A Series circuit has 25.000 resistors in a power source of 9.0 V. How will the current be affected and wet will it be if another resistor with a resistance of 7.5 arms is added to the circuit?

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?