The gas flows from higher concentration/pressure to lower concentration/pressure, which is outside the ball.
The answer is 2.7gm/cm^3 . Density is mass divided by volume .
i speak english . gracias!
It is because in that time science was not established. This is, the experimentation to test hypotheses, which is a fundamental part of the scientific method, was not applied.
Atoms can not be seen, then they could only reflect or philosophize on this matter. This method is not able to give good answers to so complicated scientific matters.
