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GRIN....
In lugnet.off-topic.debate, Lester Witter wrote:
>
> Entering extrreme geek zone
>
> OK let's do the math
>
> every thing is metric
>
> radius of the earth = 6378137 meters
>
> figure the "core" is 1/4 radius out 1594534.25
>
> volume of core 4/3 * PI * R-cubed = 16982051976875485000 = 1.7e10^19 M^3
>
> Ignoring pressure issues and assume core 100% iron
>
> density of iron = 7874 kg/m^3
> mass of core 1.7 10^19 * 7874 * 1000g/Kg = 1.3x10e26g
>
> specific heat of iron 0.45j/g (pressure assumption effects this)
>
> joules required to raise core 1 degree C = 1.3x10e26g * 0.45 = 6.0e10^24
>
> joules in on gram of matter (assuming 100% conversion to energy)
>
> E = MxC^2 = 1x3.0x10^9 = 9e10^10
>
> amount of matter required to raise core 1 degree
>
> 1.3x10e26/9e10^18 = 1.4e7
>
> Melting point of Iron = 1538 (again pressure issues)
>
> to melt core starting at 0 C (aauming 100% heating efficieny)
>
> 1.4e7 * 1538 = 2.2e^10g or 2.2e^7 Kg or 2.2e^4 metric ton
>
> So to melt the core you would have to convert 100% to energy and apply with
> 100% efficiency 22,000 metric tons of matter, that's a lot of H-bombs
>
> End extereme geek zone
>
> Lester
This is off topic for .debate... it belongs in .geek! C'mon guys!
Now if you want to debate whether melting Mars is a good idea or not, that's
different. :-)
Personally I'm not sure it's a good idea, or necessary. There's plenty of waste
rock to build habitats out of, no need to wreck Mars just to get a magnetic
field going.
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Melting a planet's core
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| (...) Entering extrreme geek zone OK let's do the math every thing is metric radius of the earth = 6378137 meters figure the "core" is 1/4 radius out 1594534.25 volume of core 4/3 * PI * R-cubed = 16982051976875485000 = 1.7e10^19 M^3 Ignoring (...) (23 years ago, 10-Jun-03, to lugnet.off-topic.debate, FTX)
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