 File: 24 KB, 722x480, phase.gif [View same] [iqdb] [saucenao] [google] >>1916791 There are several phases of solid water that have different properties, there's even an ice IX.

>>	Anonymous Mon Oct 18 22:03:10 2010 No.1916806 >>1916791 pressurized ice has significantly different properties

>>	Anonymous Mon Oct 18 22:05:10 2010 No.1916818 >>1916806 >>1916802 >>1916806 >>1916802 >>1916806 bridgmanmind!

>>	Anonymous Mon Oct 18 22:05:10 2010 No.1916814 File: 13 KB, 200x281, 1285111087742.jpg [View same] [iqdb] [saucenao] [google] >>1916802 Never think of water the same again.

>>	Anonymous Mon Oct 18 22:07:10 2010 No.1916829 So the core of the planet would be Ice XI?

>>	Anonymous Mon Oct 18 22:21:10 2010 No.1916901 >>1916678 >mfw you know nothing about the lighting spectrum >mfw only the sun's long, blue wavelengths can hit the deeper depths of the ocean >mfw this is why the ocean is blue >mfw mfw

>>	Anonymous Mon Oct 18 22:24:10 2010 No.1916923 >>1916802 OP here. Thanks for that graph bro. Mind = BLOWN

Anonymous Mon Oct 18 22:37:10 2010 No.1916992

Would the water tend to be very stable except for the tides because there are no obstacles to push them or would the water be very wild because there are no obstacles to stop them?

Basically my question is: is the effect of continents on a planet like Earth to PUSH water with the momentum of rotation or to SLOW it down?

>>	Anonymous Mon Oct 18 22:38:10 2010 No.1916998 File: 104 KB, 450x300, 1284599615172.jpg [View same] [iqdb] [saucenao] [google] >>1916901 >mfw he has no face.

>>	Anonymous Mon Oct 18 22:43:10 2010 No.1917014 >>1916901 >still implying that a waterball of planetary proportions would be transparent while trying to sound smart

Anonymous Mon Oct 18 23:55:10 2010 No.1917411

>>1916829
I don't know, I'm bored of messing with the math to figure out how much pressure would be exerted by a mass of water that had the same surface gravity as earth.

I suppose it would be simpler if I didn't take the density to vary with depth, but that doesn't feel right.

Anonymous Mon Oct 18 23:59:10 2010 No.1917426

>>1916802

Yeah, I remember the first time I saw the phase diagram for water. The first thing that came to my mind was: "there are different types of ice, more than 11 of them!". Oddly enough nobody in the class seemed to have given a hoot about it.

Damn premeds...I has a sad now.

>>	Anonymous Tue Oct 19 00:00:10 2010 No.1917431 >>1917426 many, if not most, solids have more than one crystal structure.

Anonymous Tue Oct 19 00:05:10 2010 No.1917448

>>1917431

I know that now, in fact, it is rare for a solid only to have a single crystal structure (is there even such thing?) at all pressures and temperatures. However, for my STP conditions mind, Ice 1,2,3.... was enough to find my ignorance both appalling and mindblowing.

>>	Anonymous Tue Oct 19 00:10:10 2010 No.1917473 Ice-nine brings the end, the end I tell you!

>>	Anonymous Tue Oct 19 00:11:10 2010 No.1917479 >>1917448 yeah, I don't know, it seems like it should be possible that something with a close packed structure under low pressure conditions might not have any other solid phases. But I don't know any examples.

Anonymous Tue Oct 19 00:17:10 2010 No.1917503
File: 391 KB, 622x656, 1286914857864.jpg [View same] [iqdb] [saucenao] [google]

>>1916579
liquid water is more dense that solid ice so no, the core would not be solid.
http://en.wikipedia.org/wiki/Ice
"The density of ice is 0.9167 g/cm³ at 0°C, whereas water has a density of 0.9998 g/cm³ " (2nd paragraph under characteristics)

>>	Anonymous Tue Oct 19 00:20:10 2010 No.1917521 >>1917411 I really think I should have taken fluid dynamics.

>>	Anonymous Tue Oct 19 02:04:10 2010 No.1918038 >>1917503 idiot

>>	Anonymous Tue Oct 19 02:07:10 2010 No.1918050 >>1916558 >nucleus You use that term, but you do not know what it means.

>>	Anonymous Tue Oct 19 02:08:10 2010 No.1918054 >>1916558 Can you see through the bottom of the ocean to the floor past 100 ft? Almost never.

>>	Anonymous Tue Oct 19 02:10:10 2010 No.1918058 File: 49 KB, 446x400, laughingirls.jpg [View same] [iqdb] [saucenao] [google] >>1917503 >he thinks there is only one crystalline form of ice

Anonymous Tue Oct 19 02:17:10 2010 No.1918086

>>1917521

I know this is just a minor point:

a ball of water in the simplistic view under discussion here does not undergo any dynamic behavior.

it is in equilibrium.

therefore you would want to study "hydrostatics"

true, a realistic model of such a concept would require hydrodynamics, but not a simple model of a ball of water to determine the core pressure.

>>	Anonymous Tue Oct 19 02:18:10 2010 No.1918094 >>1918086 Quite correct, but there was no hydrostatics course offered.

Anonymous Tue Oct 19 02:22:10 2010 No.1918108

not sure if this applies to water....

but a simple statistical mechanical model is actually applicable to the atmosphere.

gravitational potential energy = mgZ (z = height)

the gauge pressure is proportional to the relative populations at different heights

N(z)/N(0) = e^(-mgz/kt)

source ML Salby, Fundamentals of Atmospheric Physics (From my statistical mechanics undergraduate text: Molecular Driving Forces)

>>	Anonymous Tue Oct 19 02:23:10 2010 No.1918111 >>1918094 hydrostatics was taught in the 2nd quarter of my 5 quarter general physics series

>>	Anonymous Tue Oct 19 02:23:10 2010 No.1918109 http://en.wikipedia.org/wiki/GJ_1214_b hs some data on it

>>	Anonymous Tue Oct 19 02:25:10 2010 No.1918120 File: 10 KB, 264x191, js..jpg [View same] [iqdb] [saucenao] [google] >How would a planet made entirely of water be? Jet ski heaven

>>	Anonymous Tue Oct 19 02:27:10 2010 No.1918125 >>1918111 well I had a two semester general physics series, and we sorta completely ignored anything regarding fluids. There was an elective course on fluid mechanics offered but I never took it.

>>	Anonymous Tue Oct 19 02:27:10 2010 No.1918126 >>1916818 ...brennan?

>>	Anonymous Tue Oct 19 02:48:10 2010 No.1918216 >>1918108 mgh is a simplification that breaks down over the width of a planet, especially when you're inside the bulk of the mass, but thanks for trying.

>>	Anonymous Tue Oct 19 14:23:10 2010 No.1920101 File: 42 KB, 400x500, bowie-david-photo-david-bowie-6230855.jpg [View same] [iqdb] [saucenao] [google] Ice-ice, baby.

Anonymous Tue Oct 19 14:31:10 2010 No.1920135

Within the radioactive decay provided by the rocks in earth's interior, a water made out of water wouldn't produce its own heat. At its core there would be tremendous amount of pressure, whether or not it turns to ice would also depend on the temperature, and that would depend on its distance from its sun. A planet made out of water might end up circulating very well.

>>	Anonymous Tue Oct 19 14:43:10 2010 No.1920187 you couldn't see through it. Just look at teh sea. There would lots of ice too, since the nucleus wouldn't be hot. anyway it

>>	Anonymous Tue Oct 19 14:46:10 2010 No.1920206 >>1920135 >a water made of water So water is now the hardest metal known to man?

>>	Anonymous Tue Oct 19 14:47:10 2010 No.1920210 >>1918108 That formula is only useful where g can be treated as a constant. On any large scale it is a function of z.

>>	Anonymous Tue Oct 19 14:48:10 2010 No.1920216 >>1920135 It doesn't depend on the temperature. Water under planetary pressure would be solid regardless of temperature. See the phase diagram ITT.

Anonymous Tue Oct 19 14:52:10 2010 No.1920233

the first time i got high i asked my friends this question and we talked for nearly an hour about it. In the end we decided that we would live in rock inside of the waterworld and if a big asteroid hit it it would look cool as fuck. Damn i love being high

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