Mass Distribution: Polar Icecaps Melting & Day Length

[Jonathan Teas]

Homework Statement

If the polar icecaps melted, the resulting water would spread over the entire earth. This new mass distrubtion would tend to make the length of a day:
a.longer,b.shorter,c.be unchanged,d.explode

Homework Equations

Mass does distribute uniformly but I am not sure how this affects the length of a day.

The Attempt at a Solution

 

[betel]

Think about rotation, angular momentum and moment of inertia