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  2. Pennsylvania Railroad class T1 - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Railroad_class_T1

    This reduced the tractive effort, from nearly 65,000 lbs to just over 58,000 lbs. [22] 6110 was similarly treated, as were 7 of the production T1's. Two T1's received different alternative forms of valve gear. 5500 was rebuilt following an accident in 1948 with Franklin Type B-2 valve gear, replacing the original oscillating cams with rotary cams.

  3. Vehicle weight - Wikipedia

    en.wikipedia.org/wiki/Vehicle_weight

    Curb weight (American English) or kerb weight (British English) is the total mass of a vehicle with standard equipment and all necessary operating consumables such as motor oil, transmission oil, brake fluid, coolant, air conditioning refrigerant, and sometimes a full tank of fuel, while not loaded with either passengers or cargo.

  4. Pound (mass) - Wikipedia

    en.wikipedia.org/wiki/Pound_(mass)

    The equivalence for the pound was given as 1 lb = 453.592 65 g or 0.45359 kg, which made the kilogram equivalent to about 2.204 6213 lb. In 1883, it was determined jointly by the standards department of the British Board of Trade and the Bureau International that 0.453 592 4277 kg was a better approximation, and this figure, rounded to 0.453 ...

  5. Roblox - Wikipedia

    en.wikipedia.org/wiki/ROBLOX

    Roblox (/ ˈ r oʊ b l ɒ k s / ⓘ, ROH-bloks) is an online game platform and game creation system developed by Roblox Corporation that allows users to program and play games created by themselves or other users. It was created by David Baszucki and Erik Cassel in 2004, and released to the public in 2006. As of August 2020, the platform has ...

  6. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    "The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J s , which is equal to kg m 2 s −1 , where the metre and the second are defined in terms of c and ∆ ν Cs ."

  7. R211 (New York City Subway car) - Wikipedia

    en.wikipedia.org/wiki/R211_(New_York_City_Subway...

    The R211 is a class of New Technology Train (NTT) subway cars built for the New York City Transit Authority.Being built by Kawasaki Railcar Manufacturing for the B Division of the New York City Subway and for the Staten Island Railway (SIR), they will replace two aging subway car models: all R44 cars on the SIR, plus all R46 and some R68 subway cars.

  8. Anti-aircraft warfare - Wikipedia

    en.wikipedia.org/wiki/Anti-aircraft_warfare

    Anti-aircraft warfare is the counter to aerial warfare [1] and includes "all measures designed to nullify or reduce the effectiveness of hostile air action". [2] It encompasses surface-based, subsurface (submarine-launched), and air-based weapon systems, in addition to associated sensor systems, command and control arrangements, and passive measures (e.g. barrage balloons).

  9. Gaia (spacecraft) - Wikipedia

    en.wikipedia.org/wiki/Gaia_(spacecraft)

    Gaia is a space observatory of the European Space Agency (ESA) that was launched in 2013 and is planned to operate until March 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, [5] [6] and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent magnitude and color. [7]