Why do you need to apply a force in order to get the box to move?

Explain why you think this diagram shows what happened to the carbon in the biodome.

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?

Of is j/kg·k. if a 2.6 kg of isk to k,is ?