Why Does A Golf Ball Have Dimples?
A golf ball can be driven great distances down the fairway. How is this possible? The answer to this question can be found by looking at the aerodynamic drag on a sphere without dimples (while it's flying through the air!). The first kind of drag is the…
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How We Use Crystals To Tell Time
Quartz clock operation is based on the piezoelectric property of quartz crystals. If you apply an electric…