actual measurement
51AFUE — an abbreviation for annual fuel utilization efficiency, a measure of the efficiency of a gas furnace. The rating is designed to represent the percentage of the fuel energy actually delivered as heat energy, averaged over the course of a… …
52blink — a unit of time equal to 10 5 day or exactly 0.864 second. This unit is also called the metric second; in most metric time proposals, the day is divided into 10 hours, each hour into 100 minutes (called beats in Internet time : see beat above) …
53bottle — (btl) a unit of volume. Like actual bottles, this unit varies according to the nature of the contents. For a long time in the U.S., a bottle of milk was 1 quart (1/4 gallon or 946.36 milliliters), a bottle of whiskey was 1 fifth (1/5 gallon or …
54bril — a unit used to express the brilliance or subjective brightness of a source of light. The scale used is logarithmic: an increase of 1 bril means doubling the luminance (and thus the actual amount of light energy) emitted by the source. A… …
55business day — a unit of time equal to one day3 duringwhich a business is open. Phrases such as 8 10 business days are common;they refer to a period of time containing that number of business days plushowever many days the business is not open during the… …
56can sizes — Food cans are identified by their nominal dimensions, diameter × height. (The nominal dimensions are somewhat larger than the actual dimensions, as is the case for lumber and some other products.) In the metric world the dimensions are 2 …
57candela — (cd) the SI base unit for measuring the intensity of light. Candela is the Latin word for candle. The unit has a long and complicated history. Originally, it represented the intensity of an actual candle, assumed to be burning whale tallow… …
58carb — 1. an informal unit used in the treatment of diabetes, equal to 15 grams of carbohydrates. This unit is known under various names, including carbo, carb unit, choice, or exchange. The significance of 15 grams is that in a very rough way that… …
59cunit — a measure of wood volume used in forestry. One cunit (pronounced cue nit) is a volume of timber containing 100 cubic feet (2.8317 cubic meters) of actual wood (excluding bark and air between the logs). The unit is used mostly for wood intended …
60eclipse year — a unit of time used in astronomy in the prediction of eclipses. The plane of the moon s orbit around the earth and the plane of the earth s orbit around the sun intersect in a line called the line of nodes. Eclipses of the sun or moon can only …
