Last one: Every object in the universe attracts every other object

**Answer:**

**Explanation:**

I = Moment of inertia of sphere =

M = Mass of sphere = 29 kg

R = Radius of sphere = 0.5 m

T = Time taken for one revolution = 0.5 s

= Angular velocity =

**The rotational angular momentum of the sphere is .**

Mars.

Mars is the furthest away from the Sun so therefore has a longer journey to make to complete a full orbit (solar year)

if it moves 7m/s, that means every second it goes 7m. Now we just multiply by the time (20 seconds) and end up with **140m.**