Some of the benefits of river Nile is that it has very fertile flood plains resulting from seasonal floods along the banks. But although Nile river has countless benefits or advantages. Such as:
Used for washing clothstransportationIrrigationfarmingAnd reeds that grew along the banks called papyrus. They are used for writing thing in the ancient times.
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.
56, and that is only the magor volcanos inIndonesla
