An important news announcement is transmitted by radio waves to people who are 120 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 3.6 m from the newscaster. take the speed of sound in air to be 350 m/s. what is the difference in time that the message is received? answer in units of ms.

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?