Clearly piezoelectricity is way more common than I knew.
Sugar crystals? DNA? Bones? All are piezoelectric?
And if piezoelectric crystals lack a center of symmetry (2:20), how the heck is quartz piezoelectric? It looks awfully symmetrical to me.
Apparently, though, the quartz crystal is absolutely piezoelectric, as shown by Bill Hammack, the Engineer Guy...
Theoretically, it's possible to make and test your own piezoelectric crystal at home...(though sadly he uses a commercial piezoelectric crystal to make his guitar pickup)
As to how we can make use to piezoelectrcitiy...
- Top uses of piezoelectricity in everyday applications (inkjet printers, earbuds, tennis racquets, course-changing bullets, humidifiers, sonar, pressure sensors)
- Applications of piezoelectricity (from wikipedia)
- Piezoelectricity and its uses (even explaining how some tennis racquets use piezoelectrcity)
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