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Index (C)

CA - CC

CD - CF

CG - CJ

CK - CN

COA - CON

COO - CR

CS - CV

CW - CZ

Moment of truth
The Voyager I spacecraft is the most distant man-made object in the universe. It was launched in 1977 and as in 2002, it was more than 8 billions miles from the Earth.


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curie Metro.
A non-SI unit that is used in particle physics to measure the activity (number of disintegration per second) of a radioactive source. It has a symbol Ci, and named after Marie Curie (1867-1934). 1 Ci = 3.7 x 1010 disintegration per second, which is equivalent to the activity of 1 g of radium. See also becquerel.

Curie temperature Phys.
For a ferromagnetic material, the critical temperature above which the material become paramagnetic, dur to thermal agitation that causes the electron spins to mis-align. For instance, the Curie temperature for iron is 1043 K. Also applied to the temperature at which the spontaneous polarization dissappear in a ferroelectric solid.

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