7. A Helium nucleus (2 protons, 2 neutrons, Time = 4m?) is red towards a heavy nucleus (46 protons, 46 neutrons) that is xed in place. What is the closest approach of the Helium nucleus, as measured from the center of the two objects, if the initial speed of the Helium at a very distant location is 4.56 X 104 m/s? (1) 3.0 x 10*9 m (2) 5.5 x 10*9 m (3) 6.0 x 10,9 111 (4) 9.8 x 109 m (5) 1.3 x 10*10 m