I need help please. i have a couple of questions if someone could please help me with. 1. If a satellite with a small mass (any #) is orbiting the earth with an orbit radius of 4000000m, what is the circular velocity of the satellite? 2. if the distance to an object is 4000000 km and the linear diameter if the same object is 2250 km, what is the angular diameter of the object in degrees?