REFLECTOR:RE:weak gas struts
Al Gietzen
reflector@tvbf.org
Thu, 1 Jan 2004 22:47:28 -0800
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The movement you see when you do this is a result of the small amount of
air
foreword of the plunger (yes it is small, but it is there- if you fill
the
syringe up with oil, make sure all of the air is out, then repeat the
experiment, it will not move.
=20
Well; it may be a hard mental concept, but, of course, it will move. It
will form a vacuum. A pure vacuum is when there is nothing there, so no
molecules are needed. You could take all the fluid out, make it clean,
and weld the end shut, if you pull the cylinder by at least the piston
area x atmospheric pressure (which is on the other side of the cylinder)
the cylinder will move and leave a vacuum in it=92s place.
=20
So, as I think I estimated a number of postings back, if it=92s about 1 =
=BD=94
dia, the force required is 40-45 lbs.
=20
Al
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<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>The
movement you see when you do this is a result of the small amount of =
air</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>foreword
of the plunger (yes it is small, but it is there- if you fill =
the</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>syringe
up with oil, make sure all of the air is out, then repeat =
the</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>experiment,
it will not move.</span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack face=3DNimrod><span
style=3D'font-size:11.0pt;color:black'> </span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'>Well; it may =
be a hard
mental concept, but, of course, it will move.=A0 It will form a =
vacuum.=A0 A pure vacuum
is when there is nothing there, so no molecules are needed.=A0 You could =
take all
the fluid out, make it clean, and weld the end shut, if you pull the =
cylinder
by at least the piston area x atmospheric pressure (which is on the =
other side
of the cylinder) the cylinder will move and leave a vacuum in it’s =
place.</span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'> </span><=
/font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'>So, as I =
think I
estimated a number of postings back, if it’s about 1 =BD” =
dia, the
force required is 40-45 lbs.</span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'> </span><=
/font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'>Al</span></fon=
t></p>
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