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Most books are also available in Kindle versions on Amazon.com and in the iBooks Store. OpenStax's first textbook was College Physics, which was published online, in print, and in iBooks in 2012. OpenStax launched OpenStax Tutor Beta in June 2017, adaptive courseware based on cognitive science principles, machine learning, and OpenStax content.
In June 2014 Chegg acquired online tutoring platform InstaEDU, for a reported $30 million, [33] renaming the division Chegg Tutors, [28] [34] and in October 2014 it acquired Internships.com. [citation needed] In 2017, Chegg acquired RefME, [35] a free citation management tool available on web, iOS and Android.
In physics, there are equations in every field to relate physical quantities to each other and perform calculations. Entire handbooks of equations can only summarize most of the full subject, else are highly specialized within a certain field. Physics is derived of formulae only.
The handbook was originally published in 1928 by the Chemical Rubber Company (now CRC Press) as a supplement (Mathematical Tables) to the CRC Handbook of Chemistry and Physics. Beginning with the 10th edition (1956), it was published as CRC Standard Mathematical Tables and kept this title up to the 29th edition (1991).
MIT OpenCourseWare (MIT OCW) is an initiative of the Massachusetts Institute of Technology (MIT) to publish all of the educational materials from its undergraduate- and graduate-level courses online, freely and openly available to anyone, anywhere.
The book was initially published on January 29, 2013 by Basic Books. [ 1 ] [ 2 ] [ 3 ] The Theoretical Minimum is a book and a Stanford University -based continuing-education lecture series, which became a popular YouTube-featured content.
A Magic Triangle image mnemonic - when the terms of Ohm's law are arranged in this configuration, covering the unknown gives the formula in terms of the remaining parameters. It can be adapted to similar equations e.g. F = ma , v = fλ , E = mcΔT , V = π r 2 h and τ = rF sin θ .
Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal nĚ‚, d is the dipole moment between two point charges, the volume density of these is the polarization density P.