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Gravity is by far the weakest of the four fundamental forces that exist in nature—the others being the electromagnetic force, and the strong and weak nuclear forces. Yet over large distances it is gravity that dominates.
In physics, gravity (from Latin gravitas 'weight' [1]) is a fundamental interaction primarily observed as mutual attraction between all things that have mass. Gravity is, by far, the weakest of the four fundamental interactions, approximately 10 38 times weaker than the strong interaction, 10 36 times weaker than the electromagnetic force and ...
23 lut 2017 · Gravity: A Very Short Introduction looks at the development of our understanding of gravity since the early observations of Kepler, Newtonian theory, and Einstein’s theory of gravity. It also discusses the recent detection of waves of gravitational radiation that were predicted by Einstein.
4 cze 2014 · Gravity has a classical description called general theory of relativity (GTR), and it adequately describes the "force" of gravity as a consequence of space-time geometry.
25 wrz 2024 · Gravity, in mechanics, is the universal force of attraction acting between all bodies of matter. It is by far the weakest force known in nature and thus plays no role in determining the internal properties of everyday matter.
Specific gravity. Density is the mass-to-volume ratio of a substance. Density is a physical characteristic of matter. Each substance has a characteristic density that can be used as one hint in identifying a substance. Gases have very low density, usually expressed in g/L. For example, air density is around 1.224 g/L at sea level and 15 o C.
Gravity is an attractive force that draws two objects together. Its strength approximately increases with the masses of the two objects but decreases with the square of the distance between them. That means that if the Moon were twice its current distance from Earth, the gravitational tug between the two would be just one fourth of what it is now.
