You drop a 30 g pebble down a well. you hear a splash 2.7 s later. ignoring air resistance, how deep is the well? assume g = 9.8 m/s2.

a)0.79 m
b)36 m
c)71 m
d)790 m

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?