Solve the given problem:
Problem: On 15 July 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere. This satellite was injected into an orbit 705 km above the earth's surface, and we shall assume a circular orbit.
Part I: How many hours does it take this satellite to make one orbit?
h
Part II: How fast (in km/s) is the Aura spacecraft moving?
km/s
Please use great detail in explaining the solution. Thank you.