Physics

Physics students at North Carolina State University can get their introductory-level textbooks for free thanks to a new program by the college.

Each year about 1,300 students at North Carolina State take Physics 211 and Physics 212. Beginning this semester, the university's libraries and physics department have offered the courses' textbook online for free. Students can also print pages of the text or buy a printed copy at the university's bookstore for about $45.

Starting from first principles and general assumptions Newton's law of gravitation is shown to arise naturally and unavoidably in a theory in which space is emergent through a holographic scenario. Gravity is explained as an entropic force caused by changes in the information associated with the positions of material bodies. A relativistic generalization of the presented arguments directly leads to the Einstein equations. When space is emergent even Newton's law of inertia needs to be explained. The equivalence principle leads us to conclude that it is actually this law of inertia whose origin is entropic.

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