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Old September 8th 09, 12:21 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jun 2006
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Default Corriolis force

Dave wrote:

predicting the properties of something that is impossible to make is
impossible.


Egad, not at all.

The elements we use in circuit analysis, for example -- pure
resistances, capacitances, inductances, sources, and so forth -- are all
impossible to make. Yet we know their properties in exacting detail. One
cannot cut a stick to a length of exactly pi meters, yet the properties
of pi are precisely known. For that matter, we can't even make a stick
that's exactly one meter long, but the meter is very well defined.

Those are just a very few of the vast number of things which are
impossible to make yet whose properties are known. Math, science and
engineering wouldn't be possible without them.

Roy Lewallen, W7EL
 
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