Two cups of water are poured to into the same container. The water in cup A was initially at 15.3°C and the water in cup B was initially at 51.8°C. Calculate the final
temperature when the water in the container reaches thermal equilibrium

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