True or false? when speed is constant, the speed-time graph will slope uphill

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

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?