Which term describes the light-sensitive structures found on the retina? a. aqueous humor b. vitreous humor c. rods and cones d. sclera

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.