This is a coral reef ecosystem. Many biotic and abiotic factors affect the health of this ecosystem. Which set correctly pairs a biotic factor and an abiotic factor?

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?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Acar travels 40m in 8 seconds find the car speed