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Hydrostatic paradox

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Paradox \Par`a*dox\, n.; pl. {Paradoxes}. [F. paradoxe, L.
   paradoxum, fr. Gr. ?; ? beside, beyond, contrary to + ? to
   think, suppose, imagine. See {Para-}, and {Dogma}.]
   A tenet or proposition contrary to received opinion; an
   assertion or sentiment seemingly contradictory, or opposed to
   common sense; that which in appearance or terms is absurd,
   but yet may be true in fact.

         A gloss there is to color that paradox, and make it
         appear in show not to be altogether unreasonable.
                                                  --Hooker.

         This was sometime a paradox, but now the time gives it
         proof.                                   --Shak.

   {Hydrostatic paradox}. See under {Hydrostatic}.

Hydrostatic \Hy`dro*stat"ic\, Hydrostatical \Hy`dro*stat"ic*al\,
   a. [Hydro-, 1 + Gr. ? causing to stand: cf. F. hydrostatique.
   See {Static}.]
   Of or relating to hydrostatics; pertaining to, or in
   accordance with, the principles of the equilibrium of fluids.

         The first discovery made in hydrostatics since the time
         of Archimedes is due to Stevinus.        --Hallam.

   {Hydrostatic balance}, a balance for weighing substances in
      water, for the purpose of ascertaining their specific
      gravities.

   {Hydrostatic bed}, a water bed.

   {Hydrostatic bellows}, an apparatus consisting of a
      water-tight bellowslike case with a long, upright tube,
      into which water may be poured to illustrate the
      hydrostatic paradox.

   {Hydrostatic paradox}, the proposition in hydrostatics that
      any quantity of water, however small, may be made to
      counterbalance any weight, however great; or the law of
      the equality of pressure of fluids in all directions.

   {Hydrostatic press}, a machine in which great force, with
      slow motion, is communicated to a large plunger by means
      of water forced into the cylinder in which it moves, by a
      forcing pump of small diameter, to which the power is
      applied, the principle involved being the same as in the
      hydrostatic bellows. Also called {hydraulic press}, and
      {Bramah press}. In the illustration, a is a pump with a
      small plunger b, which forces the water into the cylinder
      c, thus driving upward the large plunder d, which performs
      the reduced work, such as compressing cotton bales, etc.
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