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.
Answer:
D. Irish Catholics and English Protestants
Explanation:
The answer for this question would be choice A) Angola or the first option.
Answer:
<em>Phillipines </em>was the first country in the region to be claimed by European colonizers.
Explanation:
Colonised by the Portuguese and Spanish people.
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I agree with mixed economy because mixed economy will always protect the private property and it will give room for capital freedom in the economy.
<h3>What is economic system?</h3>
Economic system is a type of system of production in which resources produced in a location are allocated and also distribution of goods and services are carried out within a geographic area.
Therefore, I agree with mixed economy because mixed economy will always protect the private property and it will give room for capital freedom in the economy.
Learn more about economic system below.
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