Can someone one add me as there friend and does anybody want to go on a google meet

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?

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?

What are known as the properties of substances that describe a substance et does not change that substances?