![]() ![]() Nice question, but incomplete, you forgot to add gravity, which there is no place in our universe with zero gravity as gravity is a field, also, the addition of time. If anyone can answer how propulsion happens in the ever expanding vacuum of space using rocket technology with math that does not conflict with the PV work formula I would like to hear the answer. ![]() free expansion therefore no gas will acculmate at the nozzle to push off or react upon as I have heard some space agencies claim. If burnt gasses come out of the nozzle (action) they will be obsorbed by the infinite vacuum of space A.K.A. If fuel and oxygen are mixed in the combustion chamber and somehow ignited the laws of free expansion eliminate any work from being performed and therefore no thrust happens because there is no external resistance/pressure to get an opposite and equal reaction from. If I am wrong than so is the P V work formula, and please don't throw Newton's third law as an answer, without explaining where the reaction comes from because pushing off nothing makes no sense, and in a vacuum the gasses are subject to free expansion. My conclusion is rockets can not produce thrust in the supposed vacuum of space, because there is no resistance/pressure to work on. If oxygen and a combustible fuel are mixed in a combustion chamber that is in equilibrium with the ever expanding vacuum of space how can any work be done? W = P ext is 0 X any number for change in volume = zero, because any number muitiplied by zero is zero, therefore 0 work is performed. ![]()
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