I drove 2 hours and 25 minutes to the south for 125km. Then I rested for 30.0 minutes. I then drove another 45.0 minutes at 50.0km/hr

a. What is my average speed?

b. What is my average velocity?

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