Download
Close

Автор:
id:
Ключевые слова:
background, black, calculate, calculation, college, complex, concept, constant, education, electron, exam, formula, function, hole, homework, knowledge, learn, math, mathematics, neutrino, neutron, nuclear, nucleus, number, paper, physics, planck, positron, problem, proton, quantum, quark, school, science, scientific, sheet, study, studying, symbol, teacher, test, theory, university, write,