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- Morse code (33777 bytes)
2: ...king it appropriate for sending automated digital data in voice channels.
6: # longer mark, dash or 'dah' (-)
7: # intra-character gap (between the dots and dashes within a character)
11: ...e length of the Morse characters made it hard to adapt to automated communication, so it was largely r...
13: ...rmany and eventually adopted as the worldwide standard as "International Morse". Morse's original code... - Lightning (33113 bytes)
14: Although some others ([[Dalibard]] and [[De Lors]]) had conducted similar ex...
39: ...ve lightning carries a current of 30 [[ampere|kiloamperes]], transfers a charge of 5 [[coulomb]]s, has a p...
46: ...s unknown at the time standards were set, and the dangers unappreciated until the destruction of a gli...
50: ...f positive lightning carries a current of 300 kiloamperes, transfers a charge of up to 300 [[coulomb]]s, h...
69: ... storm and will strike without warning on a sunny day. They are signs of an approaching storm. - Capacitor (29664 bytes)
7: ...s stored at the surface of the plates, at the boundary with the dielectric. Because each plate stores...
34: The [[impedance]] in [[frequency domain]] can be written as
38: Applying the [[Laplace transform]], the impedance becomes:
70: ...rief summary to that article ? --[[User:DavidCary|DavidCary]] 22:46, 1 Jun 2005 (UTC) -->
80: ...pacitance and little DC leakage, and very low impedance at low frequencies. However, unlike aluminum e... - Electricity (13894 bytes)
1: .... Electricity gives rise to one of the four [[fundamental force]]s of nature, and is a conserved prop...
8: ..., dated to about [[250 BCE]] and called the [[Baghdad Battery]], resembles an electrochemical cell and...
10: ...modern Latin word ''electricus'' from ''ηλεκτρον'' (''elek...
12: ...and theories through the famous, though extremely dangerous, [[experiment]] of flying a [[Kite flying|...
16: ...Ampere, and Ohm is honored by society, in that fundamental units of electrical measurement are named a... - Magnet (13875 bytes)
12: ... expected that all matter would be magnetic. Everyday experience shows that this is not the case.
56: A standard naming system for the poles of magnets is impor...
74: ...on this technology, but the vast majority do. Standard microphones are based upon the same concept, bu...
116: ...nit: [[tesla (unit)|tesla]] [[metre|meter]] per [[ampere]]) - Leyden jar (3953 bytes)
7: ...stored at the surface of the elements, at the boundary with the dielectric.
16: ...ation has been abandoned, Maxwell's correction to Ampere's law remains valid (a changing electric field pr...
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