Ed Huntress wrote:

"Don Foreman" wrote in message
news
On Fri, 19 Oct 2007 23:26:31 -0400, "Ed Huntress"
wrote:


snip

The trouble with that is that "suction," like "centrifugal force," is not
a
term that scientists or most engineers would accept, except in casual
conversation. Suction is just the result of a lower pressure acting
differentially to a higher pressure; centrifugal force is just the effect
of
acceleration against the true force involved, which is the centripetal
force.

When I see "suction" used in a technical discussion I can accept it as a
casual term and assume that the person speaking, if he or she is
technically
knowledgeable, knows there really is no such thing as "suction," as a real
force. But I'm not used to seeing it on a test of technical subjects.

There really is no "suction." And there really is no "centrifugal force."
They're useful concepts but they aren't technically correct.

Agreed. So neither choice was technically correct, while either
response indicates that the respondent understands howitworks.


Yeah, that's what I should have said. d8-)


I recall a description of the operation of a 4-cycle engine as "suck,
squeeze, pop, phooey" It omits a few thermodynamic details and
perhaps isn't achingly accurate, but it is certainly descriptive!


Hahaha! Oh, I love it....

--
Ed Huntress



Lim time....

I say, "Phooey" to little Miss Grace,
Who will not let my cock in her 'place'.
But though she'll not **** it,
She'll squeeze it and suck it,
And let it pop off in her face.


(I got four out of four....)

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.98*10^14 fathoms per fortnight.