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suppose there was an earth sized watermelon?
i know such a thing is not possible of ever existing, but suppose...
with a snap of a finger, planet earth turned into a giant watermelon. what would happen? this is my prediction. tell me if you think i'm right. gravity would immediately collapse the watermelon and the center would turn very hot due to the sheer pressure of the damn thing. as the watermelon collapses, the liquid in the melon would burst out of the cracked rinds and evaporate into gas. planet melon would keep shrinking and shrinking until all the water boiled and evaporated and only bits of burnt rinds would remain which would then drift off into space like asteroids. the question is would there be something like a planet of liquified watermelon gas(mostly H20, i guess). i don't think so. i think for there to be a gas planet, there has to be much more gas. that probably means a jupiter sized watermelon, upon collapsing would have enough gaseous matter to wield some kind of gravitational power over the gas and hold it together. but earth is just too small. can anyone create a computer model of this? |
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"neurocratic malfunction" wrote in message om... i know such a thing is not possible of ever existing, but suppose... with a snap of a finger, planet earth turned into a giant watermelon. what would happen? It would think to itself "Oh no, not again." If we knew exactly why the watermelon thought that, we would know a lot more about the nature of the universe than we do now. |
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neurocratic malfunction wrote: i know such a thing is not possible of ever existing, but suppose... with a snap of a finger, planet earth turned into a giant watermelon. what would happen? this is my prediction. tell me if you think i'm right. gravity would immediately collapse the watermelon and the center would turn very hot due to the sheer pressure of the damn thing. So far so good. as the watermelon collapses, the liquid in the melon would burst out of the cracked rinds and evaporate into gas. A naive misconception. This is like saying that the water at the bottom of the ocean is under such pressure that it will come shooting to the top in great geysers. planet melon would keep shrinking and shrinking until all the water boiled and evaporated and only bits of burnt rinds would remain which would then drift off into space like asteroids. It would shrink into a hot ball of Hydrogen and Oxygen, at least. I'm not sure if water would retain its molecular form at the center. One thing is for sure, at those conditions there is no distinction to be made between a gas and a liquid. Usually its called a gas. Note that at the center of the sun, the density is far greater than any metal - about 100 g/cc I believe. The atoms themselves are squished out of existence so that the protons zing around in a sea of electrons. The watermelon planet wouldn't go that far, but I'm not sure what kind of conditions there would be. Certainly, the whole thing could get hot enough so that it could lose gas from the surface. the question is would there be something like a planet of liquified watermelon gas(mostly H20, i guess). i don't think so. i think for there to be a gas planet, there has to be much more gas. Not at all. You have it starting from a diffuse state, ( i.e. a watermelon ) so that it would gain a tremendous amount of heat on collapsing, and probably would lose some mass. Starting from a liquid water state, it would still compress and get hot, but much less so. that probably means a jupiter sized watermelon, upon collapsing would have enough gaseous matter to wield some kind of gravitational power over the gas and hold it together. but earth is just too small. can anyone create a computer model of this? Some years ago, I made some notes on a gravitationally self-bound gase - a gas planet. I think I was inspired by the cloud planet in Star Wars. You do get tremendous compression at the center, so you have to know the equation of state ( i.e. the behavior ) of the gas under these extreme conditions. I don't think you have to worry about the thing automatically self-dissipating though. The compression won't "rebound". The heat is associated with the pressure that slows the collapse. As the heat dissipates, the collapse progresses. For planet sized objects, you can easily end up with a low temperature body ( after eons of cooling ) which nevertheless can sustain the pressure at the center, and this goes for a water planet as well. Oh yeah, I once calculated that if the earth were changed into TNT, and detonated, the detonation would not release enough energy to overcome the gravitational binding energy. The detonation products would remain self-bound. Gravity rules at this scale. .... I'm glad to see you've turned your mind to something productive. Lew Mammel, Jr. |
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On Thu, 18 Nov 2004 12:47:22 +0000, Gerry Quinn wrote:
(Note that the Earth's rocks are already compressed, though water would compress more. Isn't the basis of hydraulics that water isn't really compressible? Though it might become solid after a certain amount of pressure, presumably. -- Karim Rashad remove SPAMFREE: krashad at SPAMorbisFREEuk dot com |
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"Karim Rashad" wrote in message
news On Thu, 18 Nov 2004 12:47:22 +0000, Gerry Quinn wrote: (Note that the Earth's rocks are already compressed, though water would compress more. Isn't the basis of hydraulics that water isn't really compressible? The basis of hydraulics is that water isn't VERY compressible and can be thought of in gross terms as incompressible. Google: Compressibility Water Though it might become solid after a certain amount of pressure, presumably. -- Karim Rashad remove SPAMFREE: krashad at SPAMorbisFREEuk dot com |
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:: (Note that the Earth's rocks are already compressed, though water
:: would compress more. : Karim Rashad : Isn't the basis of hydraulics that water isn't really compressible? There's compressible, and then there's compressible. Depends entirely on how much compressure is applied. At the scale of the weight of a planet, water compresses into Ice V or something. At the scale of several solar masses in the space occupied by earth, EVERYthing compresses. So, if water compresses when you set a planet on it, can Superman (one of the older, stronger versions rather than the solar powered wimps that have been in favor lately) squeeze a handfull of water to produce Ice N ? If not, and if the reason why not is that the water would squirt out between his fingers, then why *can* he make diamonds, since at those pressures similar things apply to carbon. Wayne Throop http://sheol.org/throopw |
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"neurocratic malfunction" wrote in message
gravity would immediately collapse the watermelon and the center would turn very hot due to the sheer pressure of the damn thing. Wouldn't happen. Would be eaten long before by a Jupiter sized mutant killer goat bee. Karl Johanson |
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Gerry Quinn wrote in message .. .
My guess is that the core of the Earth would convert into a form of Ice that is stable at relatively high temperatures and pressures (there are about nine known forms of ice, all but one denser than water and stable only at pressure). You mean that some-one really has discovered ice-nine ? Cheers, Nigel. |
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