CONSTANTS

g of Earth (in SI)

9.8066 m/s²

g of Earth (in English)

32.174 ft/s²

g of Moon (in SI)

1.67 m/s²

g of Moon (in English)

5.47 ft/s²

Density of Water (in SI)

1000 kg/m³

Density of Water (in English)

62.4 lbm/ft³

Specific Weight of Water (in SI)

9.81 kN/m³

Specific Weight of Water (in English)

62.4 lbf/ft³

Density of Air (in SI)

1.2 kg/m³

Density of Air (in English)

0.75 lbm/ft³

R of Air (in SI)

0.20708 kJ/kg-K

R of Air (in English)

53.34 lbf-ft/lbm-R

R bar (in SI)

8.3143 kJ/kg-K

R bar (in English)

1545 ft-lbf/lbm-R

R bar (in atm-L/mol-K)

0.0821 atm-L/mol-K

Cp of Air (in SI)

1 kJ/kg-K

Cp of Air (in English)

0.24 BTU/lbm-R

Cv of Air (in SI)

0.7186 kJ/kg-K

Cv of Air (in English)

0.1715 BTU/lbm-R

Cp of Water (in SI)

4.187 kJ/kg-K

Cp of Water (in English)

1 BTU/lbm-R

Cp of Water (in cal/g-C)

1 cal/g-C

k of Air (cold)

1.4

k of Air (hot)

1.3

k of Helium

1.667

k of CO2

1.287

k of Nitrogen

1.399

Molecular Weight of Oxygen (O2)

32

Molecular Weight of Nitrogen (N2)

28

Molecular Weight of CO2

44

Molecular Weight of Ammonia

17

Molecular Weight of Helium

4

Molecular Weight of Hydrogen

1

Molecular Weight of Carbon

12

Molecular Weight of Sulfur

32

Molecular Weight of Air

29

c (speed of light)

3 x 10⁸ m/s

Latent Heat of Fusion of Water (in SI)

334 kJ/kg

Laten Heat of Fusion of Water (in English)

144 BTU/lbm

Latent Heat of Vaporization of Water (in SI)

2257 kJ/kg

Latent Heat of Vaporization of Water (in English)

970 BTU/lbm

Cp of Ice

0.5 Cp of Water

Specific Gravity of Mercury

13.55

Specific Gravity of Seawater

1.03

Young's Modulus (Modulus of Elasticity) (E)

2.1 x10⁶ kPa

Avogadro's Number (Na)

6.02 x10²³ /mol

R of Vapor (in SI)

0.4615 kJ/kg

R of Vapor (in English)

0.1102 BTU/lbm-R

Cp of Milk (in SI)

3.9 kJ/kg

Cp of Milk (in English)

0.93 BTU/lbm-R

Mass of Earth

6 x10²⁴ kg

Mass of Moon

7.36 x10²² kg

Mass of Sun

1.99 x 10³⁰ kg

Mass of electron at rest

9.109 x10^-31 kg

Mass of proton at rest

1.673 x10^-27 kg

Mass of neutron at rest

1.675 x10^-27 kg

atomic mass unit

1.6606 x10^-27 kg

charge of electron

-1.6022 x10^-19 c

charge of proton

+1.6021 x10^-19 c

Boltzmann Constant

1.3807 x10^-23 J/K

Stefan-Boltzmann Constant

5.67 x10^-8 W/m²-K⁴

Planck's Constant

6.6256 x10^-34 J-s

Faraday Constant

96485 c/mol

Volume of Ideal Gas at STP

22.4207 m³/kg-mol

Mechanical Equivalent of Heat

4.186 J/cal

Speed of Sound

331 m/s