What are the layers of the sun, starting from the surface and moving inward?

a) photosphere, radiative zone, convective zone, core
b) core, radiative zone, convective zone, photosphere
c) photosphere, convective zone, radiative zone, core
d) core, photosphere, convective zone, radiative zone

Why did ptolemy have to introduce multiple circles of motion for the planets instead of a single, simple circle to represent the planetâs motion around the sun?

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?