which weather change usually occurs when the difference between the air temperature and the dewpoint temperature is decreasing

What happens in a global convection cell

Simple machines can a. increase force only b. decrease force only c. increase or decrease 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?