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Melting point: 141.3 °C (pure), 140–141 °C (technical) Trauzl lead block test : 523 cm 3 (other values: 500 cm 3 when sealed with sand, or 560 cm 3 when sealed with water) Critical diameter (minimal diameter of a rod that can sustain detonation propagation): 0.9 mm for PETN at 1 g/cm 3 , smaller for higher densities (other value: 1.5 mm)
In the belts, at a given point, the flux of particles of a given energy decreases sharply with energy. At the magnetic equator , electrons of energies exceeding 5000 keV (resp. 5 MeV) have omnidirectional fluxes ranging from 1.2×10 6 (resp. 3.7×10 4 ) up to 9.4×10 9 (resp. 2×10 7 ) particles per square centimeter per second.
In a piezoelectric device, mechanical stress, instead of an externally applied voltage, causes the charge separation in the individual atoms of the material. Of the 32 crystal classes , 21 are non- centrosymmetric (not having a centre of symmetry), and of these, 20 exhibit direct piezoelectricity [ 25 ] (the 21st is the cubic class 432).
[16] [17] [18] It is a state of matter in which an ionized substance becomes highly electrically conductive to the point that long-range electric and magnetic fields dominate its behaviour. [19] [20] Plasma is typically an electrically quasineutral medium of unbound positive and negative particles (i.e., the overall charge of a plasma is ...
Fake news is false or misleading information presented as news. [10] [16] The term as it developed in 2017 is a neologism (a new or re-purposed expression that is entering the language, driven by culture or technology changes). [17]
The charge carrier concentration is proportional to the applied voltage. Graphene is neutral at zero gate voltage and resistivity is at its maximum because of the dearth of charge carriers. The rapid fall of resistivity when carriers are injected shows their high mobility, here of the order of 5000 cm 2 /Vs. n-Si/SiO 2 substrate, T=1K.
PCl 3 + 6 Na + 3 C 6 H 5 Cl → P(C 6 H 5) 3 + 6 NaCl. Treatment of phosphorus trihalides with alcohols and phenols gives phosphites, e.g. triphenylphosphite: PCl 3 + 3 C 6 H 5 OH → P(OC 6 H 5) 3 + 3 HCl. Similar reactions occur for phosphorus oxychloride, affording triphenylphosphate: OPCl 3 + 3 C 6 H 5 OH → OP(OC 6 H 5) 3 + 3 HCl
6.7 kJ/mol at –87.0 °C crystal II → crystal I Entropy of transition, Δ trs S o: 36 J/(mol·K) at –87.0 °C crystal II → crystal I Liquid properties Std enthalpy change of formation, Δ f H o liquid –156.4 kJ/mol Standard molar entropy, S o liquid: 204 J/(mol K) Enthalpy of combustion, Δ c H o –3919.6 kJ/mol Heat capacity, c p