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1m
100cm = 1,000mm =1,000,000µm (10^6) = 10^9 nanometers = 10^10 angstroms
1 yard
3ft = 36in = 91.44 cm
1mi
5,280 ft = 1.61 kilometers
mammalian cell diameter
10 microns
1kg
1000g = .001 metric ton = 2.2lbs
1lbm in oz, g, ton
16 oz = 454 g = .454kg = 5×10^-4 ton
1m³
1000L = 10^6 mL = 10^6 cm³
1ft³ in gal and L
7.48gal = 28.3 L
Whole blood volume
5L
Resting Cardiac Output
5L/min
Total Lung Capacity
6L
Tidal Volume
.5 L
Breathing Frequency
12 breaths/min
1g/cm³ in lbm/ft³ and lbm/gal
62.4lbm/ft³ = 8.33lbm/gal
1 g mol of ideal gas at 0oC
760mm Hg = 22.4L
1 lb mol of ideal gas @ 32oF
14.7 psia = 359ft3
1 atm in torr and psi
760mm Hg @ 0oC = 14.7 lbf/in2
1 atm in in Hg and ft H2O
29.92 in. Hg = 34ft H2O
1 atm in bar, kPa, Dynes/cm2
1.013 bar = 101.3kPa = 1.013 × 106 Dynes/cm2
1 Pa
1 N/m2
Systematic blood pressure
120/80 mm Hg
1oC = 1.8oF
F = 1.8C + 32
Rankine equation
R = F + 460
Kelvin equation
K= C + 273
Room temp
25oC (298k)
Core Body temp
37oC (310k)
1lbf in lbmft/s2, N, dynes
32.174 lbm ft/s2=4.448N (aka. kg m/s2) = 4.448 × 105 dynes
1 dyne
1 g cm/s2
Dry air volume/mole percentage
N = 79%, O = 21%
Dry air weight %
N= 76%, O = 24%
STP
0oC and 1 atm
Molar volume of ideal gas at STP
22.4 L/mol = 359 ft3/lbm-mole at 273 K
Energy/work (1 btu)
252 cal = 778 ft-lbf (foot-pound force)= 1055 Joules
1J
107 dyne cm
1 cal in joules
4.184 Joules
1 food cal
1000 cal
POWER (1kW)
1000J/s = 1.34 hp = 239cal/s
C
12
O
16
N
14
Ca
40.0
Cl
35.5
Fe
55.8
H
1.00
Na
23.0
S
32
P
31
K
39.1
molecular weight of dry air
28.84
amino acid avg weight
135
DNA base pair avg weight
610
protein weight
5000 to 3×106