in a game of football between James and Richard James his wife of mass 25 g. while moving at 2 m per second it hit stationary blue ball of mass 20 grams after collision the whiteboard reduce the loss it is 2 m per second using the law of conservation of momentum or otherwise calculate the velocity at which the Blue Ball was moving after it was hit by a white ball.

An electron is trapped at a defect in a crystal. the defect may be modeled as a one-dimensional, rigid-walled box of width 1.00 nm. (a) sketch the wavefunctions and probability densities for the n 1 and n 2 states. (b) for the n 1 state, nd the probability of nding the electron between x1 0.15 nm and x2 0.35 nm, where x 0 is the left side of the box. (c) repeat (b) for the n 2 state. (d) calculate the energies in electron volts of the n 1 and n 2 states