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  2. Quantum foam - Wikipedia

    en.wikipedia.org/wiki/Quantum_foam

    Quantum foam (or spacetime foam, or spacetime bubble) is a theoretical quantum fluctuation of spacetime on very small scales due to quantum mechanics. The theory predicts that at this small scale, particles of matter and antimatter are constantly created and destroyed.

  3. Metal foam - Wikipedia

    en.wikipedia.org/wiki/Metal_foam

    Open-cell metal foam CFD (numerical) simulation of fluid flow and heat transfer on an open cell metal foam. Open-celled metal foam, also called metal sponge, [3] can be used in heat exchangers (compact electronics cooling, cryogen tanks, PCM heat exchangers), energy absorption, flow diffusion, CO 2 scrubbers, flame arrestors, and lightweight optics. [4]

  4. Quadrant (plane geometry) - Wikipedia

    en.wikipedia.org/wiki/Quadrant_(plane_geometry)

    Signs of trigonometric functions in each quadrant. In the above graphic, the words in quotation marks are a mnemonic for remembering which three trigonometric functions (sine, cosine and tangent) are positive in each quadrant. The expression reads "All Science Teachers Crazy" and proceeding counterclockwise from the upper right quadrant, we see ...

  5. Quadrant (instrument) - Wikipedia

    en.wikipedia.org/wiki/Quadrant_(instrument)

    A large frame quadrant at the Beijing Ancient Observatory.It was constructed in 1673. A quadrant is an instrument used to measure angles up to 90°.Different versions of this instrument could be used to calculate various readings, such as longitude, latitude, and time of day.

  6. Titanium foam - Wikipedia

    en.wikipedia.org/wiki/Titanium_foam

    Computer tomography (a) and electron micrograph (b) of the Ti foam made with saccharose as a space holder, showing two types of pores in titanium foam. The selection of the space-holder is one of the most crucial steps because it defines many of the properties of the resulting foam, including cell shape, cell size and macroporosity.

  7. AOL Mail for Verizon Customers - AOL Help

    help.aol.com/products/aol-mail-verizon

    AOL Mail welcomes Verizon customers to our safe and delightful email experience!

  8. RTV silicone - Wikipedia

    en.wikipedia.org/wiki/RTV_silicone

    RTV silicone rubbers are, however, generally expensive – especially platinum-cure. They are also sensitive to substances (sulfur-containing modelling clay such as Plastilina, for example) that may prevent the silicone from curing (referred to as cure inhibition). Silicones are usually very thick (high viscosity), and must be vacuum degassed ...

  9. Axel Welin - Wikipedia

    en.wikipedia.org/wiki/Axel_Welin

    He invented a new and improved davit for lowering boats on board ship, a quadrant davit for double-banked boats which simply became known as the Welin davit. The RMS Titanic was equipped with Welin davits, [1] and after the disaster the demand for his product skyrocketed. He was awarded the John Scott Medal of The Franklin Institute in 1911. He ...

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