Answer all the questions in the spaces provided. (b) The planet Jupiter and one of its moons, Io, may be considered to be uniform spheres that are isolated in space. Jupiter has radius R and mean density ρ. Io has mass m and is in a circular orbit about Jupiter with radius nR, as illustrated in Fig. 1.1. [Figure 1.1] The time for Io to complete one orbit of Jupiter is T. (c) (i) The radius R of Jupiter is 7.15×10⁴km and the distance between the centres of Jupiter and Io is 4.32 × 10⁵ km. The period T of the orbit of Io is 42.5 hours.