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  2. Class ring - Wikipedia

    en.wikipedia.org/wiki/Class_ring

    A class ring in a ring case. This ring is made of white ultrium and contains a synthetic sapphire gemstone. [1] Damavand College class ring of 1975. In the United States and Canada, a class ring (also known as a graduation, graduate, senior, or grad ring) is a ring worn by students and alumni to commemorate their final academic year and/or graduation, generally for a high school, college, or ...

  3. Chemical thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Chemical_thermodynamics

    Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various thermodynamic properties, but also the application of mathematical methods to the ...

  4. Thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Thermodynamics

    Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation.

  5. Siladium - Wikipedia

    en.wikipedia.org/wiki/Siladium

    Siladium is a trademark for a stainless steel alloy used in jewelry, particularly in high school and college class rings. [1]The trademark was registered in 1973 to John Roberts, Inc., maker of the Artcarved brand of class rings.

  6. Laws of thermodynamics - Wikipedia

    en.wikipedia.org/wiki/Laws_of_thermodynamics

    The laws of thermodynamics are the result of progress made in this field over the nineteenth and early twentieth centuries. The first established thermodynamic principle, which eventually became the second law of thermodynamics, was formulated by Sadi Carnot in 1824 in his book Reflections on the Motive Power of Fire.

  7. Terryberry - Wikipedia

    en.wikipedia.org/wiki/Terryberry

    Terryberry is a private, U.S. based company that provides employee recognition and award programs. Founded in 1918 by H. R. Terryberry in Grand Rapids, Michigan, Terryberry's original business focus was producing High School class rings in the Midwestern United States.

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