Calculate the minimum frequency of ultrasound that will allow you to see details as small as 0.802 mm in human tissue. (Assume the speed of sound through human tissue is 1540 m/s.)

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared