10. Astronomical Data
Body Mean radius, m Mass, kg Mean density, 103 kg/m 3 Period of rotation about axis, days
Sun 6.95.10 2 1.97.10 20 1.41 25.4
Earth 6.37.10 6 5.96.10 24 5.52 1.00
Moon 1.74.10 6 7.30.10 22 3.30 27.3
Planets of solar system Mean Sundie stanc, 10 6 km from the Siderial period, years
Mercury 57.87 0.241
Venus 108.14 0.615
Earth 149.50 1.000
Mars 227.79 1.881
Jupiter 777.8 11.862
Saturn 1426.1 29.458
Uranus 2867.7 84.013
Neptune^4494 164.79
11. Density of Substances
Solids p, g/cm 2 Liquids I P. g/cm^3
Diamond 3.5 Benzene 0.88
Aluminium 2.7 Water 1.00
Tungsten 19.1 Glycerin 1.26
Graphite 1.6 Castor oil 0.90
Iron (steel) 7.8 Kerosene 0.80
Gold 19.3 Mercury 13.6
Cadmium 8.65 Alcohol 0.79
Cobalt 8.9 Heavy water 1.1
Ice 0.916 Ether 0.72
Copper 8.9 Gases (under standard condi- p, kg/ra^3
Molibdenum 10.2 tions)
Sodium 0.97 Nitrogen 1.25
Nickel 8.9 Ammonia 0.77
Tin 7.4 Hydrogen 0.09
Platinum 21.5 Air 1.293
Cork 0.20 Oxygen 1.43
Lead 11.3 Methane 0.72
Silver 10.5 Carbon dioxide 1.98
Titanium 4.5 Chlorine 3.21
Uranium 19.0
Porcelain 2.3
Zinc 7.0
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