Consider the diagram shown at right, which has a 15 V battery connected to two resistors valued at R1 = 30. Ω and R2 = 20. Ω and an ammeter. Calculate:
a the equivalent resistance
b. the power dissipated across R2
c. the reading made by the ammeter

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