Orders of magnitude (density)

Orders of magnitude (density)
Skylab measured several orders of magnitude of the Sun's density (top scale: 10−18 to 10−6 g⋅cm−3, equivalent to 10−15 to 10−3 kg⋅m−3) at different temperatures and heights above its surface.
List of orders of magnitude for density less than 1 kg/m3
Factor Multiple Value Item
10−27 1 yoctogram yg/m3 1 × 10−27 kg/m3 Very approximate density of the universe
10−24 1 zeptogram zg/m3
10−22 100 zg/m3 1 × 10−22 kg/m3 Probable lowest observed density of space in galactic spiral arm (1 hydrogen atom every 16 cubic centimeters)
10−21 1 attogram ag/m3
10−20
10−19
10−18 1 femtogram fg/m3 1 × 10−18 kg/m3 Observed density of space in core of galaxy (600 hydrogen atoms in every cubic centimetre)
Best vacuum from a laboratory (1 pPa)[1]
10−17
10−16
10−15 1 picogram pg/m3
10−14 2.0 × 10−14 kg/m3 (2.0 × 10−17 g/cm3) density of Sun's corona[2]
10−13 1.0 × 10−13 kg/m3 (1.0 × 10−16 g/cm3) density at top of solar transition region[2]
10−12 1 nanogram ng/m3
10−11 1.0 × 10−11 kg/m3 (1.0 × 10−14 g/cm3) density at bottom of solar transition region[2]
10−10
10−9 1 microgram μg/m3
10−8
10−7
10−6 1 milligram mg/m3
10−5 1.34 × 10−5 kg/m3 Earth atmosphere at 82 kilometre altitude;
star Mu Cephei's approximate mean density
10−4 0.1 gram g/m3 1.09 × 10−4 kg/m3 Earth atmosphere at 68 kilometre altitude;
2.0 × 10−4 kg/m3 (2.0 × 10−7 g⋅cm−3) Density of Solar photospherechromosphere boundary[2]
4.0 × 10−4 kg/m3 (4.0 × 10−7 g⋅cm−3) Density of Solar photosphere's lower boundary[2]
10−3 1 gram g/m3 1 gram g/m3 Vacuum from a mechanical vacuum pump;
density of Sun just below its photosphere[2]
10−2 10 gram g/m3 1.35 × 10−2 kg/m3 Earth atmosphere at 32 kilometre altitude
90 g/m3 Hydrogen gas, the least dense substance at STP
10−1 1.66 × 10−2 Earth atmosphere at 16 kilometre altitude[citation needed]


List of orders of magnitude for density 1 kg/m3 and greater
Factor Multiple Value Item
100 1 kilogram kg/m3 0.9 kg/m3 = 0.0009 g/cm3 Ultralight metallic microlattice.[3]
1.48 kg/m3 = 0.00148 g/cm3 Earth atmosphere at sea level
3 kg/m3 = 0.003 g/cm3 date=February 2009|reason=looks like an extremely low, not typical, density; aerogel is
101
102 534 kg/m3 = 0.534 g/cm3 Lithium at near room temperature
103 1 megagram Mg/m3
1 tonne t/m3
1000 kg/m3 = 1 g/cm3 Liquid water at 4 °C
1010 kg/m3 = 1.01 g/cm3 Average human body
1400 kg/m3 = 1.4 g/cm3 Average density of Sun
104 10000 kg/m3 10490 kg/m3 = 10.49 g/cm3 Silver (Ag)
11340 kg/m3 = 11.34 g/cm3 Lead (Pb)
13534 kg/m3 = 13.534 g/cm3 Mercury (Hg)
19100 kg/m3 = 19.1 g/cm3 Uranium (U)
19250 kg/m3 = 19.25 g/cm3 Tungsten (W)
19300 kg/m3 = 19.3 g/cm3 Gold (Au)
21450 kg/m3 = 21.45 g/cm3 Platinum (Pt)
22560 kg/m3 = 22.56 g/cm3[4] Iridium (Ir)
22590 kg/m3 = 22.59 g/cm3[4] Osmium (Os), the densest known substance at STP
105 150,000 kg/m3 = 150 g/cm3 Core of the Sun
106 1 gigagram Gg/m3
107
108
109 1 teragram Tg/m3 White dwarf
1010
1011
1012 1 petagram Pg/m3
1013 1 × 1013 kg/m3 2 × 1013 kg/m3 Universe at end of electroweak epoch (approximately)
1014
1015 1 exagram Eg/m3
1016
1017 2 × 1017 kg/m3 Atomic nuclei and neutron stars
1018 1 zettagram Zm/m3
1019
1020
1021 1 yottagram Yg/m3
1023 1023 kg/m3 Density of a hypothetical preon star
1096 5.1 × 1096 kg/m3 Planck density
∞ kg/m3 Density of a black hole at singularity

Notes

External links


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