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Since the atmosphere of the Earth has a mass of about 5.14 × 10 18 kilograms (1.133 × 10 19 lb), [24] the mass of 3 He in the Earth's atmosphere is the product of these numbers, or about 37,000 tonnes (36,000 long tons; 41,000 short tons) of 3 He. (In fact the effective figure is ten times smaller, since the above ppm are ppmv and not ppmw.
1 H + 1 H → 2 H + e + + ν e + 0.42 MeV. The hypothetical effect of a bound diproton on Big Bang and stellar nucleosynthesis , has been investigated. [ 18 ] Some models suggest that variations in the strong force allowing a bound diproton would enable the conversion of all primordial hydrogen to helium in the Big Bang, which would be ...
0.8–2.1 × 10 12 kg Global biomass of fish [114] 4 × 10 12 kg Global annual human food production [115] 4 × 10 12 kg World crude oil production in 2009 (3,843 Mt) [116] 5.5 × 10 12 kg A teaspoon (5 ml) of neutron star material (5000 million tonnes) [117] 10 13: 1 × 10 13 kg Mass of comet 67P/Churyumov–Gerasimenko [118] 4 × 10 13 kg
Given two bodies, one with mass m 1 and the other with mass m 2, the equivalent one-body problem, with the position of one body with respect to the other as the unknown, is that of a single body of mass [1] [2] = = + = +, where the force on this mass is given by the force between the two bodies.
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J⋅s, which is equal to kg⋅m 2 ⋅s −1, where the metre and the second are defined in terms of c and Δν Cs. —
The kilogram per cubic metre (symbol: kg·m −3, or kg/m 3) is the unit of density in the International System of Units (SI). It is defined by dividing the SI unit of mass, the kilogram, by the SI unit of volume, the cubic metre. [1]
Without major changes to the Big Bang theory itself, BBN will result in mass abundances of about 75% of hydrogen-1, about 25% helium-4, about 0.01% of deuterium and helium-3, trace amounts (on the order of 10 −10) of lithium, and negligible heavier elements. That the observed abundances in the universe are generally consistent with these ...
At 0 °C, the freezing point of water, a cubic metre of water has slightly less mass, 999.972 kilograms. A cubic metre is sometimes abbreviated to m^3 , M3 , m**3 , cum , m3 , CBM , cbm when superscript characters or markup cannot be used (e.g. in some typewritten documents and postings in Usenet newsgroups).