Water flows through a 1-cm diameter pipe connected to a 1/2-cm diameter pipe. compared to the speed of the water in the 1-cm pipe, the speed in the 1/2-cm pipe is:

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