2. Galaxy X in the Virgo Cluster has a cosmological redshift in its spectrum of z = 0.003 indicating it is moving away from us at 900 km/s. Galaxy Y has z = 0.015 a) Using z = v/c and our math shortcut, how fast is Galaxy Y moving away from us? (You can review the method in Box 23-2.)

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?