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Nitrobenzene is an aromatic nitro compound and the simplest of the nitrobenzenes, with the chemical formula C 6 H 5 NO 2. It is a water-insoluble pale yellow oil with an almond -like odor. It freezes to give greenish-yellow crystals.
If the benzene ring contains other substituents, it belongs in Category:Nitrobenzene derivatives Wikimedia Commons has media related to Nitrobenzenes . The main article for this category is Nitrobenzenes .
Black holes with 2r Q > r s cannot exist in nature because if the charge is greater than the mass there can be no physical event horizon (the term under the square root becomes negative). [9] Objects with a charge greater than their mass can exist in nature, but they can not collapse down to a black hole, and if they could, they would display a ...
In physics, black hole thermodynamics [1] is the area of study that seeks to reconcile the laws of thermodynamics with the existence of black hole event horizons.As the study of the statistical mechanics of black-body radiation led to the development of the theory of quantum mechanics, the effort to understand the statistical mechanics of black holes has had a deep impact upon the ...
Hexanitrobenzene, also known as HNB, is a nitrobenzene compound in which six nitro groups are bonded to all six positions of a central benzene ring. It is a high- density explosive compound with chemical formula C 6 N 6 O 12 , obtained by oxidizing the amine group of pentanitroaniline with hydrogen peroxide in sulfuric acid .
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 ...
NHMs play an important role in studying the geometry and topology of black holes, but are only well defined for extremal black holes. [ 1 ] [ 2 ] [ 3 ] NHMs are expressed in Gaussian null coordinates, and one important property is that the dependence on the coordinate r {\displaystyle r} is fixed in the near-horizon limit.