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The gauge-invariant perturbation theory is based on developments by Bardeen (1980), [7] Kodama and Sasaki (1984) [8] building on the work of Lifshitz (1946). [9] This is the standard approach to perturbation theory of general relativity for cosmology. [10]
This timeline lists significant discoveries in physics and the laws of nature, including experimental discoveries, theoretical proposals that were confirmed experimentally, and theories that have significantly influenced current thinking in modern physics. Such discoveries are often a multi-step, multi-person process.
Newton's laws are often stated in terms of point or particle masses, that is, bodies whose volume is negligible. This is a reasonable approximation for real bodies when the motion of internal parts can be neglected, and when the separation between bodies is much larger than the size of each.
14 Aram Minnetian, Boston College* 16 Paul Fischer, Notre Dame. 24 Cole Hutson, Boston University. 28 Zeev Buium, University of Denver* Forwards. Number, player, team. 2 Teddy Stiga, Boston College.
President-elect Donald Trump has long supported House Speaker Mike Johnson — hosting him on election night, bringing him to the Army-Navy college football game last weekend and backing him ...
Per serving: About 325 cal, 17 g fat (2 g sat), 0 mg chol, 213 mg sodium, 36 g carb, 12 g fiber, 14.5 g sugar (1 g added sugar), 10 g pro. You Might Also Like.
This article is a list of notable unsolved problems in astronomy.Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results.
Just days after the USDA issued a new order that all raw milk must be tested for bird flu, reports have emerged of animals dying of the virus, including cats and several zoo animals.