Prudence and Charity are twins raised at the
center of a rotating kingdom. Charity goes to
live at the edge of the kingdom for a time and
then returns home.
Which twin is older when they rejoin? (Ig-
nore any time-dilation effects associated with
travel to and from the edge.)
One electron travels twice as fast as another.
Which has longer wavelength?
Calculate the de
Broglie wavelength of a