Catálogo General de Material para Laboratorio

15 KNOWLEDGE Quantities and units (continued) Quantity Legal units Units no longer approved Conversion factors/ Relationships Comments Name Symbol Name Symbol volume cubic meter liter m 3 l m 3 of timber stacked m 3 standard m 3 cbm cdm Fm Rm Nm 1 m 3 1 l 1 Fm 1 Rm 1 Nm = 1 m · 1 m · 1 m = 10 -3 m 3 = 1 dm = 1 m 3 = 1 m 3 = 1 m 3 SI unit volume flow, volume flux m 3 /s l/s 1 m 3 /s 1 l/s = 10 3 l/s = 10 6 mm 3 /s SI unit quantity of heat joule J calory cal 1 J 1 cal = 1 N · m = 1 W · s = 4,187 J SI unit resistance, electrical specific ohm Ω Ω ·mm 2 /m Internat. Ohm Ω int 1 Ω 1 Ω int = 1 V/A = 1 W/A 2 = 1 kg · m 2 /s 3 · A 2 = 1,00079 Ω SI unit angle, plane spatial radian perigon degree minute second centesimal degree Steradiant rad ° ‘ " gon sr 1 rad 1 Vollw. 1° 1’ 1" 1 gon 1 sr = 1 m/1 m = 57° 17’ 45" = 2 π rad = 360° = π 0 180 rad = 1,7453 · 10 -2 rad = 1° 60 = 2,9089 · 10 -4 rad = 1’ 60 = 4,8481 · 10 -6 rad = 1 π 1 200 rad = 1 m 2 /1 m 2 supplementary SI unit (plane angle = ratio of the arc of a circle to the radius of a circle) supplementary SI unit (spatial angle = ratio of an area cut out from a sphere to the square of the radius of the sphere) time second minute hour day s min h d sec. min. 1 min 1 h 1 d = 60 s = 60 min = 24 h SI basic unit