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  2. Midland Railway Class 2 4-4-0 - Wikipedia

    en.wikipedia.org/wiki/Midland_Railway_Class_2_4-4-0

    The Midland Railway Class 2 4-4-0 was a series of 12 classes of 4-4-0 steam locomotives built by and for the Midland Railway between 1876 and 1901 while Samuel W. Johnson held the post of locomotive superintendent. They were designed for use on express passenger trains but later on were downgraded to secondary work when more powerful types were ...

  3. ISO 3166-1 alpha-2 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1_alpha-2

    The following is a complete list of the 249 current officially assigned ISO 3166-1 alpha-2 codes, with the following columns: [1] Code: ISO 3166-1 alpha-2 code, pointing to its ISO 3166-2 article; Country name: English short name officially used by the ISO 3166 Maintenance Agency (ISO 3166/MA) Year: Year when alpha-2 code was first officially ...

  4. Biopharmaceutics Classification System - Wikipedia

    en.wikipedia.org/wiki/Biopharmaceutics...

    BCS classes. According to the biopharmaceutics Classification System (BCS) drug substances are classified to four classes upon their solubility and permeability: [1] Class I - high permeability, high solubility. Example: metoprolol, paracetamol [2] Those compounds are well absorbed and their absorption rate is usually higher than excretion.

  5. Kardashev scale - Wikipedia

    en.wikipedia.org/wiki/Kardashev_scale

    The reaction of 1 kg of antimatter with 1 kg of matter would produce 1.8 × 10 17 J (180 petajoules) of energy. [85] Although antimatter is sometimes proposed as a source of energy, [86] this does not seem feasible. Artificially producing antimatter – according to current understanding of the laws of physics – involves first converting ...

  6. HAZMAT Class 6 Toxic and infectious substances - Wikipedia

    en.wikipedia.org/wiki/HAZMAT_Class_6_Toxic_and...

    Note 2: A liquid in Division 6.1 meeting criteria for Packing Group I, Hazard Zones A or B stated in paragraph (a)(2) of this section is a material poisonous by inhalation subject to the additional hazard communication requirements in 49CFR 172.203(m)(3), 49CFR 172.313 and Table 1 of 49CFR 172.504(e) of this subchapter.

  7. California bikeway classifications - Wikipedia

    en.wikipedia.org/wiki/California_bikeway...

    Another common application of Class I facilities is to close gaps to bicycle travel caused by construction of freeways or because of the existence of natural barriers (rivers, mountains, etc.).” [1] “off-roadway bike paths or bike trails” [2] Coyote Creek Trail, Ballona Creek Bike Path: Class II: BIKE LANE

  8. Laser safety - Wikipedia

    en.wikipedia.org/wiki/Laser_safety

    It only applies to visible-light lasers (400–700 nm). Class 2 lasers are limited to 1 mW continuous wave, or more if the emission time is less than 0.25 seconds or if the light is not spatially coherent. Intentional suppression of the blink reflex could lead to eye injury. Some laser pointers and measuring instruments are class 2.

  9. Classes of United States senators - Wikipedia

    en.wikipedia.org/wiki/Classes_of_United_States...

    Class 1 and class 2 consist of 33 seats each, while class 3 consists of 34 seats. Elections for class 1 seats are scheduled to take place in 2024, class 2 in 2026, and the elections for class 3 seats in 2028. The three classes were established by Article I, Section 3, Clause 2 of the U.S. Constitution.