A horizontal uniform bar of mass 2.9 kgkg and length 3.0 mm is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached a distance 0.74 mm from the other end. A monkey of mass 1.45 kgkg walks from one end of the bar to the other. Find the tension T1T1T_1 in string 1 at the moment that the monkey is halfway between the ends of the bar.

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