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A satellite image of circular fields characteristic of center pivot irrigation, Kansas Farmland with circular pivot irrigation. Center-pivot irrigation (sometimes called central pivot irrigation), also called water-wheel and circle irrigation, is a method of crop irrigation in which equipment rotates around a pivot and crops are watered with sprinklers.
Super Soaker 50 The original mid-size weapon, the SS50 was a best-selling model. Known for its impressive range due to its novel air pressure system, the SS50 has become a cultural icon. In 2015, the SS50 was the model exemplified when the Super Soaker brand was nominated for the National Toy Hall of Fame. (730 mL tank volume, model year 1991)
A Feynman sprinkler, also referred to as a Feynman inverse sprinkler or reverse sprinkler, is a sprinkler-like device which is submerged in a tank and made to suck in the surrounding fluid. The question of how such a device would turn was the subject of an intense and remarkably long-lived debate.
Drip-irrigation systems employ small gaps at standard distances in a hose, leading to the slow trickle of water droplets which percolate the soil over a protracted period. These systems use 30 – 50% less water than conventional methods. [73] Soaker hoses help to reduce water use by up to 90%. [74]
As a teenager, Johnson attended Williamson High School, an all-black school in Mobile. [5] He drew much of his inspiration from George Washington Carver. [6] In 1968, Johnson represented his high school at a science fair in Alabama, where he was the only black student attending the fair; This was a time when African Americans had very little presence in science. [4]
In fluid dynamics, pipe network analysis is the analysis of the fluid flow through a hydraulics network, containing several or many interconnected branches. The aim is to determine the flow rates and pressure drops in the individual sections of the network.