what is the distance in meters of an object that has an angular diameter of 30 arc seconds in a linear diameter of 10 cm

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Determine the maximum r-value of the polar equation r =3+3 cos 0

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