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By changing the electric motor rotation rate,
we change the frequency of flow pulsation's
and reach the resonance frequency of the orifice,
which causes intensive cavitation.
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It's May, and we seem to be in a poetic mood. Kowalski's lines remind me of an article in Slate magazine titled "The Poetry of D. H. Rumsfeld":
http://slate.msn.com/id/2081042
It is actually rather nice. Two examples:
The Unknown
As we know,
There are known knowns.
There are things we know we know.
We also know
There are known unknowns.
That is to say
We know there are some things
We do not know.
But there are also unknown unknowns,
The ones we don't know
We don't know.
Glass Box
You know, it's the old glass box at the�
At the gas station,
Where you're using those little things
Trying to pick up the prize,
And you can't find it.
It's�
And it's all these arms are going down in there,
And so you keep dropping it
And picking it up again and moving it,
But�
Some of you are probably too young to remember those�
Those glass boxes,
But�
But they used to have them
At all the gas stations
When I was a kid.
