On Fri, 4 Nov 2011 14:13:41 -0500, Turriff, Leslie wrote:
> Ounces measure weight, not mass. But there are at least two ounces, the
> "common" ounce (I don't know what its formal name is) [avoirdupois - gil] and
> the Troy ounce, used for measuring gold, etc.
>
And Specific Impulse is measured in seconds: the time an engine burning one
pound
of fuel can produce one pound of thrust. So:
delta-V = ln( initial mass / final mass) * SI * 32.2 ft/sec^2
(What do you think they are? Rocket scientists?)
And I have been told that engineers working in the metric system use the
kilogram, not the newton, as a unit of weight, and a unit of mass equal to
9.8 kilograms.
Go to your hardware store and ask to buy a rope with a load-bearing
strength rated in newtons. All terracentric thinking.
-- gil
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