# Basic Constants and Conversion Factors

 C atomic weight
 12
 Ca atomic weight
 40
 Atomic weight Cl
 35.5
 Atomic weight Fe
 55.8
 atomic weight H
 1
 atomic weight K
 39.1
 Atomic weight N
 14
 Atomic weight Na
 23
 Atomic weight O
 16
 Atomic weight S
 32
 Molecular weight water
 18
 molecular weight amino acid, avg
 135
 molecular weight DNA base pair, avg
 610
 molecular weight glucose
 180
 molecular weight dry air
 28.84
 molecular weight protein, range
 5000 to 3e6
 relate m, cm, mm, microns, nm, angstroms
 1 m = 100 cm = 1000 mm = e6 microns = e9 nm = e10 angstoms
 in to cm
 1 in. = 2.54 cm
 mi to ft to km
 1 mi = 5,280 ft = 1.61 km
 typical mammalian cell, diameter
 10 microns
 kg to g to metric ton to lb
 1 kg = 1000 g = 0.001 metric ton = 2.2 lb
 lb to oz to g to kg to ton
 1 lb = 16 oz = 454 g = 0.454 kg = 5e-4 ton
 m^3 to L to cm^3 to mL
 1 m^3 = 1000 L = 1e6 cm^3 = 1e6 mL
 whole blood volume
 5L
 resting cardiac output
 5 L/min
 total lung capacity
 6.0 L
 tidal volume
 0.500 L
 breathing frequency
 12 breaths/min
 g/cm^3 to lb/ft^3 to lb/gal
 1 gm/cm^3 = 62.4 lb/ft^3 = 8.33 lb/gal
 1 g mol of an ideal gas at 0 degrees C, 760 mm Hg has what volume?
 22.4 L
 1 lb mol of an ideal gas at 32 degrees F, 14.7 psia has what volume?
 359 ft^3
 atm to mm Hg at 0 degrees C to lb/in^2 (psi)
 1 atm = 760 mm Hg at 0 degrees C = 14.7 lb/in^2
 atm to in. Hg to ft water
 1 atm = 29.92 in. Hg = 34 ft water
 atm = bar = kPa = dynes/cm^2
 1 atm = 1.013 bar = 101.3 kPa = 1.013e6 dynes/cm^2
 ft^3 = gal = L
 1 ft^3 = 7.48 gal = 28.3 L
 Pa = N/m^2
 1 Pa = 1 N/m^2
 systemic blood pressure
 120/80 mmhg
 delta C = delta F
 delta 1.0 degree C = delta 1.8 degrees F
 C to F
 F = 1.8(C) + 32
 F to R
 Rankine = F + 460
 C to K
 K = C + 273
 Room temp (C and K)
 25 degrees C (298K)
 Body core temperature
 37 degrees C (310K)
 lbf = lbm*ft/s^2 = N = kg*m/s^2 = dynes
 1 lbf = 32.174 lbm*ft/s^2 = 4.448N = 4.448 kg*m/s^2 = 4.448e5 dynes
 N = kg*m/s^2
 1 N = 1 kg*m/s^2
 dyne = g*cm/s^2
 1 dyne = 1 g*cm/s^2
 Nm = kg*m^2/s^2 = lbf*ft
 1 Nm = 1 kg*m^2/s^2 = 0.738 lbf*ft
 Btu = cal = ft*lbf = J
 1 Btu = 252 cal = 778 ft*lbf = 1055 J
 J = dyne*cm
 1 J = 1e7 dyne*cm
 Composition of air
 79% N2, 21% O2
 Standard temp and press
 0 degree C1 atm
 Molar volume of an ideal gas at STP
 22.4 L/mol = 359 ft^3/lbm*mole
 kW = J/s = hp = cal/s
 1 kW = 1000 J/s = 1.34 hp = 239 cal/s
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