Basic Constants and Conversion Factors

C atomic weight
12.0
Ca atomic weight
40.0
Atomic weight Cl
35.5
Atomic weight Fe
55.8
atomic weight H
1.0
atomic weight K
39.1
Atomic weight N
14.0
Atomic weight Na
23.0
Atomic weight O
16.0
Atomic weight S
32.0
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 C
1 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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