FACTOID # 106: Americans are 15% more innovative than the Japanese. But in percentage terms, the Japanese grant 3.5 times more patents.
 
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Encyclopedia > 216 BC

Centuries: 4th century BC - 3rd century BC - 2nd century BC


Decades: 260s BC 250s BC 240s BC 230s BC 220s BC - 210s BC - 200s BC 190s BC 180s BC 170s BC 160s BC


Years: 221 BC 220 BC 219 BC 218 BC 217 BC - 216 BC - 215 BC 214 BC 213 BC 212 BC 211 BC


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Ballistic Coefficient (905 words)
BC is what determines trajectory and wind drift, other factors (velocity among them) being equal.
BC changes with the shape of the bullet and the speed at which the bullet is traveling, while sectional density does not.
This is shown by the smaller difference in BC between the two pointed bullets,.357 for the flat base and.400 for the boat tail.
  More results at FactBites »


 

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