【简答题】A 5.0 MeV alpha particle (Z=2) approaches a gold nucleus (Z=79) with an impact parameter of 2.6×10-13 m. The scattered angle is( ).The cross section s is( )
【简答题】• Locate the nucleus of “B” according to the contexts (two or three different “A”s). Read them, record them and upload them. Ø A: Paul looks happy! Ø A: I think Paul needs a new car. ü B: He’s got a n...