Two long, parallel, current-carrying wires lie in an xy-plane. the first wire lies on the line y = 0.330 m and carries a current of 26.5 a in the +x direction. the second wire lies along the x-axis. the wires exert attractive forces on each other, and the force per unit length on each wire is 300 µn/m. what is the y-value (in m) of the line in the xy-plane where the total magnetic field is zero?

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