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5 hours ago · A black hole with the mass of a car would have a diameter of about 10 −24 m and take a nanosecond to evaporate, during which time it would briefly have a luminosity of more than 200 times that of the Sun. Lower-mass black holes are expected to evaporate even faster; for example, a black hole of mass 1 TeV/c 2 would take less than 10 −88 seconds to evaporate completely. For such a small ...
- Talk
Black hole is a former featured article.Please see the links...
- Schwarzschild Black Hole
where is 3 dimensional Euclidean space, and is the two...
- List of Nearest Black Holes
This is a list of known black holes that are close to the...
- Event Horizon
The reachable Universe as a function of time and distance,...
- John Michell
John Michell (/ ˈ m ɪ tʃ əl /; 25 December 1724 – 21 April...
- Talk
5 hours ago · Methane is a tetrahedral molecule with four equivalent C–H bonds. Its electronic structure is described by four bonding molecular orbitals (MOs) resulting from the overlap of the valence orbitals on C and H. The lowest-energy MO is the result of the overlap of the 2s orbital on carbon with the in-phase combination of the 1s orbitals on the ...
5 hours ago · Definition and basic properties. General relativity is a metric theory of gravitation. At its core are Einstein's equations, which describe the relation between the geometry of a four-dimensional pseudo-Riemannian manifold representing spacetime, and the energy–momentum contained in that spacetime. [46]
5 hours ago · 1 Introduction. This chapter is designed to cover essential “standard operating procedures” (SOPs), or best practices, for a general food analysis laboratory. The topics covered in this chapter include balances, mechanical pipettes, glassware, reagents, precision and accuracy, data handling, data reporting, and safety.
5 hours ago · Libertarianism portal. United States portal. v. t. e. Avram Noam Chomsky ( / noʊm ˈtʃɒmski / ⓘ nohm CHOM-skee; born December 7, 1928) is an American professor and public intellectual known for his work in linguistics, political activism, and social criticism. Sometimes called "the father of modern linguistics", [a] Chomsky is also a major ...
5 hours ago · Aim of the paper is to analyse the occurrence of occupational stress across European Union countries, considering gender and job sustainability as determinants, with a specific attention to the effects of home-based work. Although COVID-19 pandemic has brought such issues into a novel spotlight, to detect the response pattern towards occupational stress we chose to employ the latest official ...
1 day ago · Sustainability is a social goal for people to co-exist on Earth over a long time. Definitions of this term are disputed and have varied with literature, context, and time. [2] [1] Sustainability usually has three dimensions (or pillars): environmental, economic, and social. [1]
