The beard-second is a unit of length created as teaching exercise inspired by the light year, but for nuclear physics instead of astronomy. The beard-second is defined as the length an average beard grows in a second, or about 5 nanometers.
The beard-second is less popular than the Ångström (10 m). In physics it is also common to use the SI units, usually with the nano prefix; 1 nm = 10 m.
Read article at Wikipedia
Beard-second
We can tell you that Beard-second is a
If you know more about Beard-second, you can add more facts here »
Similar topics in Freebase
-
Meter
The metre (meter in the US), symbol m, is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the North Pole (at sea level), its definition has been periodically refined to reflect growing... -
Millimeter
The millimetre (American spelling: millimeter; SI unit symbol mm; informal abbreviation: mil) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. It is equal to 1,000 micrometres and 1,000,000 nanometres. There are 25.4 mm in one inch.... -
Light-year
A light-year, also light year or lightyear (symbol: ly) is a unit of length, equal to just under 10 trillion kilometres (or about 6 trillion miles). As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year. The light... -
Hectometre
A hectometre (American spelling: hectometer, symbol hm) is a somewhat uncommonly used unit of length in the metric system, equal to one hundred metres. It derives from the Greek word "ekato", meaning "hundred". A regulation football or soccer field is approximately 1 hectometre in length. -
Nanometre
A nanometre (American spelling: nanometer; symbol nm) is a unit of length in the metric system, equal to one billionth of a metre. The name combines the SI prefix nano- (from the Ancient Greek νάνος, nanos, "dwarf") with the parent unit name metre (from Greek μέτρον, metrοn, "unit of measurement").... -
Toise
A toise (symbol: T) is a unit of measure for length, area and volume originating in pre-revolutionary France. In North America, it was used in colonial French establishments in early New France, French Louisiana (La Louisiane), and Quebec. The Portuguese toise (in Portuguese: toesa) was used in... -
Spat
The spat (symbol S), from the Latin Spatium ("Space") is an obsolete unit of distance used in astronomy. It is equal to one billion kilometres (1 Tm or 10 m). It is about 1.057×10 light-years or 3.240×10 parsecs. -
Cham am
The cham am is a unit of length, used during 18th – 20th century in Cambodia. It is equivalent to 12 Thneap or 25 cm. -
Bohr radius
The Bohr radius is a physical constant, approximately equal to the most probable distance between the proton and electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. The precise definition of the Bohr radius is: where: Or, in... -
Decimetre
A decimetre (American spelling: decimeter, symbol dm) is a unit of length in the metric system, equal to one tenth of a metre, the SI base unit of length. In simple words there are 10 cm in a decimetre. It can be written in scientific notations as 100×10 m (engineering notation) or 1 E-1 m ...