HELP PL A pulse travels at speed v on a stretched rope.

By what factor must you increase the force you exert on the rope to cause the speed to increase by a factor of 1.20?
F'/F =

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."