TREATISE:
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Nodal Theory
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Quiz of the Month (July 2006)
Hector C. Parr
SOLUTION TO LAST MONTH'S QUIZ
1. 56.55 m2 Notes.
Q.3 The area consists of:
a semicircle of radius 30 m
+ two quadrants of radius 24 m
+ two 30o sectors of radius 12 m
+ equilateral triangle ACD
= PI*302/2 + 2*PI*242/4 + 2*PI*122/12 + 36*sqr(3)
= 762*PI + 36*sqr(3)
= 2456.2
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THIS MONTH'S QUIZThe hubs of both the supply spool and the take-up spool of an old reel-to-reel tape recorder have diameter 4 cm. A full reel of tape will play for one hour, and the initial outer diameter of the tape on the supply spool is 16 cm. 1. A full reel starts playing at 12 noon. What will be the diameter of the tape on the take-up spool at 12:21 pm ? 2. What will be the diameter of the tape on the supply spool at 12:55 pm ? 3. At what time will the tape on the supply spool have diameter 8 cm ? |