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ampere
a measure of electrical current
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Avagadro's number (or constant)
the number of elementary entities per mole of substance and it has the value 6.022×1023 per mole
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Avoirdupois
- Weight scale based on a pound = 16 oz.
- Opposite is Troy
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Barrel
- liquid measure that equals
- 31.5 gallons (US)
- 1/2 a hogshead
- 1/4 a butt
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Beaufort
Scale that measures wind speed & hurricanes
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Bit
Smallest unit of information used in computer engineering; equal to 1/8 of a byte
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Bolt
A large roll of cloth
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Bucket
- Dry measure that equals:
- 2 pecks
- or 16 quarts
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Bushel
- Dry measure that equals:
- 2 buckets
- or 4 pecks
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Butt
- Liquid measure that equals:
- 2 hogsheads or
- 4 barrels or
- 126 gallons US
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Byte
A unit of information used in computer engineering; equal to 8 bits.
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Caliber
diameter of a bullet or shell
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Carat
jewler's measure of weight (diamonds) or purity (gold)
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Celsius
Temp measurement, also called centegrade, where freezing = 0 and boiling = 100 degrees.
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Cord
A quantity of logs measuring 128 cubic feet
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Cubit
An ancient unit of length; = to about 18 inches
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Curie
A unit of radioactivity
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Decibel
A logarithmic measure used for measuring sound.
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Elite
Typewriter type that runs 12 characters to the inch.
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Fahrenheit
Temp measurement, also called centegrade, where freezing = 32 and boiling = 212 degrees.
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Fathom
A measurement of water depth = to 6 feet.
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Flagon
A traditional unit of liquid measure = to one gallon.
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Furlong
Unit of distance = to 220 yards or 1/8th mile.
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Gill
Liquid measure; equals 4 ounces.
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Hectare
A unit of land measure = to 2.47 acres.
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Hertz
A measure of frequency.
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Hogshead
- liquid measure that equals
- 63 gallons (US) or
- 1/2 a butt
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Joule
A quantity of energy
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Kelvin
Temperature scale where 0 Kelvin is absolute zero, the point at which all motion ceases; H2O melts at 273 K (= 0° C = 32° F); H2O boils at 373 K (= 100° C = 212° F). Degrees = C + 273.
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Knot
Measure of speed on the sea.
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League
A unit of nautical distance = to 3 miles or 4.8 km.
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Ohm
measure of electrical resistance.
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Peck
- Dry measure that equals:
- 8 quarts
- or 4 1/4 bushel
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pH
A scale that measures whether a substance is an acid or a base. It goes from 0-14: 0 is an acid, 14 is a base and 7 is neutral.
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Pica
A a typographic unit of measure equal to 1/6th of an inch
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Quintal
A unit of weight equal to 100 kg.
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Richter
A logarithmic scale that mesaures tremors and earthquakes.
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rod
16.5 feet or 5.5 yards
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Saffir-Simpson
a classification used for some Western Hemisphere tropical cyclones (hurricanes) that exceed the intensities of tropical depressions and tropical storms
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Score
A traditional unit of quantity equal to 20.
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Stone
A unit of weight equal to 14 pounds or 6.4 kg.
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Troy
- Weight scale based on a pound = 16 oz.
- Opposite is Avoirdupois
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Volt
A unit of electrical output.
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Watt
A measurement of power.
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640 acres =
one square mile
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Explain hierarchy of dry and liquid measure.
- Gallons are always divided into 4 quarts, which are further divided into 2 pints each. For larger volumes of dry commodities, there are 2 gallons in a peck and 4 pecks in a bushel.
- Larger volumes of liquids were carried in barrels, hogsheads, or other containers whose size in gallons tended to vary with the commodity.
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ton - long and short
- 2000 pounds US (short ton)
- 2240 pounds UK (long ton)
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