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These tensor fields should obey any relevant physical laws (for example, any electromagnetic field must satisfy Maxwell's equations).Following a standard recipe which is widely used in mathematical physics, these tensor fields should also give rise to specific contributions to the stress–energy tensor. [1]
Brief Answers to the Big Questions is a popular science book written by physicist Stephen Hawking, and published by Hodder & Stoughton (hardcover) and Bantam Books (paperback) on 16 October 2018. The book examines some of the universe 's greatest mysteries, and promotes the view that science is very important in helping to solve problems on ...
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.
However, vitamin D supplements have no effect on preventing falls or fractures in older adults, according to the U.S. Preventative Services Task Force. Vitamin D supplementation for postmenopausal ...
This chapter covers the discovery of the fundamental particles of the Standard Model. [18] Chapter 8: The God Particle At Last: Covers spontaneous symmetry breaking and the Higgs boson. [19] Chapter 9: Inner Space, Outer Space, and the Time Before Time: Looks at astrophysics and describes the evidence for the Big Bang. [20]
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The 10,000 steps per day rule isn’t based in science. Here’s what experts have to say about how much you should actually walk per day for maximum benefits.
String theory posits that at the beginning of the universe (up to 10 −43 seconds after the Big Bang), the four fundamental forces were once a single fundamental force. According to string theory, every particle in the universe, at its most ultramicroscopic level ( Planck length ), consists of varying combinations of vibrating strings (or ...