C. Australia is moving at about ~7 centimeters a year, which is about 67 millimeters.
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.
(A) A and B are the two letters that represent gulfs.
<h3>
What are gulfs?</h3>
- A gulf is a large inlet from the ocean into the continent, usually having a narrower opening than a bay, however, this is not always the case in all geographical places thus named.
- The term gulf was traditionally applied to huge, indented areas of saline water surrounded by a coastline.
- Many gulfs, including the Persian Gulf, Gulf of Mexico, Gulf of Finland, and the Gulf of Aden, are important shipping lanes.
- The United States Gulf Coast, often known as the Gulf South, is the coastline that runs along the southern United States where it meets the Gulf of Mexico.
Therefore, (A) A and B are the two letters that represent gulfs.
Know more about Gulfs here:
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Complete question:
Each of the letters on the map above marks a body of water in Southeast Asia. Which two letters represent gulfs?
A. A and B
B. B and C
C. C and D
D. A and C
Answer:
➢ The economy of Ladakh is based on <u>small farms and herding</u>. The economy is a stable and self-reliant rural economy. Crops like barley, wheat, and peas are grown here. Keeping livestock, especially, yak, cows, sheep and goats, is a major part of pastoral farming.

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