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- Lubricant (1488 bytes)
1: ...duced between two moving surfaces to reduce the [[friction]] and wear between them. Worldwide, more t...
3: ...mes used as base oils. Additives deliver reduced friction and wear, increased viscosity, resistance t...
5: ... cushion and others. An alternative way to reduce friction and wear is to use bearings such as [[ball ... - Roller hockey (4297 bytes)
1: '''Roller hockey''' is a game derived from and very similar to [[ice hockey]], but using [...
13: ...y uses a six ounce puck that glides on plastic or teflon coated rollers and is most often played on a plas...
23: ...e hockey, with two goals centered 12 feet (3.7 m) from the far ends of each court, four faceoff circle...
41: ... professional North American league, which played from [[1993]] to [[1999]].
45: ... is a professional men's league with teams mainly from the Philadelphia area, and surrounding states. - List of chemists (10401 bytes)
15: *[[Antoine Baum]], (1728-1804), French chemist
16: *[[Claude Louis Berthollet]], (1748-1822), French chemist
21: *[[Henri Braconnot]] (1780-1855), French chemist and pharmacist
31: ...Skłodowska-Curie]], (1867-1934), Polish-born French radiation physicist
44: *[[Jean Baptiste Dumas]], (1800-1884), French chemist - Capacitor (29664 bytes)
9: [[Image:Dielectric.png|frame|The electrons in the molecules shift toward th...
14: :<math>C = \frac{Q}{V}</math>
32: :<math>i(t) = C \frac{dv(t)}{dt}</math>
34: The [[impedance]] in [[frequency domain]] can be written as
36: :<math>Z = \frac{1}{j \omega C} = - j X_C </math> - Ronald Reagan (52721 bytes)
23: ...-grandfathers had immigrated to the United States from [[Ballyporeen]], [[Ireland]] in the [[1860s]]....
25: In [[1920]], after years of moving from town to town, the family settled in [[Dixon, Il...
29: ...the next seven years, reportedly saving 77 people from drowning. Reagan would later joke that none of ...
31: ...games, getting only the bare outlines of the game from a ticker and relying on his imagination and sto...
35: ...] in the film ''[[Knute Rockne, All American]]'', from which he acquired the nickname ''the Gipper'', ... - Computer mouse (29399 bytes)
1: ...encoding disks include light holes.<br>'''4:''' Infrared LEDs shine through the disks.<br>
9: [[Image:firstmouseunderside.jpg|frame|The first computer mouse held by inventor [[Do...
11: ...with spring by ''Opocentsky'', 10/76, [http://www.freepatentsonline.com/3987685.html 3987685].]]
26: ... sensor will process 1512 frames per second: each frame is a rectangular array of 18*18 [[pixels]], an...
28: ...s in optical mouse technology comes in large part from competitive [[first-person shooter|FPS]] gamers... - Fluorine (8588 bytes)
34: '''Fluorine''' (from L. ''fluere'', meaning "to flow"), is the [[che...
45: ... such as [[Teflon]], and in [[halon]]s such as [[Freon]]. Other uses:
49: ...luorine is used in the production of [[uranium]] (from the hexafluoride) and in more than 100 differen...
50: ...ed extensively in [[air conditioning]] and in [[refrigeration]]. [[Chlorofluorocarbon]]s have been ban...
62: ...s due to its extreme reactivity - it is separated from its compounds only with difficulty and then it ... - Screw (22059 bytes)
4: [[Image:screws.jpg|frame|Screws come in a variety of shapes and sizes f...
17: ...screw when driving it in. It also stops the screw from passing right through the material being fasten...
44: ...ed. Some types of plastic such as [[nylon]] or [[Teflon]] can be threaded and used for fastening requirin...
49: [[Image:Screw and trough.gif|frame|right|Rotating screw and fixed trough]]
50: ...ch, thread shape or cross section, coefficient of friction (static and dynamic), and holding power of ...
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