Two 10-cm-diameter charged rings face each other, 15 cm apart. the left ring is charged to -23 nc and the right ring is charged to +23 nc . what is the magnitude of the electric field e⃗ at the midpoint between the two rings?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?