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63,360 x 238,900 = 15,136,704,000(inch now) (1.5inch x 4,000,500,000 = 6,000,750,000) 15,136,704,000 - 6,000,750,000 (inch then ) = 9,135,954,000 inches. 9,135,954,000/63360=144,191.19318181 (converting it back to miles) Roughly 144,000 miles 4.5 billion years ago But due to the tidal friction, caused by the tidal bulge, the earth loses energy and is given ...

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The volume of your dust cloud will not change. The shape changes but the volume does not, so the density of the cloud remains constant. The Schwarzschild solution is a vacuum solution and the Ricci tensor is everywhere zero. If you look at section 5.2 of this paper it shows that the change in volume of an infinitesimal volume element is proportional to the ...

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A tidal force happens because different parts of the infalling object are trying to move along different geodesics. Suppose we take the 3-vector $\eta$ to be the distance between two points, then we can calculate how $\eta$ changes as the object falls inwards. If $\eta$ is constant then the distance between the points isn't changing and there is no tidal ...

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Ignoring the difficulty with blowing a sizable piece of the moon off, there's 2 primary factors to consider. Distance and angular momentum. Distance The moon actually rotates. All tidally locked objects rotate, they just rotate, they just rotate in sync with their orbit. The Moon rotates once every 28 days, the same as it's orbital period. If the ...

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