Answer: is constant
Explanation:
In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.
Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.
Armed conflict between the United States and the Soviet Union that led to the breakup of the Soviet Union.
Answer:
Dalits
Explanation:
Dalits are the lowest "religious" and "social" class in India. Often, being called "untouchables".
Temperature,the natureof the solvent,effect of ion type
The Appalachian plateau is the region of Georgia that is found to be the only source of coal in the region.
<h3>What are the Appalachian plateaus?</h3>
This is the term that is used to describe the North Western part of the Appalachian mountains. The regions that are contained here are known to stretch from the state of New York into Alabama.
Hence we can say that the The Appalachian plateau is the region of Georgia that is found to be the only source of coal in the region.
Complete question
which Georgia region is the only source of coal
Read more on the Appalachian here: brainly.com/question/24166716
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