Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is
negligible friction between his feet and the ice. A friend
throws Olaf a ball of mass 0.400 kg that is traveling
horizontally at 12.0 m/s. Olaf's mass is 72.0 kg (Figure
1)

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

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

What is a subatomic particle with a negative charge and very little mass?