A teacher discusses a scientific theory that has been in place for almost a century.

Which would present the greatest challenge to this theory?
lists of what the theory cannot explain
discussion of the theory on Internet blogs
results from new experiments that contradict the theory
opinions of a vocal group of citizens that oppose the theory

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?