>Lastly, the GP is correct: liquid nitrogen is incredibly cheap. It's basically the cost of drinking water.
Hold on, what? How?? Reaching that temperature seems like a difficult task; and what's used as a source of pure nitrogen, anyway? Is there some clever trick to separating it out from the air?
Hold on, what? How?? Reaching that temperature seems like a difficult task; and what's used as a source of pure nitrogen, anyway? Is there some clever trick to separating it out from the air?