They're a shallow ocean habitat, filled with sea life and made of thin layers of calcium carbonate.
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.
In order to answer this question, you only need to know in which country does the Darfur region lie- and the answer is Sudan. This is also the correct answer to this question
The two countries that Sudan split into are Sudan and South Sudan.(South Sudan has been very unstable since the separation).
Answer:
¿Qué aporta, principalmente, la Geografía a las demás ciencias con las que comparte campo de estudio? Aporta el estudio de la distribución espacial de los fenómenos que se estudian. Aporta una visión de conjunto de lo que piensan todas las ciencias sobre el fenómeno que se está estudiando
The answer is D. Genghis Khan. hope this helped
