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2. Total dynamic head - Wikipedia

   en.wikipedia.org/wiki/Total_dynamic_head

   In fluid dynamics, total dynamic head (TDH) is the work to be done by a pump, per unit weight, per unit volume of fluid.TDH is the total amount of system pressure, measured in feet, where water can flow through a system before gravity takes over, and is essential for pump specification.

3. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   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 the pool. Residential pool pumps are typically run for 4 hours per day in winter (when the pool is not ...

4. Specific speed - Wikipedia

   en.wikipedia.org/wiki/Specific_speed

   Specific speed N s, is used to characterize turbomachinery speed. [1] Common commercial and industrial practices use dimensioned versions which are of equal utility. Specific speed is most commonly used in pump applications to define the suction specific speed —a quasi non-dimensional number that categorizes pump impellers as to their type and proportions.

5. HP calculators - Wikipedia

   en.wikipedia.org/wiki/HP_calculators

   HP's first scientific calculator, HP-35 With this in mind, HP built the HP 9100 desktop scientific calculator. This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions , logarithms, exponentiation, and square roots .

6. Essence Atkins Says Showing Up for Tia Mowry amid Her Divorce ...

   www.aol.com/essence-atkins-says-showing-tia...

   The How High actress shares one son, Varro, with ex-husband Jaime Mendez.She and the former football player, 53, were married from 2009 to 2016. “Even if it's what's necessary, if there's a way ...

7. Pittsburgh Pirates present outrageous offer in exchange for ...

   www.aol.com/sports/pittsburgh-pirates-present...

   Skenes, a finalist for NL Rookie of the Year, is one of the best young players in the league and will be a key part of the Pirates' rotation going forward.His rookie campaign was one to remember ...