This is an approximate equation, but holds with good accuracy.
2.
The distinction is that the " empircal law " is an approximate equation based on observations for a particular experimental setup.
3.
A high specific thrust engine has a high jet velocity by definition, as the following approximate equation for net thrust implies:
4.
"Fowler Nordheim-type equations " are a family of approximate equations derived to describe CFE from the internal electron states in bulk metals.
5.
Some flight planning systems use elaborate systems of approximate equations to simultaneously estimate all the changes required; this can greatly reduce the number of iterations needed.
6.
Approximate equations are necessary because, for physically realistic models of the tunneling barrier, it is mathematically impossible in principle to solve the Schr�dinger equation exactly in any simple way.
7.
Therefore, the significant terms near the origin under this assumption are only those lying on the line and the others may be ignored; it produce a simple approximate equation for the curve.
8.
There may be several such diagonal lines, each corresponding to one or more branches of the curve, and the approximate equations of the branches may be found by applying this method to each line in turn.
9.
This has a nice discussion of predicting the total flow rate through a circular pipe for a turbulent Newtonian liquid, and gives an approximate equation : volume flow rate = 49 * pi * radius ^ 2 * ( maximum speed ) / 60.
10.
This is an approximate equation that is derived from the incompressible Navier Stokes equations ( written in spherical coordinate system ) and describes the motion of the radius of the bubble " R " as a function of time " t ".
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