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"The slug is a derived unit of mass in a weight-based system of measures, most notably within the British Imperial measurement system and in the United States customary measures system. Systems of measure either define mass and derive a force unit or define a base force and derive a mass unitSee Elementary High School physics and chemistry text books/fundamentals. (cf. poundal, a derived unit of force in a force-based system). A slug is defined as the mass that is accelerated by 1 ft/s2 when a force of one pound (lbf) is exerted on it. : 1~\text{slug} = 1~\text{lbf}{\cdot}\frac{\text{s}^2}{\text{ft}} \quad\Longleftrightarrow\quad 1~\text{lbf} = 1~\text{slug}{\cdot}\frac{\text{ft}}{\text{s}^2} One slug is a mass equal to based on standard gravity, the international foot, and the avoirdupois pound.Shigley, Joseph E. and Mischke, Charles R. Mechanical Engineering Design, Sixth ed, pp. 31–33. McGraw Hill, 2001. . At the Earth's surface, an object with a mass of 1 slug exerts a force downward of approximately 32.2 lbf or .Beckwith, Thomas G., Roy D. Marangoni, et al. Mechanical Measurements, Fifth ed, pp. 34-36. Addison-Wesley Publishing, 1993. .Shevell, R.S. Fundamentals of Flight, Second ed, p. xix. Prentice-Hall, 1989. History The slug is part of a subset of units known as the gravitational FPS system, one of several such specialized systems of mechanical units developed in the late 19th and the 20th century. Geepound was another name for this unit in early literature.gee. unit2unit.eu The name "slug" was coined before 1900 by British physicist Arthur Mason Worthington, but it did not see any significant use until decades later. It is derived from the meaning "solid block of metal", not from the slug mollusc. A 1928 textbook says: The slug is listed in the Regulations under the Weights and Measures (National Standards) Act, 1960. This regulation defines the units of weights and measures, both regular and metric, in Australia. Related units The blob is the inch version of the slug (1blob is equal to 1 lbf⋅s2/in, or 12slugs)Norton, Robert L. Cam Design and Manufacturing Handbook, p. 13. Industrial Press Inc., 2009. . or equivalent to . This unit is also called slinch (a portmanteau of the words slug and inch).Slug. DiracDelta Science & Engineering Encyclopedia Similar terms include slugetteCelmer, Robert. Notes to Accompany Vibrations II. Version 2.2. 2009. and snail.Rowlett, Russ. "How Many? A Dictionary of Units of Measurement". unc.edu, September 1, 2004. Retrieved January 26, 2018. Similar metric units include the glug in the centimetre–gram–second system, and the mug, par, or MTE in the metre–kilogram–second system. See also * British Engineering Units References External links * "What is a Slug?" on phy-astr.gsu.edu Category:Imperial units Category:Units of mass "
"The name Frances was used for eight tropical cyclones in the Atlantic Ocean. It was even with Arlene as the most-used Atlantic storm name, but fell to second place when Arlene was used for the first storm of the 2005 season. * Hurricane Frances (1961): Caused flooding in Puerto Rico, peaked at Category 3 west of Bermuda, subtropical at Nova Scotia * Tropical Storm Frances (1968): Travelled across the central Atlantic Ocean without affecting land * Hurricane Frances (1976): Curved over the central Atlantic, affected the Azores as an extratropical storm * Hurricane Frances (1980): Travelled up the central Atlantic Ocean without affecting land * Hurricane Frances (1986): Briefly drifted over the western Atlantic but never affected land * Hurricane Frances (1992): Threatened Bermuda but did not strike the island, then hit Spain as an extratropical storm * Tropical Storm Frances (1998): A weak storm that caused flooding in East Texas and southern Louisiana * Hurricane Frances (2004): A powerful Category 4 hurricane that struck the Bahamas, and later, as a Category 2 storm, moved extremely slowly over Florida, causing billions in damage After the 2004 season, the name Frances was retired and replaced by Fiona in the 2010 season. The name Frances has also been used once in the Australian region. * Cyclone Frances (2017) Category:Atlantic hurricane disambiguation pages Category:Australian region cyclone disambiguation pages "
"A slug is a term used for a bulky solid ballistic projectile. It is "solid" in the sense of being composed of one piece; the shape can vary widely, including partially hollowed shapes. The term is occasionally applied to bullets (just the projectile, never the cartridge as a whole), but is most commonly applied to one-piece shotgun projectiles, to differentiate them from shotshells containing shots. Slugs are commonly fired from choked smoothbore barrels, but some specially-designed slug barrels have riflings that can impart gyroscopic spin required for in-flight stability. An airgun slug is a new type of pellet recently developed for pre-charged pneumatic airguns. Unlike the conventional diabolo-shaped pellet, which is aerodynamically poor and relies heavily on drag-stabilisation to maintain accuracy, the slug pellet is cylindro- conoidally shaped like a Minié ball and relies predominantly on spin- stabilisation from a rifled barrel. Because of the greater contact area with the barrel bore, these pellets require more power from the gun to overcome the frictional resistance, and therefore are mainly used in PCP airguns, which generally have much higher muzzle energy ratings than other types of airguns such as spring-piston, pump pneumatic or HPA/CO2 airguns. A water-slug refers to operating a submarine's torpedo tube that has been filled with water rather than a torpedo, thus shooting a "slug of water." In simulated naval battles and exercises this is to represent the dispatch of an actual torpedo as, to sonar detectors, the sounds are very alike. See also *Shotgun slug References Category:Projectiles Category:Shotgun shells Category:Ammunition "