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  2. Volute (pump) - Wikipedia

    en.wikipedia.org/wiki/Volute_(pump)

    Pump and volute casing. A volute is a curved funnel that increases in area as it approaches the discharge port. [1] The volute of a centrifugal pump is the casing that receives the fluid being pumped by the impeller, maintaining the velocity of the fluid through to the diffuser. As liquid exits the impeller it has high kinetic energy and the ...

  3. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    An electrically operated water pump is the prime motivator in recirculating the water from the pool. Water is forced through a filter and then returned to the pool. Using a water pump by itself is often not sufficient to completely sanitize a pool. Commercial and public pool pumps usually run 24 hours a day for the entire operating season of ...

  4. Salt water chlorination - Wikipedia

    en.wikipedia.org/wiki/Salt_water_chlorination

    Salt water chlorination is a process that uses dissolved salt (1000–4000 ppm or 1–4 g/L) for the chlorination of swimming pools and hot tubs.The chlorine generator (also known as salt cell, salt generator, salt chlorinator, or SWG) uses electrolysis in the presence of dissolved salt to produce chlorine gas or its dissolved forms, hypochlorous acid and sodium hypochlorite, which are already ...

  5. Oppermann's conjecture - Wikipedia

    en.wikipedia.org/wiki/Oppermann's_conjecture

    If the conjecture is true, then the gap size would be on the order of <. This also means there would be at least two primes between x 2 and (x + 1) 2 (one in the range from x 2 to x(x + 1) and the second in the range from x(x + 1) to (x + 1) 2), strengthening Legendre's conjecture that there is at least one prime in this range.

  6. Teacher Who Got Pregnant After Raping Boy, 12, Gets 25 ... - AOL

    www.aol.com/teacher-got-pregnant-raping-boy...

    A former Tennessee teacher who got pregnant after raping a 12-year-old boy pleaded guilty and has been sentenced to 25 years in prison with no parole. On Dec. 20, Alissa McCommon, 39, of Covington ...

  7. Trump Cabinet picks soften past statements under Senate ... - AOL

    www.aol.com/trump-cabinet-picks-soften-past...

    Some of President-elect Donald Trump’s most vulnerable Cabinet picks are racing to smooth out or overwrite past statements before contentious Senate confirmation fights.

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