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Atomic weight of Carbon (C)
12.0
Atomic weight of Calcium (Ca)
40.0
Atomic weight of Chlorine (Cl)
35.5
Atomic weight of Iron (Fe)
55.8
Atomic weight of Sodium (Na)
23.0
Atomic weight of Hydrogen (H)
1.00
Atomic weight of Oxygen (O)
16.0
Atomic weight of Potassium (K)
39.1
Atomic weight of Sulfur (S)
32.0
Atomic weight of Nitrogen (N)
14.0
Atomic weight of Phosphorus (P)
31.0
Molecular weight of Water
18
Molecular weight of Glucose
180
Average molecular weight of Amino acid
135
Average molecular weight of DNA base pair
610
Molecular weight of Dry air
28.84
Typical mammalian cell diameter
10 µm
Length: 1 meter
100 cm = 1000 mm = 10^6 microns = 10^9 nanometers
Length: 1 mile
5280 ft = 1.61 kilometers
Length: 1 yard
3ft = 36 in = 91.44 cm
Mass: 1 kg
1000g = 0.001 metric ton = 2.2 lb
Mass: 1 lb
16 oz = 454 g = 0.454 kg = 5 x10^-4 ton
Desnity: 1 g/cm³
62.4 lb /ft3 = 8.33 lb/gal
Density: 1 g-mole of an ideal gas at 0ºC
760 Torr (mm Hg) = 22.4 L
Density: 1 lb mol of ideal gas at 32°F
14.7 psia = 359 ft^3
Pressure: 1 atm at 0 degrees celsius
760 torr = 14.7 lb/in^2 (psi)
Pressure: 1 atm
29.92 in. Hg = 34 ft H20
Pressure: 1 atm
1.013 bar = 101.3 kPa = 1.013 x 10^6 dynes/cm^2
Pressure: 1 atm
1 Pa = 1 N/m^2
Systemic Blood Pressure
120/80 mmHg
Pa
P atm + Pg
Temperature: 1.0 A°C
1.8 A°F
Temperature: Celsius to Fahrenheit
°F = 1.8 (°C) +32
Temperature: Rankine
Fahrenheit + 460
Temperature: Kelvin
Celsius + 273
Room Temperature
25 C, 298 K
Body Core Temperature
37° C (310K)
Force: 1lbf
32.174 lbm-ft/s^2 = 4.448 N = 4.448 kg m/s^2 = 4.448 x 10^5 dynes
Force: 1N
1 kg m/s^2
Force: 1 dyne
1 g cm/s^2
Standard Temperature and Pressure
0 degrees Celsius and 1 atm
Molar Volume fo Ideal Gas at STP
22.4 L/mol = 359 ft3³/bm-mole at 273 K
Energy/Work: 1 Btu
252 cal = 1055 J = 778 ft-lbr (foot-pound force)
Energy: 1 Joule
10^7 dyne-cm
Energy: 1 cal
4.184 J
Energy: 1 food cal
1000 cal
Power: 1 kW
1000 J/s = 1.34 hp = 239 cal/s