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:
THE UNITED STATES IS A PLACE TO BE SAFE,SMELL THE AIR,AND GREAT ANIMALS TO SAVE
The correct answer is B. Tissue
Explanation:
The tissue is a basic level of organization that is composed of dozens or thousands of cells together, and that composes organs. The image presented illustrates tissue because each of the circles or shapes in it depicts a cell. Moreover, in this tissue, all cells are quite similar in structures and functions. Besides this, the image corresponds to adipose tissue that stores fat or lips and it is part of organs such as the skin. According to this, the correct answer is B.
Yes, many in the Rocky Mountains and Southern and Northern California
It states that layers of sediment are originally deposited horizontally due to the effects of gravity.
