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Thanks to ChristyR for sharing this cartoon with us.
Understanding that my son is an engineer, it is a pity the non-engineers
cannot discern the sinusoidal motion
on the part of the subject. Engineers, on the other hand, take delight in burying ourselves in such interesting research.
Describing
simple harmonic movement & repatition
For Engineers:
 >
 >
For non - Engineers:
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