From: sylvia@not.at.this.address   
      
   Erik Max Francis wrote:   
   > Sylvia Else wrote:   
   >> Erik Max Francis wrote:   
   >>> Sylvia Else wrote:   
   >>>> So the reasonable assumption is that it's in an orbit that allows it   
   >>>> to be at 2000km at one point in time, and 800km at another.   
   >>>   
   >>> That would be my guess, too; it sounds asking what the speed of the   
   >>> satellite will be if it has a perigee of 800 km altitude and an   
   >>> apogee of 2000 km altitude.  It's a bit glib and not terribly clear,   
   >>> though.  I agree with the others that it's not a very useful   
   >>> question, especially for high school students.   
   >>   
   >> It couldn't have an apogee at 2000km, because it's going at the wrong   
   >> speed.   
   >   
   > That seems in direct contradiction to what you just said above   
   >   
   > It starts with an altitude of 2000 km, is hit by something, and ends up   
   > at 800 km altitude.  There's nothing about it ending up in a 800 km   
   > _circular_ orbit.   
   >   
      
   Also, look at David M Palmers response to the OP.   
      
   Sylvia.   
      
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