Which are examples of a person changing careers? Check all that apply. A. a home insurance salesman decides to start selling home warranties instead
B. a farmer decides to start practicing real estate and selling local land
C. a biology teacher moves to teach the elective cooking classes for that school year
D. a factory worker who manufactures linens moves to a new factory that manufactures pencils a crab fisherman decides to start a business maintaining local boats

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?