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The idea that primordial black holes make up dark matter gained prominence in 2015 [127] following results of gravitational wave measurements which detected the merger of intermediate-mass black holes. Black holes with about 30 solar masses are not predicted to form by either stellar collapse (typically less than 15 solar masses) or by the ...
Usually, the relationship between mass and weight on Earth is highly proportional; objects that are a hundred times more massive than a one-liter bottle of soda almost always weigh a hundred times more—approximately 1,000 newtons, which is the weight one would expect on Earth from an object with a mass slightly greater than 100 kilograms.
The gram as a unit may have it's difficulties, but they're not as bad as those of the kilogram. In exponential notation the gram is a much better unit to work with. Like the density of water is 1 gram/cubic cm or that the mass of the earth is 10E27.8 grams (approximately)and of the sun is 10E33.3 grams (approx.). And it fits well into the cgs ...
The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...
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Scientists claim that antimatter is the costliest material to make. [82] In 2006, Gerald Smith estimated $250 million could produce 10 milligrams of positrons [83] (equivalent to $25 billion per gram); in 1999, NASA gave a figure of $62.5 trillion per gram of antihydrogen. [82]
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Assuming that the lambda-CDM model of cosmology is correct, [1] dark energy dominates the universe, contributing 68% of the total energy in the present-day observable universe while dark matter and ordinary (baryonic) matter contribute 26% and 5%, respectively, and other components such as neutrinos and photons are nearly negligible.