| Title: | Mathematics at DEC |
| Moderator: | RUSURE::EDP |
| Created: | Mon Feb 03 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2083 |
| Total number of notes: | 14613 |
The following is a problem assigned in one of my freshman calculus
class. (I was very proud of this since I was the only one who turned
in the solution and later proved that the solution the professor gave
was wrong :-) :-) ).
Take a cube and spin along the axis that goes through a pair of
diagnal vertices (The vertices who are (3)^(1/2) apart assuming
the edges have length 1). Describe the object as the result of
spinning.
Eugene
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 974.1 | Japanese Lantern? | AKQJ10::YARBROUGH | I prefer Pi | Thu Nov 10 1988 18:57 | 9 |
Is this one reserved for new folks? Solution follows: The solid of revolution is in three sections of height \/(1/3) = .5774 and radius \/(2/3) = .8165 ["\/" = sqrt]. The top & bottom are identical circular cones. The center section is a truncated hyperbolic paraboloid whose 'waist' radius is \/(1/2) = .7071 . Lynn Yarbrough | |||||
| 974.2 | AITG::DERAMO | Daniel V. {AITG,ZFC}:: D'Eramo | Thu Nov 10 1988 20:35 | 5 | |
>> Describe the object as the result of spinning.
It will get dizzy. :-)
Dan
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