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.
<u>Answer:</u>
The people in the past used to make use of pots for various reasons like to cook food, store food, and to store water also. These pots were made in different shapes and sizes and were decorated well which showed the artistic side of these people and their way of using the things properly. It also told the archaeologist about the people of different times and civilization with the help of the pots of those periods.
I dont know lol I think vast weather changes such as global warming may cause extinction to species or adaptation to heat. But it depends solely on the lifeform
Were is the rest of the question...I mean were is the so called column
false
line g has an angle with the plane R
A plane is fully defined using a point on it and a line (vector) located on it
if there is a relation between line F and line G (perpendiculars for example) then answer could be true
