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Forum index » Science and Technology » Engineering » Mechanics
Suspect Calculators
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Bret Cahill
science forum Guru


Joined: 05 May 2005
Posts: 480

PostPosted: Sun Jul 02, 2006 5:21 pm    Post subject: Suspect Calculators Reply with quote

A lot of on line physics and engineering calculators are suspect and
many get pulled as soon as I present them as being "interesting" or
"fun." (I never diss a free calculator.)

The drag on a sphere calculator below is probably OK but they leave it
to you to figure out the exponent.

http://www.ecs.syr.edu/centers/simfluid/redder/dragforce/DragForce.html

I start out using something I know like the drag force on a car going
55 mph. Then I work my way down to the order of magnitude of concern.


Bret Cahill
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