§ 61.03. Units and abbreviations.
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/us/cfr/t40/s§ 61.03·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Used in this part are abbreviations and symbols of units of measure. These are defined as follows:
(a)System International
(SI)units of measure: A = ampere g = gram Hz = hertz J = joule K = degree Kelvin kg = kilogram m = meter m 2 = square meter m 3 = cubic meter mg = milligram = 10−3gram mm = millimeter = 10−3meter Mg = megagram = 10 6gram mol = mole N = newton ng = nanogram = 10−9gram nm = nanometer = 10−9meter Pa = pascal s = second V = volt W = watt Ω = ohm µg = microgram = 10−6gram
(b)Other units of measure: °C = degree Celsius (centigrade) cfm = cubic feet per minute cc = cubic centimeter Ci = curie d = day °F = degree Fahrenheit ft 2 = square feet ft 3 = cubic feet gal = gallon in = inch in Hg = inches of mercury in H2O = inches of water l = liter lb = pound lpm = liter per minute min = minute ml = milliliter = 10−3liter mrem = millirem = 10−3 rem oz = ounces pCi = picocurie = 10−12 curie psig = pounds per square inch gage °R = degree Rankine µl = microliter = 10−6liter v/v = volume per volume yd 2 = square yards yr = year
(c)Chemical nomenclature: Be = beryllium Hg = mercury H2O = water
(d)Miscellaneous: act = actual avg = average I.D. = inside diameter M = molar N = normal O.D. = outside diameter % = percent std = standard [42 FR 51574, Sept. 29, 1977, as amended at 54 FR 51704, Dec. 15, 1989]