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A tidal force is exerted on the ocean by the moon. This is estimated by the differential (dg) which is the difference of the acceleration at B and that at C due to the moon (Fig. 5.3). If R is the radius of the earth, d the distance of separation of the centre of earth and moon, M and m the mass of the earth and moon, respectively, show that dg=2GmR/d^3 |
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