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2. Bernoulli number - Wikipedia

   en.wikipedia.org/wiki/Bernoulli_number

   In mathematics, the Bernoulli numbers B n are a sequence of rational numbers which occur frequently in analysis.The Bernoulli numbers appear in (and can be defined by) the Taylor series expansions of the tangent and hyperbolic tangent functions, in Faulhaber's formula for the sum of m-th powers of the first n positive integers, in the Euler–Maclaurin formula, and in expressions for certain ...

3. Hardness comparison - Wikipedia

   en.wikipedia.org/wiki/Hardness_comparison

   ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

4. Bilateral hypergeometric series - Wikipedia

   en.wikipedia.org/wiki/Bilateral_hypergeometric...

   In mathematics, a bilateral hypergeometric series is a series Σa n summed over all integers n, and such that the ratio . a n /a n+1. of two terms is a rational function of n.The definition of the generalized hypergeometric series is similar, except that the terms with negative n must vanish; the bilateral series will in general have infinite numbers of non-zero terms for both positive and ...

5. Weibel instability - Wikipedia

   en.wikipedia.org/wiki/Weibel_instability

   The Lorentz force then bends the electron trajectories with the result that upward-moving-ev x B electrons congregate at B and downward-moving ones at A [clarification needed]. The resulting current j = − e n v e {\displaystyle j=-env_{e}} sheets generate magnetic field that enhances the original field and thus perturbation grows.

6. Norfolk and Western A class - Wikipedia

   en.wikipedia.org/wiki/Norfolk_and_Western_A_Class

   During testing, N&W officials were very impressed with their performance, as they were capable of pulling 4,800 tons at 25 mph on a 0.5% grade and 7,500 tons at 64 mph on level track. During World War II, the railroad built 25 more "A"s between 1943 and 1944 and finally eight more between 1949 and 1950.

7. Ina Garten's favorite Lodge cast iron pan is over 40% off ...

   www.aol.com/lifestyle/ina-gartens-favorite-lodge...

   We have an important announcement: Ina Garten's favorite cast iron pan is over 40% off. Now when Ina speaks, we listen. She is the queen (okay, the Contessa) of making life in the kitchen easy ...

8. List of national capitals by latitude - Wikipedia

   en.wikipedia.org/wiki/List_of_national_capitals...

   12.05 St. George's: Grenada: 12.1 N'Djamena: Chad: 12.12 Willemstad: Curaçao: Self-governing part of the Kingdom of the Netherlands: 12.13 Managua: Nicaragua: −12.18 West Island: Cocos (Keeling) Islands: External territory of Australia 12.35 Ouagadougou: Burkina Faso: 12.52 Oranjestad: Aruba: Self-governing part of the Kingdom of the ...

9. Smith & Wesson Model 12 - Wikipedia

   en.wikipedia.org/wiki/Smith_&_Wesson_Model_12

   [1] The Model 12 variants—12-1, 12-2, and 12-3—used a narrower hammer [4] and had an aluminum grip frame that was 0.08-inch (2.0 mm) narrower than the standard steel K-frame. [1] The final version, the Model 12-4, used the standard frame dimension [5] of the other K-frames. It also featured a rounded butt. Pre-Model 12: predates model ...