Phụ lục 2 - giáo trình MathCad 1.1 2007/11/12 03:56:01.531 US/Central 2007/11/18 04:55:12.542 US/Central Huỳnh Vương Thu Minh minhhuynh@vocw.edu.vn Huỳnh Vương Thu Minh minhhuynh@vocw.edu.vn phụ lục PHỤ LỤC 2 HỆ ĐƠN VỊ SI Base Units M (meter), lengthA (ampere), currentMole or mol, substance Kg (kilogram), massK (kenvin), temperature s (second), timecd (candela), luminosity Angular Measure Rad = 1 deg = π180rad size 12{ { {π} over {"180"} } ital "rad"} {} Sr = 1.sr Length cm = 0.01.mft = 0.3048.mmi = 5280.ft km = 1000.min = 2.54.cm mm = 0.001.myd = 3.ft Mass gm = 0.001.kgmg = 0.001.gmoz = 1b16 size 12{ { {1b} over {"16"} } } {} tonne = 1000.kgton = 2000.lb lb = 453.59237.gmslug = 32.174.lb Time min = 60.syr = 365.2422.day hr = 3600.s day = 24.hr Area, Volume hectare = 10000.m2mL = 0.001.L acre = 4840.yd2fl_oz = 29.57353.cm3 L = 0.001.m3gal = 128.fl_oz Velocity, Acceleration mph = mihr size 12{ { { ital "mi"} over { ital "hr"} } } {} kph = kmhr size 12{ { { ital "km"} over { ital "hr"} } } {} G = 9.80665. ms2 size 12{ { {m} over {s rSup { size 8{2} } } } } {} Force, Energy, Power N = kg.ms2 size 12{ ital "kg" "." { {m} over {s rSup { size 8{2} } } } } {}kgf = g.kgcal = 4.1868.JW = Js size 12{ { {J} over {s} } } {} dyne = 10−5.N size 12{"10" rSup { size 8{ - 5} } "." N} {}J = N.mkcal = 1000.calkW = 1000.W lbf = g.lberg = 10−7.J size 12{"10" rSup { size 8{ - 7} } "." J} {}BTU = 1.05506.103.J size 12{1 "." "05506" "." "10" rSup { size 8{3} } "." J} {}hp = 550. ft.lbfs size 12{ { { ital "ft" "." ital "lbf"} over {s} } } {} Pressure, Viscosity Pa = Nm2 size 12{ { {N} over {m rSup { size 8{2} } } } } {}in_Hg = 3.37686.103.Papoise = 0.1.Pa.s psi = lbfin2 size 12{ { { ital "lbf"} over { ital "in" rSup { size 8{2} } } } } {}torr = 1.33322.102.Pa atm = 1.01325.105.Pastokes = 10-4. ms size 12{ { {m} over {s} } } {} Temperature R = 0.556.K