Originally posted by jimslyp69
If the rocket is accelerating then won't all the air be forced towards the tail end of the rocket by the acceleration which is afterall a force, just like gravity. The helium being lighter will have less weight and therefore be displaced by the heavier 'breathable atmosphere'. So the ballon will rise, just as it would in the Earth's atmosphere.
you got it! you have to realize what causes the balloon to rise, differance in air density, most dense in the direction of the rocket
and less dense in the other direction, like a watermelon seed squirted
out of your finger, if goes "up", in this case, away from the rocket.
And then the other fact figured out by Einstein is the equivalence of
gravity and acceleration, if you are in a closed box with no instruments
you can't tell if you are in a gravity field or an acceleration field.
Mephisto may have been saying the same thing, it may be just
a matter of semantics.