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REPORT ABUSIVE REPLY
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Message Subject
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Rockets need an atmosphere to propel
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Poster Handle
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Balance242 |
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Post Content
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Rockets have a combustion chamber with tons of pressure, all of this pressure is forced to exit in one general direction out the nozzle.
This mass of this gas would naturally expand in all directions if it wasn't forced out in one direction.
It's this forcing out of the gas in one direction that propels the rocket.
If this doesn't convince you then nothing will.
Quoting: ParadoxicalExistence Then why is no force on the scale? Pressure in the pipe is forced out in one general direction. What is your point? The pressure in the pipe is pulled out via a pump, the pipe isn't doing any work. A better experiment would be to put a pressurized pipe inside a vacuum, then open a valve to release the air in the pipe. The vacuum creates an area of low pressure at the hose. Lear how a vacuum works. [ link to www.quora.com (secure)] The higher pressure in the pipe moves towards low pressure caused by the vacuum cleaner. Similarly combustion creates high pressure and that pressure must move into the vacuum of space.
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