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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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thermal radiation Phys.
Also call black body radiation. See black body radiation.

Thermit process Min. Ext., Chrm.
See Goldschmidt process.

thermochemistry Chem.
The branch of physical chemistry that studies the heats (enthalpy) of chemical reactions and heats of formation of chemical compounds.

tincture Chem., Med.
A solution with alcohol as the solvent. For example, tincture of iodine is a solution with iodine dissolves in ethanol.

titration Chem.
A technique of volumetric analysis to determine the concentration of a solution sample. A volume of a reagent (say reagent A) of known concentration is added to a known volume of another reagent (say reagent B) slowly and in small amount from a burrette until an end point is reached. The volume of reagent A just before the end point is reached is noted. The concentration of reagent B can then be determined if the reaction between A and B is also known.

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