How does jet propulsion work?

Subject: How does jet propulsion work?

Date: Fri Jul 27 09:00:55 2001
Posted by Mike
Grade level: nonaligned School: No school entered.
City: Dordrecht State/Province: No state entered. Country: Netherlands
Area of science: Physics
ID: 996238855.Ph

Message:


In a discussion with a collegue we argued about the physics behind jet 
propulsion. The topic was: could a jet engine work in the vacuum of space. 
Arguments for no: a jet engine expands air by (over)heating it, and thus needs 
it not only for combustion. Arguments for yes: If oxygen was supplied for 
combustion the engine would work on an impuls energy principle.
Could you please explain the workings, even though i am over 18 ;-)
P.s. Haven't found the answer in your archives (surprisingly)

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