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  2. U.S. Army Corps of Engineers Bay Model - Wikipedia

    en.wikipedia.org/wiki/U.S._Army_Corps_of...

    The scale of the model is 1:1000 on the horizontal axis and 1:100 on the vertical axis. The model operates at a time scale of 1:100. [6] The model is distorted by a factor of ten between the horizontal and vertical scales. The distortion is designed into the model to ensure a proper hydraulic flow over the tidal flats and shallows.

  3. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.

  4. Troubleshooting - Wikipedia

    en.wikipedia.org/wiki/Troubleshooting

    Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system.It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again.

  5. Quark model - Wikipedia

    en.wikipedia.org/wiki/Quark_model

    All quarks are assigned a baryon number of ⁠ 1 / 3 ⁠. Up, charm and top quarks have an electric charge of + ⁠ 2 / 3 ⁠, while the down, strange, and bottom quarks have an electric charge of − ⁠ 1 / 3 ⁠. Antiquarks have the opposite quantum numbers. Quarks are spin-⁠ 1 / 2 ⁠ particles, and thus fermions. Each quark or antiquark ...

  6. San Diego Model Railroad Museum - Wikipedia

    en.wikipedia.org/wiki/San_Diego_Model_Railroad...

    At 27,000 sq. ft., it is the largest model railroad museum in North America. It was visited by nearly three million people in its first three decades. [3] The museum is a 501(c)(3) organization non-profit charity. A model of the San Diego Union Station at the San Diego Model Railroad Museum along with a number of model trains.

  7. List of quantum-mechanical systems with analytical solutions

    en.wikipedia.org/wiki/List_of_quantum-mechanical...

    The Mie potential [5] The Hooke's atom; The Morse potential; The Spherium atom; Zero range interaction in a harmonic trap [6] Multistate Landau–Zener models [7] The Luttinger liquid (the only exact quantum mechanical solution to a model including interparticle interactions)

  8. Category:Models from California - Wikipedia

    en.wikipedia.org/.../Category:Models_from_California

    Pages in category "Models from California" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. L. Carol LaBrie;

  9. Thomson problem - Wikipedia

    en.wikipedia.org/wiki/Thomson_problem

    geodesic sphere {3,5+} 3,3: 282 37147.294418462 0 0 0 12 270 0 0 840 560 0 12.166° geodesic sphere {3,5+} 4,2: 292 39877.008012909 0 0 0 12 280 0 0 870 580 0 11.857° 306 43862.569780797 0 0 0 12 294 0 0 912 608 0 11.628° 312 45629.313804002 0.000306163 0 0 12 300 0 0