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2. Tempered glass - Wikipedia

   en.wikipedia.org/wiki/Tempered_glass

   Tempered glass can be made from annealed glass via a thermal tempering process. The glass is placed onto a roller table, taking it through a furnace that heats it well above its transition temperature of 564 °C (1,047 °F) to around 620 °C (1,148 °F). The glass is then rapidly cooled with forced air drafts while the inner portion remains ...

3. Laminated glass - Wikipedia

   en.wikipedia.org/wiki/Laminated_glass

   Automobile windshield with "spider web" cracking typical of laminated safety glass. Laminated glass is a type of safety glass consisting of two or more layers of glass with one or more thin polymer interlayers between them which prevent the glass from breaking into large sharp pieces. [1]

4. Screen protector - Wikipedia

   en.wikipedia.org/wiki/Screen_protector

   Plastic screen protectors cost less than glass and are thinner (around 0.1 mm (0.004 in) thick, compared to 0.3 to 0.5 mm (0.012 to 0.020 in) for glass) [2] and more flexible. At the same price, glass will resist scratches better than plastic, and feel more like the device's screen, though higher priced plastic protectors may be better than the ...

5. Space Shuttle thermal protection system - Wikipedia

   en.wikipedia.org/wiki/Space_Shuttle_thermal...

   This technique, called heat sink thermal protection, was planned for the X-20 Dyna-Soar winged space vehicle. [1] However, the amount of high-temperature metal required to protect a large vehicle like the Space Shuttle Orbiter would have been very heavy and entailed a severe penalty to the vehicle's performance.

6. Cribbing (horse) - Wikipedia

   en.wikipedia.org/wiki/Cribbing_(horse)

   Cribbing is a form of stereotypy (equine oral stereotypic behaviour), otherwise known as wind sucking or crib-biting. Cribbing is considered to be an abnormal, compulsive behavior seen in some horses, and is often labelled a stable vice. The major factors that cause cribbing include stress, stable management, genetic and gastrointestinal ...

7. List of refractive indices - Wikipedia

   en.wikipedia.org/wiki/List_of_refractive_indices

   Some representative refractive indices; Name of material λ (nm) Refractive index no. n Reference Vacuum: 1 (by definition) Air at STP: 1.000273 [citation needed]Gases at 0 °C and 1 atm