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## Homework Statement

How long should the day be so that the total angular momentum of the Earth

(including its rotation about its own axis and its (approximately) circular orbit around the

sun) is zero (Note: the magnitude of the angular velocity is 2pi/T where T is the period of rotation?)

## Homework Equations

Ltot = Ltrans + Lrot

Lrot = Iw^2

w = 2pi/T

## The Attempt at a Solution

Ltot = 0

I am really clueless. I don't know where to start..