Answer:
Earth
rotates about its polar axis. When ice of polar caps of earth melts, mass
concentrated near the axis of rotation spreads out. Therefore, moment of
inertia I increases.
As no external torque
acts, \[\therefore \] \[L=I\omega =I\left( \frac{2\pi }{T}
\right)=cons\tan t\]
With increases of I, T
will increase i.e. length of the day will increase.
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