Abullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. what is the average force (in n) exerted on a 0.0200 kg bullet to accelerate it to a speed of 575 m/s in a time of 2.70 ms (milliseconds)? (enter the magnitude.)

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90