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  1. Cellulose acetate (4564 bytes)
    1: ...the acetate [[salt]] of [[cellulose]]. Cellulose acetate is used as a [[film]] base in [[photography]...
    4: ...e]] film was introduced in the [[1950s]] as a replacement for the unstable and inflammable [[cellulose...
    6: ...oxygen]] to an unusable state, releasing [[acetic acid]]. This is known as "[[vinegar]] syndrome."
    8: ... [[Polyester]] film stock has become more commonplace.
    10: ...ibers ([[nylon]] and [[polyester]]) and have displaced regenerated pulp fibers.
  2. Hammer (2263 bytes)
    3: ...head. The head is composed of a flat striking surface on one end, and a ''peen'' on the other. The pee...
    7: ...d. In the [[Middle Ages]], the [[war hammer]] was developed when edged weapons could no longer easily ...
    9: The hammer takes its place in modern weapons in the form of the [[firearm]] hammer o...
    11: The use of a hammer to fix broken machinery is jokingly referred to as ''percussive mai...
    13: Well-known forms include:
  3. Air (872 bytes)
    2: ...ter [[breathing gas]] and to inflate [[buoyancy]] devices. Compressed air is also used as the means of...
    8: {{Wiktionary}}
    9: ...udiovisual production means to [[broadcasting|broadcast]] it.
    10: ...a [[baroque]] [[clavier]] work composed by [[J.S.Bach]].
    17: [[Category:HVAC]]
  4. Study (876 bytes)
    1: {{wiktionary}}
    3: * To '''study''' means to acquire [[knowledge]], often by memorization or read...
    5: ...udies''''' may refer to a field of research or academics.
    6: ...[sketch]] or drawing made in order to practise or demonstrate a subject or technique; see [[drawing]].
    7: ...udy''' is a musical form also used to practise or demonstrate a subject or technique; see [[study (mus...
  5. Fact (2548 bytes)
    1: {{Wiktionary}}
    2: [[Fact]] is the following:
    3: ...n encyclopedia. It is important to note how the modernization of the term pertains to the terms' own v...
    4: *In [[philosophy]], a fact is either a true [[proposition]] or something (a...
    5: ...of how the universe works. Facts do not prove a model is correct. One observation of any phenomenon d...
  6. Temperature (22519 bytes)
    1: ...[[physics|physical]] property of a system which underlies the common notions of "hot" and "cold"; the ...
    3: ==General description==
    8: ... heat is added the temperature rises, similarly a decrease in temperature corresponds to a loss of hea...
    10: ... [[extrinsic property|extrinsic properties]], and depend on the amount of material in the system.
    15: ...ace. One application of this effect is the [[incandescent light bulb]], in which a [[tungsten]] filame...

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