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The most commonly used insulation type in AC electrical distribution systems throughout North America is THHN ("Thermoplastic High Heat-resistant Nylon-coated" [17]). This is a specification for PVC insulation (other thermoplastics are permitted, but rarely used) with a nylon jacket for abrasion resistance. THHN is suitable for dry or damp ...
UVM2 = 231 nm UVW1 = 291 nm U = 344 nm B = 450 nm V = 543 nm XMM-Newton Optical/UV Monitor [22] XEST Survey UVW2 = 212 nm UVM2 = 231 nm UVW1 = 291 nm U = 344 nm B = 450 nm V = 543 nm J = 1.25 μm H = 1.65 μm K s = 2.15 μm Survey includes the point source of 2MASS with XMM-Newton OM [23]
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nM nanomolar 10 9 M GM gigamolar 10 −12 M pM picomolar 10 12 M TM teramolar 10 −15 M fM femtomolar 10 15 M PM petamolar 10 −18 M aM attomolar 10 18 M EM examolar 10 −21 M zM zeptomolar 10 21 M ZM zettamolar 10 −24 M yM yoctomolar 10 24 M YM yottamolar 10 −27 M rM rontomolar 10 27 M RM ronnamolar 10 −30 M qM quectomolar 10 30 M QM
The lumen is defined to be unity for a radiant energy of 1/683 W at a frequency of 540 THz, which corresponds to a standard air wavelength of 555.016 nm rather than 555 nm, which is the peak of the luminosity curve. The value of y (λ) is 0.999 997 at 555.016 nm, so that a value of 683/ 0.999 997 = 683.002 is the multiplicative constant. [3]
A mesoporous material (or super nanoporous [2]) is a nanoporous material containing pores with diameters between 2 and 50 nm, according to IUPAC nomenclature. [3] For comparison, IUPAC defines microporous material as a material having pores smaller than 2 nm in diameter and macroporous material as a material having pores larger than 50 nm in ...
The road, off NM 522, runs through Bureau of Land Management property and is known as John Dunn Bridge Road and County Road B-007. [ 2 ] An 18-mile (29 km) portion of the Rio Grande called the "Taos Box" is used for whitewater rafting between the John Dunn Bridge, at the northern end, and the Taos Junction Bridge.
Most records are subject to ratification by the governing body for that record. On the world level, that is World Athletics.Each body has their own procedure for ratifying the records: for example, USA Track & Field (USATF), the governing body for the United States, only ratifies records once a year at their annual meeting at the beginning of December.