Kristen is about to use a bow to shoot an arrow at a target. She pulls the bow back as far as it will go and holds it in this position. Before Kristen releases the bow to shoot the arrow, the bow has A. chemical energy. B. electrical energy. C. potential energy. D. kinetic energy.

An observer that stands still as the electron moves by him, will observe

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

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?