![]() He calculated that the circular orbital motion of radius R and period T requires a constant inward acceleration A equal to the product of 4π 2 and the ratio of the radius to the square of the time: When Newton discovered that the acceleration of the Moon is 1/3,600 smaller than the acceleration at the surface of Earth, he related the number 3,600 to the square of the radius of Earth. He realized that this force could be, at long range, the same as the force with which Earth pulls objects on its surface downward. By invoking his law of inertia (bodies not acted upon by a force move at constant speed in a straight line), Newton concluded that a force exerted by Earth on the Moon is needed to keep it in a circular motion about Earth rather than moving in a straight line. Newton assumed the existence of an attractive force between all massive bodies, one that does not require bodily contact and that acts at a distance. By his dynamical and gravitational theories, he explained Kepler’s laws and established the modern quantitative science of gravitation. Newton discovered the relationship between the motion of the Moon and the motion of a body falling freely on Earth. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. ![]() ![]() Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.Once all core requirements are met, students may substitute a three-hour (or more) general elective in place of a core area. Core requirement hours may vary by individual, based on placement and previous credit granted. Students wishing to follow the eight-semester degree plan should see the Eight-Semester Degree Policy for university requirements of the program. The college writing requirement may also be met by the completion of an honors thesis. Writing Requirement:The college writing requirement is to be met by completion of a term paper deemed satisfactory by the student’s adviser and instructor of an upper-level geoscience course. World language courses taken are dependent on placement level in sequence. Survey of the Universe (ACTS Equivalency = PHSC 1204 Lecture) and Survey of the Universe Laboratory (ACTS Equivalency = PHSC 1204 Lab)Įarth System History (ACTS Equivalency = PHSC 1104)Īt least 6 additional hours, at the 3000 level or above, in GEOS. Calculus I (ACTS Equivalency = MATH 2405)Ħ hours in a single world language at the 1013 Elementary II level or higher 1
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