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The Uvalde school shooting [6] [7] [8] was a mass shooting that occurred on May 24, 2022, at Robb Elementary School in Uvalde, Texas, United States, when 18-year-old Salvador Ramos, [9] [10] a former student at the school, fatally shot 19 students and two teachers, while 17 others were injured but survived.
기본 전하 (基本電荷, 영어: elementary charge )는 양성자 하나가 지니고 있는 전하 이며, 또한 전자 하나가 지니고 있는 전하의 절댓값이다. 일반적으로 기호 e 를 사용하여 표현되며, 간혹 q 로 표현한다. 기본 전하는 기본적인 물리 상수 의 하나로, 원자 단위계 ...
Color charge is a property of quarks and gluons that is related to the particles' strong interactions in the theory of quantum chromodynamics (QCD). Like electric charge, it determines how quarks and gluons interact through the strong force; however, rather than there being only positive and negative charges, there are three "charges", commonly called red, green, and blue.
La costante di struttura fine, o costante di Sommerfeld, indicata con la lettera greca αe, è la costante di accoppiamento dell' interazione elettromagnetica, di cui esprime l'intensità relativamente alla carica elementare . Fu introdotta da Arnold Sommerfeld nel 1916 come misura della deviazione relativistica delle linee spettrali del ...
v. t. e. An electron and an electron hole that are attracted to each other by the Coulomb force can form a bound state called an exciton. It is an electrically neutral quasiparticle that exists mainly in condensed matter, including insulators, semiconductors, some metals, but also in certain atoms, molecules and liquids.
Die Elementarladung (Symbol: ) ist die kleinste frei existierende elektrische Ladungsmenge. Die Ladung freier Teilchen und von Materiemengen beträgt entweder Null oder ein ganzzahliges (positives oder negatives) Vielfaches von . So besitzen zum Beispiel das Elektron und das Myon die Ladung , ein Proton und ein Positron besitzen die Ladung .
The Planck constant, or Planck's constant, denoted by , [1] is a fundamental physical constant [1] of foundational importance in quantum mechanics: a photon 's energy is equal to its frequency multiplied by the Planck constant, and the wavelength of a matter wave equals the Planck constant divided by the associated particle momentum.
