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

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§. 12. Prouti in proximo paragrapho determinavimus quantitates ut-
ut
infinite parvas, deſcenſus aquæ internæ uti &
effluentis aquæ dum maxi-
ximum
velocitatis gradum aqua attingit, ita nunc idem præſtabimus ratione
tempusculi
.
Dico eutem ſufficere in æquatione §. 10. tempus exprimente,
ut
in utraque ſerie unicus accipiatur terminus primus, quod apparebit cum
quis
calculum ad duos extenderit terminos:
eſt igitur tempuſculum quæſi-
tum
ſive
t
= (2 - 2√{x/a}) X {(mmαα - 2nn).
a/n}
hinc
poſito pro x valore huc pertinente, qui in præcedente paragrapho fuit
definitus
, fit
t
= [2 - 2√1 - (log.
{mmαα/nn}): {mmαα/nn}] X ({mmαα - 2 nn/nn})·a
vel
poſito 1 - (log.
{mmαα/nn}): {2mmαα/nn} pro reſpondente quantitate ſigno ra-
dicali
involuta prodit
t
= [(log.
{mmαα/nn}): {mmαα/nn}] X ({mmαα - 2nn/nn})·a}
aut
denique rejecta quantitate 2 nn in ſigno radicali, oritur t = {2n√a/}.
log. {/n}.

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