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Basic Sclence ; Physics 15 Units and Measurements, , SI Prefixes : The magnitudes of physical quantities changed over broad range, As an engineer we should be able to convert the units of same quantity in different systerns and forms, The CGPM recommended standard prefixes of multiples and sub multiples of units are as shawn below, The entire SI sytem consists of units which are multiples and submultiples of MKS units in steps of 10° of 10°", Table 14: Prefixes for St units, Value Indicated, 10”, 10”, 10", 10°, 10”, 10°, 108, 103, 10?, , Symbol, , |, , , , , , , , , , , , , , , , => re Ban ven <, , , , , Qa, eo, , , , , , , , 107, 107?, 103, , ne 28 8 S23 = So, , , , yocto, , The bold type prefixes (giga, mega, kilo, centi, milli, micro, nano, pico) shown above are used more oftenly., For example, how to convert, , 1 kg = 1x10’gm, 1MW = 1x10°W, Io = 1x10’m, 1pm = 1x10%m, InF = 1x10°F, , Se, , ul, , Table 1.5, , , , , , , a ae wie ‘of, , 4. Force dyne newton case force newton Ndyn (gm. ane) N (kg.m/s’) kg m/s, , pound persqvare food | _Nim?__|