Which of the following statements is true? a: weathering and erosion are the same processes. b: coarse, infertile soil is usually found near the base of a mountain. c: rocks formed at low temperatures weather more quickly than rocks formed at high temperatures. d: weathering is the movement of sediment from one location to another.

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