A smooth stock market on the surface is masking nerves and turbulence The stock market is more volatile lately, making investors more picky about what they want to own. It's possible to miss some of ...
A ROTATING shaft can exhibit torsional vibration when, because the dynamic coefficient of friction is less than the static value, the frictional force at the bearings supporting the shaft decreases as ...
The Earth is always spinning on an imaginary line called an axis. This line goes through the North and South poles. We call this spinning, rotation, and it takes about 24 hours for the Earth to make ...
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