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The mass of all the oceans on the surface of the Earth is estimated to be 1.35 * 10^18 metric tons, or 1.35 * 10^21 kilograms. The mass of the Moon is estimated to be 7.35 * 10^22 kilograms. The distance from the Moon to the Earth at perigee (the closest distance) is 363,104 kilometers, or 363,104,000 meters. If you assume the oceans cover the entire ...


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The statement of Newton's law you have given is specifically about the gravitational attraction between point masses. It also comes to mean, through the Shell theorem the force between a spherically symmetric body and another outside the first body: we replace the spherical body with a point at its center. For other geometries you calculate the force ...


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If you go to Wolfram Alpha and type in You get some very helpful information - the exact date and time of the next new moon (in the local time zone), as well as the moon rise and set times. Doing that right now, I get the following: You can decide if that is the information you need to compute the first day of Ramadan - but you can see here that if ...



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