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  2. Ripple tank - Wikipedia

    en.wikipedia.org/wiki/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, i.e

  3. Leonardo's fighting vehicle - Wikipedia

    en.wikipedia.org/wiki/Leonardo's_fighting_vehicle

    However In the documentary "Da Vinci's Machines" (2009), a team of engineers and craftsmen undertook the challenge of reconstructing Leonardo da Vinci's design for an armored vehicle, commonly referred to as his tank, The successful operation and movement of the tank by fixing the purposely placed design flaw with the gearing not only validated ...

  4. Tank - Wikipedia

    en.wikipedia.org/wiki/Tank

    A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; their main armament is often mounted within a turret.

  5. History of the tank - Wikipedia

    en.wikipedia.org/wiki/History_of_the_tank

    Leonardo da Vinci sketch of his armored fighting vehicle. Leonardo da Vinci is often credited with the invention of a war machine that resembled a tank. [6] In the 15th century, a Hussite called Jan Žižka won several battles using armoured wagons containing cannons that could be fired through holes in their sides, but his invention was not used after his lifetime until the 20th century. [7]

  6. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.

  7. Down 2,000 Tanks, Russia Is Using Creative New Tactics to ...

    www.aol.com/lifestyle/down-2-000-tanks-russia...

    Down 2,000 tanks, Russia is using clever tactics to keep them alive. Here's how. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

  8. Sketch (drawing) - Wikipedia

    en.wikipedia.org/wiki/Sketch_(drawing)

    A line drawing is the most direct means of expression. This type of drawing without shading or lightness, is usually the first to be attempted by an artist.It may be somewhat limited in effect, yet it conveys dimension, movement, structure and mood; it can also suggest texture to some extent.

  9. Cyber Monday just started: We're tracking the 85 best ... - AOL

    www.aol.com/from-post-black-friday-to-early...

    Amazon: Up to 30% off pet collars, smart cameras, pet food, flea collars, and more. Litter-Robot: $100 off bundles on the best-selling self-cleaning litter box. Petco: Buy one get one free on dog ...