Natural, Scientific and Medical Wonders
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Showing posts with label
Crystal
.
Show all posts
Showing posts with label
Crystal
.
Show all posts
Sunday, August 25, 2019
Wonderfully exciting - Piezoelectricity!
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In 1960s, I listened to Gramophone machine with wonder, how it worked, as its arm danced on a grooved disc that rotated round and ro...
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