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  2. Conservation and restoration of paintings - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    The conservation and restoration of paintings is carried out by professional painting conservators. Paintings cover a wide range of various mediums, materials, and their supports (i.e. the painted surface made from fabric, paper, wood panel, fabricated board, or other). Painting types include fine art to decorative and functional objects ...

  3. Energy efficiency in transport - Wikipedia

    en.wikipedia.org/wiki/Energy_efficiency_in_transport

    Hydrogen production efficiency are 50–70% when produced from natural gas, and 10–15% from electricity. [ citation needed ] The efficiency of hydrogen production, as well as the energy required to store and transport hydrogen, must to be combined with the vehicle efficiency to yield net efficiency. [64]

  4. Fracking - Wikipedia

    en.wikipedia.org/wiki/Fracking

    Fracking (also known as hydraulic fracturing, fracing, hydrofracturing, or hydrofracking) is a well stimulation technique involving the fracturing of formations in bedrock by a pressurized liquid. The process involves the high-pressure injection of "fracking fluid" (primarily water, containing sand or other proppants suspended with the aid of ...

  5. Calculator added up to fun for a math phobic kid in the ... - AOL

    www.aol.com/calculator-added-fun-math-phobic...

    The Texas Instruments TI-30 calculator retailed for $24.95 in 1976 at O’Neil's department store in Akron.

  6. Oil depletion - Wikipedia

    en.wikipedia.org/wiki/Oil_depletion

    Oil depletion. Oil depletion is the decline in oil production of a well, oil field, or geographic area. [1] The Hubbert peak theory makes predictions of production rates based on prior discovery rates and anticipated production rates. Hubbert curves predict that the production curves of non-renewing resources approximate a bell curve.

  7. Art forgery - Wikipedia

    en.wikipedia.org/wiki/Art_forgery

    Compare to Goya's May tree. Art forgery is the creation and sale of works of art which are falsely credited to other, usually more famous artists. Art forgery can be extremely lucrative, but modern dating and analysis techniques have made the identification of forged artwork much simpler.