Calorie-
A unit of energy defined as that amount of energy required to
raise the temperature of one gram of water by one degree Celsius (the
gram-calorie or small calorie), equal to 4.1855 joules (the kilogram calorie or
large calorie (Kcal, kg-cal, or Cal) is 1000 times as large as a calorie).
Candela- A unit of
luminous intensity expressed in lumen per steradian (lm sr1); the candela was
first defined as 1/60 the luminous intensity, in the perpendicular direction, of
a 1 cm2 blackbody radiator at the freezing temperature of platinum (about 2042
K) and a pressure of 1 atmosphere;it is now defined as the luminous intensity of
a light source producing single-frequency light at a frequency of 540 terahertz
with a power of 1/683 watt per steradian (it is the standard unit of measure for
luminous intensity adopted by the International System of Units (SI), in some
texts, it is referred to as the international standard
candle).
Candle-
The original unit of luminous intensity, defined as the luminous
intensity of a candle of particular construction (the candle was eventually
replaced by the international candle, the new candle in 1939, and finally the
candela in 1948).
Celsius- A temperature scale based on the freezing, 0°, and boiling points of water, 100°, at 1000 mb pressure.
Centimeter- A metric unit of measurement for length; 1 cm = 0.4 inches;
2.54 cm = 1 inch.
Coulomb-
The amount of electric charge carried by a current of one
ampere flowing for one second (the SI unit of electric charge, named after
Charles-Augustin de Coulomb).
Curie- A unit of radioactivity,
defined as exactly 3.7 × 1010 disintegrations per second, which is approximately
the activity of 1 gram of radium (the Becquerel has replaced the Ci in the SI
system).
