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But this ↑ is mistaken. If anything, the air would be expelled faster into a lower pressure environment or vacuum, not slower.
Quote from: chiralSPOBut this ↑ is mistaken. If anything, the air would be expelled faster into a lower pressure environment or vacuum, not slower.That's precisely the case. The rate of flow is a function of the difference in pressure.
Quote from: PmbPhy on 25/01/2015 20:35:37Quote from: chiralSPOBut this ↑ is mistaken. If anything, the air would be expelled faster into a lower pressure environment or vacuum, not slower.That's precisely the case. The rate of flow is a function of the difference in pressure.No I'm afraid you are wrong again. The exhaust would just kind of be absorbed by the vacuum (alleged) of space. Low pressure is also not the same as no pressure (vacuum).
No I'm afraid you are wrong again. The exhaust would just kind of be absorbed by the vacuum (alleged) of space. Low pressure is also not the same as no pressure (vacuum).
The exhaust would just kind of be absorbed by the vacuum (alleged) of space.
ChiralSPO: I appreciate the explanation attempt however there is one problem, it's that the box would be need to constructed of such material that nothing could go through it. Many perceived impermeable materials can be penetrated by the likes of subatomic particles, light, etc. Also, if that box is truly sealed, in the absence of any compelling factor, there should be no movement because any alleged vacuum would make that an impossibility. Maybe I'm missing how this applies to either thrust in space or the existence of any vacuum.
Nowhere in the cosmos does a perfect vacuum exist. So, I'm afraid you are misinformed, or more likely, you are just being contrary and or contentious.
They stop working when there is no atmosphere at all. No atmosphere = no means of propulsion. Pretty basic actually.
AlanCalverd: They stop working when there is no atmosphere at all. No atmosphere = no means of propulsion. Pretty basic actually. Maybe your altimeter is off, possible you know
Well this should be my last post since I have been censored and singled out as an insulter when all I am doing is counter-punching.
There seems little point in discussing this further with SuS until he has answered my question: at what point, during its ascent through the atmopsphere, has he observed the efficiency of a rocket to decrease?Science is begins with data, not conjecture or analogy, and this is a science forum.