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  2. File:Rutherford gold foil experiment results.svg - Wikipedia

    en.wikipedia.org/wiki/File:Rutherford_gold_foil...

    English: Top: Expected results of Rutherford's gold foil experiment: alpha particles passing through the plum pudding model of the atom undisturbed. Bottom: Observed results: Some of the particles were deflected, and some by very large angles. Rutherford concluded that the positive charge of the atom must be concentrated into a very small ...

  3. Rutherford scattering experiments - Wikipedia

    en.wikipedia.org/wiki/Rutherford_scattering...

    The tube was evacuated to different amounts and a series of images recorded. At the lowest pressure the image of the open slit was clear, while images of the mica covered slit or the open slit at higher pressures were fuzzy. Rutherford explained these results as alpha-particle scattering [9]: 260 in a paper published in 1906. [35]

  4. Speech balloon - Wikipedia

    en.wikipedia.org/wiki/Speech_balloon

    Speech balloons (also speech bubbles, dialogue balloons, or word balloons) are a graphic convention used most commonly in comic books, comics, and cartoons to allow words (and much less often, pictures) to be understood as representing a character's speech or thoughts.

  5. History of chemistry - Wikipedia

    en.wikipedia.org/wiki/History_of_chemistry

    The earliest recorded metal employed by humans seems to be gold, which can be found free or "native". Small amounts of natural gold have been found in Spanish caves used during the late Paleolithic period, around 40,000 BC. [5] The earliest gold metallurgy is known from the Varna culture in Bulgaria, dating from c. 4600 BC. [6]

  6. Screen printing - Wikipedia

    en.wikipedia.org/wiki/Screen_printing

    Screen printing is a printing technique where a mesh is used to transfer ink (or dye) onto a substrate, except in areas made impermeable to the ink by a blocking stencil.A blade or squeegee is moved across the screen in a "flood stroke" to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact.

  7. Tin foil hat - Wikipedia

    en.wikipedia.org/wiki/Tin_foil_hat

    A tin foil hat is a hat made from one or more sheets of tin foil or aluminium foil, or a piece of conventional headgear lined with foil, often worn in the belief or hope that it shields the brain from threats such as electromagnetic fields, mind control, and mind reading.

  8. Foil (metal) - Wikipedia

    en.wikipedia.org/wiki/Foil_(metal)

    A foil is a very thin sheet of metal, typically made by hammering or rolling. [ 1 ] [ 2 ] Foils are most easily made with malleable metal, such as aluminium , copper , [ 3 ] tin , and gold . Foils usually bend under their own weight and can be torn easily. [ 2 ]

  9. Leyden jar - Wikipedia

    en.wikipedia.org/wiki/Leyden_jar

    The foil coatings stop short of the mouth of the jar, to prevent the charge from arcing between the foils. A metal rod electrode projects through the nonconductive stopper at the mouth of the jar, electrically connected by some means (usually a hanging chain) to the inner foil, to allow it to be charged.

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