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  2. Tempered glass - Wikipedia

    en.wikipedia.org/wiki/Tempered_glass

    [1] [2] The more rapid contraction of the outer layer during manufacturing induces compressive stresses in the surface of the glass balanced by tensile stresses in the body of the glass. Fully tempered 6-mm thick glass must have either a minimum surface compression of 69 MPa (10 000 psi) or an edge compression of not less than 67 MPa (9 700 psi ...

  3. Nike Cortez - Wikipedia

    en.wikipedia.org/wiki/Nike_Cortez

    The Nike Cortez is the first track shoe released by Nike in 1972, and is therefore thought to be a significant aspect to the success of the company. The Nike Cortez was first designed by Nike co-founder Bill Bowerman , [ 2 ] aiming to produce a comfortable and durable running shoe for distance training and road running.

  4. Borosilicate glass - Wikipedia

    en.wikipedia.org/wiki/Borosilicate_glass

    The B 2 O 3 content for borosilicate glass is typically 12–13% and the SiO 2 content over 80%. High chemical durability and low thermal expansion (3.3 × 10 −6 K −1) – the lowest of all commercial glasses for large-scale technical applications – make this a versatile glass material. High-grade borosilicate flat glasses are used in a ...

  5. Clapping - Wikipedia

    en.wikipedia.org/wiki/Clapping

    Clapping hand. A clap is the percussive sound made by striking together two flat surfaces, as in the body parts of humans or animals. Humans clap with the palms of their hands, often quickly and repeatedly to express appreciation or approval (see applause), but also in rhythm as a form of body percussion to match the sounds in music, dance, chants, hand games, and clapping games.

  6. Annealing (glass) - Wikipedia

    en.wikipedia.org/wiki/Annealing_(glass)

    Annealing is a process of slowly cooling hot glass objects after they have been formed, to relieve residual internal stresses introduced during manufacture. Especially for smaller, simpler objects, annealing may be incidental to the process of manufacture, but in larger or more complex products it commonly demands a special process of annealing in a temperature-controlled kiln known as a lehr. [1]

  7. Nike Mag - Wikipedia

    en.wikipedia.org/wiki/Nike_Mag

    The Nike MAG is a limited-edition shoe created by Nike Inc. [1] It is a replica of a self-tying shoe featured in the film Back to the Future Part II. The Nike Mag was originally released for sale in 2011 and again in 2016. Both launches were in limited quantities. The 2011 release was limited to 1,510 pairs, while the 2016 release was limited ...

  8. Photosensitive glass - Wikipedia

    en.wikipedia.org/wiki/Photosensitive_glass

    The latent image captured in the glass is made visible by heating. [6] [2] [4] This heat treatment is done by raising the temperature to about 500 °C to allow the oxidation-reduction reaction to form silver nanoclusters. Following this, the temperature is raised to 550–560 °C and lithium metasilicate (Li 2 SiO 3) forms on the silver ...

  9. Satan Shoes - Wikipedia

    en.wikipedia.org/wiki/Satan_Shoes

    A detail from Jan van Eyck's Crucifixion and Last Judgement diptych (pictured) appears to be present on the shoebox. [1]Each pair of shoes is black, and features a bronze pentagram on the laces and an inverted cross, [2] while on the sides of the shoes is a reference to the Biblical passage Luke 10:18. [3]