Fire Definition and 306 Threads

http://www.kansas.com/mld/eagle/news/local/5236426.htm

Has anyone seen St. Elmo's fire, also known as corona discharge in everyday life? I've seen in it a lab demonstration but I'm curious what it actually looks like in the real world and how common it is. If you model a ship's spar as a long perfectly conducting cylinder then by solving...

This may be a stuppid question. I don't really care though. I really am haveing hard time understanding what fire is? The flame of light. There are certain things I know, like it needs fuel and oxygen and heat to start. Once it is started it will just live on its own until something runs out...

A person jumps from a fourth story window 15 m above a safety net. THe jumper stretches the net 1.0 m before coming to rest. What was the deceleration experienced by the jumper? Equation: x = x0 + v0t +.5at^2 15 m = 1 m + 8.6 m/s(2s) + .5(a)(1.75s^2) 15m = 1 m + 17.2 m/s^2 +...

Now, just so you know, all aircraft allied with the USA are sending out an IFF signal which a radar operator can not miss unless he/she is not paying any attention at all.

First let's work our way up. 1. For a fire to start, oxygen has to be present, yes? 2. There is no oxygen in space(vacuum), yes? Since they are surrounded by vacuum, they have absolutely no way to obtain the oxygen to support combustion. Then how is it that the Sun and stars can burn...