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[PCMag] Why Is the Earth So Hot? Radioactivity Is Half the Answer - Page 2

post #11 of 33
Quote:
Originally Posted by gerickjohn View Post
Haha, Anyways, Does that mean the earth will become un-habitable after awhile of Radiation build up and such?
Radioactive decay is the opposite of build up isn't it?

Besides, plates inevitably go back to the mantle eventually. As long as it is hot enough to have convection.
    
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post #12 of 33
Quote:
Originally Posted by DuckieHo View Post
Some planets (and most moons) have complete solid cores, right?
Yeah the moon has cooled off completely and is no longer volcanically active. You can see the basaltic plains through a telescope. Picture of the lunar maria:


Mars is also suspected to have a cooling nickle-sulfate inner core that will solidify. As for the other 2 inner-planets Mercury has a liquid iron core and Venus is unknown although suspected to be liquid nickel-iron. The outer-planets are just gas giants.
Edited by PoopaScoopa - 7/20/11 at 12:01pm
post #13 of 33
Quote:
Originally Posted by robwadeson View Post
I thought the sun ray is the main heat source, on the surface at least.
It is - they are talking about only the heat that comes from the earth itself.

Interestingly, the total electric consumption worldwide in 2008 was 143 TWatts. So we are using about 3 times as much electricity as equivalent heat that comes from the earth's center.
post #14 of 33
The actual center of the earth is solid, though theres a pretty damn thick layer around it that is molten....
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post #15 of 33
Do yall think that the increased background radiation from fukashima has anything to do with this hot summer?
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post #16 of 33
all this talk just reminds me of
post #17 of 33
All I know is it's freaking out hot here in N. IL at 102F,
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post #18 of 33
Quote:
Originally Posted by finalturismo View Post
Do yall think that the increased background radiation from fukashima has anything to do with this hot summer?
You do realize that the Fukashima plant was emitting MORE heat when it was working right?
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post #19 of 33
Also interesting:

The earth receives about 174 petawatts of solar electricity (aka, heat), from the sun. Approximately 30% is reflected back to space while the rest is absorbed by clouds, oceans and land masses.

Source: wikipedia.

So the amount of heat that makes its way through the earth's crust is equivalent to 0.019% of the heat that reaches earth from the sun.

Why are we concerned with this again?
post #20 of 33
How much escapes into the void of space? Oh that darn global warming....Ha ha I get it now. Al Gore, who invented the Internet, was right... Damn.
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Overclock.net › Forums › Industry News › Technology and Science News › [PCMag] Why Is the Earth So Hot? Radioactivity Is Half the Answer