Quote Originally Posted by Niya View Post
E=MC^2 can explain some of this. Mass in general can be converted to a significant amount of energy. Presumably, Iron Man has some fissionable substance like Uranium to power his suit.

To me, SpiderMan is one of the most plausible super heroes. Real spiders create a fantastic amount of webbing considering their body mass. Even the human intestine I believe is two miles long or something. There are certain things you can fit a lot of into a small volume of space.
Energy doesn't move much of anything. All we use that for is moving some kind of mass, whether air, water, or rotating solids. None of those apply to Iron Man.

As for spiders creating a fantastic amount of silk, that's just protein that has to carry darn near no weight. It is created, and reasonably fast, but nowhere near the speed suggested by Spiderman. He's supposedly shooting a VERY strong, reaonably heavy substance (try throwing a feather) on a flat trajectory for a very long distance at a very high speed. Even assuming that the stuff weighed less than an ounce per meter, which would mean that it would be lighter and stronger than any substance known, to get the kind of distance and volume he's creating would mean significant recoil and a HUGE expenditure in weight. Also, unless the stuff evaporated (also like nothing known), he'd be entombing a city at the rate he's going.

By the way, you might want to check on the length of the intestine, though I'd have to say that it took a lot of guts to make the claim that you did.