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[PCMag] Why Is the Earth So Hot? Radioactivity Is Half the Answer

post #1 of 33
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Why Is the Earth So Hot? Radioactivity Is Half the Answer


Quote:
Originally Posted by Peter Pachal
Scientists have long believed that the heat is probably from two major sources: "primordial" heat that's left over from the earth's fiery formation, and radioactive decay. Now, thanks to the study, they can put an amount on the latter source, with radioactive decay accounting for about 23 terawatts. The models suggest that all of this radioactive heat comes from the crust and mantle, since the heart of the planet is thought to contain only substances that are friendly to the nickel-iron core.

Who wants one of those ships from The Core so you can see what's really down there?
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post #2 of 33
How many other planets have molten cores?
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post #3 of 33
O will take two lol
 
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post #4 of 33
Quote:
Eight terawatts were from uranium, eight are from thorium, and four are from potassium.
thats bananas!

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post #5 of 33
When we burn this planet to teh ground and reap it of its resources, we will move to another planet. But i guarentee you someone will blow a hole to the center and extract the core simply for its metal
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post #6 of 33
I thought the sun ray is the main heat source, on the surface at least.
    
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post #7 of 33
Quote:
Originally Posted by DuckieHo View Post
How many other planets have molten cores?
Does our planet even technically have a molten core since the inner core is supposedly a solid?

Edit:

I wonder if this article will end up shedding some light on the inner workings of the Earth?

http://www.overclock.net/technology-...-built-us.html
Edited by Kirmie - 7/20/11 at 9:04am
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post #8 of 33
Quote:
Originally Posted by Kirmie View Post
Does our planet even technically have a molten core since the inner core is supposedly a solid?

Edit:

I wonder if this article will end up shedding some light on the inner workings of the Earth?

http://www.overclock.net/technology-...-built-us.html
Some planets (and most moons) have complete solid cores, right?
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post #9 of 33
Quote:
Originally Posted by DuckieHo View Post
Some planets (and most moons) have complete solid cores, right?
From what I know yes. All the way through solid for a lot of moons. Its moons like Io and Europa that seem to be rare and have any liquid type of internal structure at all though not necessarily the core itself.
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post #10 of 33
Quote:
Originally Posted by Zen00 View Post
Why Is the Earth So Hot?
Cause I'm here!


Haha, Anyways, Does that mean the earth will become un-habitable after awhile of Radiation build up and such?
   
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