Measuring radius of spherical cap
Aug 14, 2016
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Subject: Spelling Lesson
The last four letters in American.........I Can
The last four letters in Republican.......I Can
The last four letters in Democrats.........Rats
End of lesson. Test to follow in November, 2016
Remember, November is to be set aside as rodent extermination month.
A poor man's instrument may be a well-chamfered nut and bolt. Sit the nut flush on a flat surface, turn the bolt till it touches. Measure the length of the bolt plus nut. Retract the bolt. Sit the chamfer on the sphere, turn the bolt till it touches. Measure again, giving a difference d. With radius r of the chamfer, we get ( r^2+d^2 )/2d for the radius of the sphere.
Groetjes Albert
Albert van der Horst, UTRECHT,THE NETHERLANDS
Economic growth -- being exponential -- ultimately falters.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst
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