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Thread: Will the exhaust of a rocket move straightly backwards forever?

  1. #1 Will the exhaust of a rocket move straightly backwards forever? 
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    When a rocket is launched towards X direction in the space its exhaust will be spayed towards -X direction .
    None will doubt it.
    But excause me, the diffusion angle of the exhaust is not zero at all!
    The temperature of the space is about -270℃, those gas molecules scattered and moving around will be cooled into liquid and then become frozen graduately.
    Will all of the Solidified bodies move towards -X direction forver? Never escapes towards Y,-Y,Z,-Z……directions?


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  3. #2  
    Forum Ph.D.
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    no-now go back to sleep


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  4. #3  
    pmb
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    Quote Originally Posted by Emdrive View Post
    The temperature of the space is about -270℃, those gas molecules scattered and moving around will be cooled into liquid and then become frozen graduately.
    The particles will be dispersed in space, never collecting to form larger drops/bodies.

    Quote Originally Posted by Emdrive View Post
    Will all of the Solidified bodies move towards -X direction forver? Never escapes towards Y,-Y,Z,-Z……directions?
    Not all of the particles will be directed in the -z direction due to the shape of the rocket nozzle. Even those which do start out movin exactly in the -x direction they will eventually bounce off other particles and be scattered in all directions
    Last edited by pmb; June 18th, 2012 at 06:02 PM.
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  5. #4  
    Comet Dust Collector Moderator
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    The particles will follow the laws of physics.
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  6. #5  
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    Quote Originally Posted by MeteorWayne View Post
    The particles will follow the laws of physics.
    Sure.
    Not only particels but also rigids and solid objects will follow the series of laws of physics.

    All of the collisions between particles is head-on collision but not eccentric collision .
    Fortunately we are living in a multiple-type world and God had not created humans as a particle.
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  7. #6  
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    OK, trying to get this moved out of Physics?
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  8. #7  
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    Haven't you seen any kind of hollow object such as a container with some liquid inside espacially the liquid has to move in pipes ?
    Can we regard it as a kind of particle?
    Besides these you can also play a small game by yourself:
    Stand firmly in the head of a boat with a gun in your hand. Now fire towards right direction.
    Obviously the boat will rotate anti-clockwise.
    NOthing violates any physics laws here.
    But think about it carefully:
    The part of angular momentum involve the bullet relating to the center of the earth? Will it remain unchanged?

    Another item of angular momentum involve the bullet relating to the center of the sun? and around the center of galaxy? Will they keep constant forever?

    Can a guy make sure that his behaviors will never break against the laws of nations all over the world?
    For example :little marijuana?
    Last edited by Emdrive; June 19th, 2012 at 02:35 AM.
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