Besides arithmetical works, he wrote a treatise consisting in a collection of problems about weighing with hydrostatic a and normal balances.
We initially input turbulent velocity into the magnetized plate-shaped cloud which is in hydrostatic equilibrium between thermal pressure and self-gravity.
In a homogeneous fluid at rest, ver tical momentum conservation requires that the fluid be in hydrostatic balance.
Thus, any departure from hydrostatic balance gives rise to flow, with effectively immediate adjustment of velocity profile across the narrow gap.
It is interesting to note that the pressure is still hydrostatic but the vertical velocity cannot be neglected, as commonly assumed.
Further, we assume that the waves are sufficiently long for the hydrostatic equation to be valid.
The hydrostatic approximation leads to an underestimation of both the maximum growth rate and the wavenumber at which it occurs.
The pressure signals of figure 2 have been superimposed on each other (taking into account the difference in hydrostatic pressure) and are shown in part.