Lake tuscaloosa has an elevation of 223'. it was created in 1970 by damming north river, which feeds into the black warrior river at an elevation of 123'. if the average flow rate through north river is 3 m3 /s, and 90% of the river is diverted to a hydroelectric facility with an efficiency of 91%, find the electricity that could be generated here, in kwh, per year of op

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?