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  2. Tongue and groove - Wikipedia

    en.wikipedia.org/wiki/Tongue_and_groove

    Tongue-in-groove is similar to tongue and groove, but instead of the tongue forming part of one of the edges, it is a separate, loose piece that fits between two identically grooved edges.

  3. Polyethylene terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polyethylene_terephthalate

    [clarification needed] Transparent products can be produced by rapidly cooling molten polymer below the glass transition temperature (T g) to form a non-crystalline amorphous solid. [34] Like glass, amorphous PET forms when its molecules are not given enough time to arrange themselves in an orderly, crystalline fashion as the melt is cooled.

  4. List of poker hands - Wikipedia

    en.wikipedia.org/wiki/List_of_poker_hands

    Five of a kind, aces, A ♥ A ♦ A ♣ A ♠ Jkr, becomes possible when a joker is added to the deck as a bug, a form of wild card that may act as a fifth ace. [5] Other wild card rules allow jokers or other designated cards to represent any card in the deck, making it possible to form five of a kind of any rank.

  5. Beechcraft T-6 Texan II - Wikipedia

    en.wikipedia.org/wiki/Beechcraft_T-6_Texan_II

    The Model 3000/T-6 is a low-wing cantilever monoplane with enclosed tandem seating for two. It is powered by a single Pratt & Whitney Canada PT6A-68 turboprop engine in tractor configuration with an aluminum, 97-inch (8.1 ft; 2.5 m), four-blade, constant-speed, variable pitch, non-reversing, feathering propeller assembly and has retractable tricycle landing gear.

  6. Spanning tree - Wikipedia

    en.wikipedia.org/wiki/Spanning_tree

    The term t(G − e) in this formula counts the spanning trees of G that do not use edge e, and the term t(G/e) counts the spanning trees of G that use e. In this formula, if the given graph G is a multigraph , or if a contraction causes two vertices to be connected to each other by multiple edges, then the redundant edges should not be removed ...

  7. Titanium - Wikipedia

    en.wikipedia.org/wiki/Titanium

    Market price of Titanium. All welding of titanium must be done in an inert atmosphere of argon or helium to shield it from contamination with atmospheric gases (oxygen, nitrogen, and hydrogen). [24] Contamination causes a variety of conditions, such as embrittlement, which reduce the integrity of the assembly welds and lead to joint failure. [82]

  8. Internet of things - Wikipedia

    en.wikipedia.org/wiki/Internet_of_things

    The IoT's amorphous computing nature is also a problem for security, since patches to bugs found in the core operating system often do not reach users of older and lower-price devices. [ 240 ] [ 241 ] [ 242 ] One set of researchers says that the failure of vendors to support older devices with patches and updates leaves more than 87% of active ...

  9. Gibbs free energy - Wikipedia

    en.wikipedia.org/wiki/Gibbs_free_energy

    In thermodynamics, the Gibbs free energy (or Gibbs energy as the recommended name; symbol ) is a thermodynamic potential that can be used to calculate the maximum amount of work, other than pressure–volume work, that may be performed by a thermodynamically closed system at constant temperature and pressure.