From: nospam@nospam.no.retro.com   
      
   > Hello,   
   > I have a small problem which I initially thought would be fairly easy to   
   > work out.   
   > Given a rocket or mass M ejecting as its exhaust a mass stream at a rate m,   
   > and energy is imparted into this mass at a rate (power) of P, is it possible   
   > to calculate the acceleration of the rocket? Or is it necessary to to have   
   > the ejection velocity of the mass?   
   > Is it also possible to derive the specific impulse of the fuel from this   
   > information?   
   >   
   > Thank you ~   
      
    P=(1/2).m.((g0.Isp)^2)            g0= 9.81 m/s2   
    M.acceleration = m.g0.Isp    (in vacuum, no gravity)   
      
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