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#126 - anonymous (03/19/2013) [-]
Too lazy to log in, but I'll only vote the one time, I promise!

I'd have to go with Earthbending. Now, here me out, it's more than just a "because it's cool." I've held this discussion before, and I've thought this through.
So, let's start with some basics: Through the series, a few things have been determined / shown. First, obviously, an earthbender can learn to bend metal as well, with training. That's already pretty awesome. Second, it has been shown, at least with the other benders, that one can control the temperature of the medium they are bending, whether making a colder burn, upping a flame's intensity, freezing water, or shooting steam at someone. If the other benders can do this, then, why can't an earthbender? Now, what is super-hot rock / metal called again? Oh, right, LAVA. If an earthbender has temperature control, and it is as instantaneous as the other benders, they can almost instantly generate, and fling around, globs of molten rock and iron.
#140 to #126 - anonymous (03/19/2013) [-]
Melting point of rock is about 1400K, rounded. Gotta take it from about 300 K up there. Specific heat for lava is .84 KJ per K per Kg. Do the math, you need about 900 KJ per Kg of rock to make it turn to lava, PLUS the heat of fusion.

Compare that to water or air. Using 4 for the specific heat of water, It would take one third of that to make steam from water at the same temp.

To make fire, we'd have to assume that combustion is taking place, requiring very little energy input. But for simply heating up the air, it using 1 as specific heat of nitrogen, it would take one tenth of that to make the air scald someone.

A human in peak condition can only put out about 400 watts during rigorous excersize. If you were a proffesional athlete earth bender, it would take you about 2250 seconds of intense earthbending to make 1 Kg of lava.

So no, you ain't making lava with your earth bending.
#132 to #126 - anonymous (03/19/2013) [-]
Continued: *First off, hear, not here. I'm running on very little sleep, I apologize for any other typos there may have been.
So, continuing with the lava bending: why would this be any better than water or firebending's capabilities? Well, let's look at it like this: If a waterbender tries to make a wall of steam, an airbender could very quickly disperse it with a gust of wind. Likewise, a raging inferno could be put out by any bender on the premises (extinguish with water, blow out with air, or suffocate the flames with dirt). A WALL OF LAVA is a bit harder to put out. Cool it with waterbending, or airbending, and you simply need to channel a little more heat back into it. Problem solved, your deadly lava wall is back in commission.
If I wasn't an earthbender, waterbending would be a close second, because you could instantly disintegrate someone just by pulling all the water out through their cells, taking their internal water as further ammunition for bending in the process.
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