Correct me if I'm wrong

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev, respectively?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

The air that we breath is made mostly of which gaseous molecule