Awildlife researcher is tracking a flock of geese. the geese fly 4.0 km due west, then turn toward the north by 40º and fly another 4.0 km. what is the magnitude of their displacement? calculate this and enter it, in km, to two significant figures.

The results of huy's eye exam show that he is nearsighted. which explanation should huy expect to hear? "you need convex lenses to shorten the distance that light takes to focus in your eyes." "you need concave lenses to shorten the distance that light takes to focus in your eyes." "you need convex lenses to lengthen the distance that light takes to focus in your eyes." "you need concave lenses to lengthen the distance that light takes to focus in your eyes."