physics
posted by nikki .
Suppose partial melting of the polar ice caps increases the moment of inertia of the Earth from 0.331MR^2 to 0.332MR^2. What is the change in length of day in seconds?

momentum is conserved
Io*wo=In*wn
wn/wo=Io/Inew
but angular velocity=2PI/period
then
Periodorig/periodnwe=Io/In
period new= periodold*(..331/.332)
=24hrs*3600sec/hr*(.332/.331)
change in period
period newperiod old
change in period=24*3600(.332.331)/.331
I get about 260 seconds. check all that.
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