Inhiscolumntitled"E=mc2"publishedonAugust16,DavidTangoffered$2,000tothefirstcorrectentrythatexplainedtheparadoxinthecolumn.Mr.Tanghasprovideduswiththissolution:
Wehavereceivedmorethan50entries.Overhalfofthemofferedcorrectexplanations.ThewinnerisAlecLaiwhoseentrywassentat10:02amonAugust16.Thankyouverymuch.