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  2. Olympic-size swimming pool - Wikipedia

    en.wikipedia.org/wiki/Olympic-size_swimming_pool

    An Olympic-size swimming pool is a swimming pool which conforms to the regulations for length, breadth, and depth made by World Aquatics (formerly FINA) for swimming at the Summer Olympics and the swimming events at the World Aquatics Championships. Different size regulations apply for other pool-based events, such as diving, synchronized ...

  3. Parakrama Samudra - Wikipedia

    en.wikipedia.org/wiki/Parakrama_Samudra

    58.5 m (192 ft) Parakrama Samudra (or King Parakrama's sea or the Sea of King Parakrama) is a shallow reservoir (wewa), consisting of five separate wewa (reservoirs) (thopa, dumbutulu, erabadu, bhu, kalahagala tanks) connected by narrow channels in Polonnaruwa, Sri Lanka. The northernmost reservoir is the oldest and referred to as Topa wewa ...

  4. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    An especially common rental cylinder provided at tropical dive resorts is the "aluminium-S80" which is an aluminium cylinder design with an internal volume of 0.39 cubic feet (11.0 L) rated to hold a nominal volume of 80 cubic feet (2,300 L) of atmospheric pressure gas at its rated working pressure of 3,000 pounds per square inch (207 bar). [9]

  5. Well control - Wikipedia

    en.wikipedia.org/wiki/Well_control

    Consider two wells, X and Y. Well X has a measured depth of 9,800 ft and a true vertical depth of 9,800 ft while well Y has measured depth of 10,380 ft while its true vertical depth is 9,800 ft. To calculate the hydrostatic pressure of the bottom hole, the true vertical depth is used because gravity acts (pulls) vertically down the hole. [2]

  6. Fracking - Wikipedia

    en.wikipedia.org/wiki/Fracking

    Hydraulic fracturing uses between 1.2 and 3.5 million US gallons (4,500 and 13,200 m 3) of water per well, with large projects using up to 5 million US gallons (19,000 m 3). [171] Additional water is used when wells are refractured. [75] [172] An average well requires 3 to 8 million US gallons (11,000 to 30,000 m 3) of water over its lifetime. [67]

  7. Ripple tank - Wikipedia

    en.wikipedia.org/wiki/Ripple_tank

    Ripple tank. A simple ripple tank. In physics, a ripple tank is a shallow glass tank of water used to demonstrate the basic properties of waves. It is a specialized form of a wave tank. The ripple tank is usually illuminated from above, so that the light shines through the water. Some small ripple tanks fit onto the top of an overhead projector ...

  8. K2 Black Panther - Wikipedia

    en.wikipedia.org/wiki/K2_Black_Panther

    Maximum speed. Paved road: 70 km/h (43 mph) Cross country: 50 km/h (31 mph) [5] Acceleration from 0–32 km/h (0–20 mph) in 7.47 seconds (MT883 Ka-501) or 8.77 seconds (DV27K) K2 Black Panther (Korean: K-2 흑표; Hanja: K-2 黑豹; RR: K-2 Heukpyo) is a South Korean main battle tank (MBT), designed by the Agency for Defense Development and ...

  9. Shallow water equations - Wikipedia

    en.wikipedia.org/wiki/Shallow_water_equations

    The shallow-water equations (SWE) are a set of hyperbolic partial differential equations (or parabolic if viscous shear is considered) that describe the flow below a pressure surface in a fluid (sometimes, but not necessarily, a free surface). [1] The shallow-water equations in unidirectional form are also called (de) Saint-Venant equations ...

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