Many flamethrowers use compressed flammable gas, which flows from the special tank to the end of the gun, where it is ignited by spark plugs. This creates a small flame, which ignites the flowing fuel.
But why a flamethrower needs a tank with compressed gas? Can the fuel be ignited just only...
This video [http://www.youtube.com/watch?v=7Mz2laHjVoQ] explains the mechanism behind aurorae, but i need some clarifications:
1) Is it true that aurorae can be produced only by some ejecting chunks of plasma and NOT by solar wind (flow of particles)? If not true, then how solar wind can...
I want to clarify some stuff about black holes and have some questions:
1) From the perspective of a hovering near the event horizon observer an external universe evolve at very fast rate. But from the perspective of a free falling observer an external universe slows down. Correct?
2) If...