Which of the following statements are not supported by theorists opposing the claim that violent video games lead to aggressive behavior? A. Persons with increased aggression have pre-existing mental issues. B. Violent behavior is due to a combination of other factors. C. Influences of violent video games on aggression are major. D. Influences of violent video games on aggression are temporary.

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?