The fictional rocket ship adventure is measured to be 65m long by the ship's captain inside the rocket. when the rocket moves past a space dock at 0.5c. as rocket ship adventure passes by the space dock, the ship's captain flashes a flashlight at 1.40-s intervals as measured by space-dock personnel.
how often does the flashlight flash relative to the captain?
express your answer to two significant figures and include the appropriate units.
t=

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