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In meteorology, an okta is a unit of measurement used to describe the amount of cloud cover at any given location such as a weather station. Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud , ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast ).
Hvat (Serbian: Хват) is a historical unit of length that was common in Croatia and Serbia analogous to fathom. The measurement system based on the hvat is called hvatski sistem [1] (literally "hvat system"). 1 hvat equals: 6 × stopa [1] (stopa is analogous to Austrian "Vienna foot" = 0.316080640 metres. [1]);
Adding and subtracting SI prefixes creates multiples and submultiples; however, as the unit is exponentiated, the quantities grow exponentially by the corresponding power of 10. For example, 1 kilometre is 10 3 (one thousand ) times the length of 1 metre, but 1 square kilometre is (10 3 ) 2 (10 6 , one million ) times the area of 1 square metre ...
A unit of measurement, or unit of measure, is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity. [1] Any other quantity of that kind can be expressed as a multiple of the unit of measurement. [2] For example, a length is a physical quantity.
[1] The test series is published by CTB/McGraw-Hill. On June 30, 2015 McGraw-Hill Education announced that Data Recognition Corporation (DRC) had agreed to acquire "key assets" of the CTB/McGraw-Hill assessment business. [2] TerraNova was created with an update in 1996 CTB to the California Achievement Tests and the California Tests of Basic ...
1/2SM indicates the prevailing visibility is 1 ⁄ 2 mi (800 m) SM = statute mile. VCTS indicates a thunderstorm (TS) in the vicinity (VC), which means from 5–10 mi (8–16 km). SN indicates snow is falling at a moderate intensity; a preceding plus or minus sign (+/-) indicates heavy or light precipitation.
The solar flux unit is a unit of spectral irradiance equal to 10 −22 W⋅m −2 ⋅Hz −1 (100 yW⋅m −2 ⋅Hz −1). The nox (nx) is a unit of illuminance equal to 1 millilux ( 1 mlx ). The nit (nt) is a unit of luminance equal to one candela per metre squared ( 1 cd⋅m −2 ).
The micrometre (SI symbol: μm) is a unit of length in the metric system equal to 10 −6 metres ( 1 / 1 000 000 m = 0. 000 001 m). To help compare different orders of magnitude , this section lists some items with lengths between 10 −6 and 10 −5 m (between 1 and 10 micrometers , or μm).