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Moment of inertia of the earth about an axis passing through its centre of mass is (where R and `rho` are radius and density of the earth respectively).A. `(2//5)pi R^(5)rho`B. `(2//3)pi R^(5)rho`C. `(8//15)pi R^(5)rho`D. `(4//15)pi R^(5)rho` |
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Answer» Correct Answer - C `I=(2)/(5)MR^(2)=(2)/(5)rho VR^(2)` `=(2)/(5)rho (4 pi)/(3)R^(3)xx R^(2)= (8)/(15)rho pi R^(5)` |
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