Bernoulli, Daniel, Hydrodynamica, sive De viribus et motibus fluidorum commentarii

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6349SECTIO TERTIA. ubi pro noſtro caſu præſente intelligitur per v altitudo quæſita reſpondens ve-
locitati
ſuperficiei aqueæ in ſitu F, per ξ longitudo B D E F &
per x altitudo
B
G, atque per {m/n} index rationis inter amplitudines tubi &
foraminis B: Quod
ſi
vero dicatur longitudo B D A = αerit x = {ξ - α/g}, unde nunc habetur
v
= ξ{mm/nn} - 1} ſ - ({ξ - α/g}) ξ{- mm/nn}
Indicetur longitudo totius canalis B D E C per β, & erit
ſ
- ({ξ - α/g} ξ{- mm/nn} = {nnα/g(nn - mm)} (ξ{nn - mm/nn} - β{nn - mm/nn}})
{- nn/g(2nn - mm)} (ξ{2nn - mm/nn} - β{2nn - mm/nn})
atque
proinde
v
= {nnα/g(nn - mm)}(1 - ({β/ξ}){nn - mm/nn})
-
{nnξ/g(2nn - mm)}(1 - ({β/ξ}){2nn - mm/nn}).
Q. E. I.

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