imagine if someone sliding down a slide if the friction force is stronger then force of gravity what will happen and why

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

Select the correct answer. what does the process of natural selection involve?

By what primary heat transfer mechanism does the sun warm the earth?