In a solution if substance a makes up 1%, substance b makes up 9%, substance c makes up 20% and substance d makes up 70%, which substance would generally function as the solvent?

a. substance d
b. substance c
c. substance a
d. substance b

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

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above