Abeaker contains a substance that takes up approximately half the volume of the beaker but does not touch all sides of the beaker. the substance must be a

a) gas.

b) solid.

c) liquid.

d) life-size model of tom cruise.

( that last answer is actually what the test says, not joking xd )

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