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:
upper portion (6000ft - 6500 ft)
Explanation:
From the information given:
This activity involves exploring the Zion National Park geology. To achieve this, we need to download the Zion file & open it in Gougle Earth. This is followed by setting the vertical exaggeration to 0.5 & the measurement to feet/miles. The perspective view is also changed to a map view. Now, as viewed in Gougle Earth, the upper portion which is white in nature appears to be steeper than the lower portions. To the Toquerville, the area towards it is remarkably flat with slight undulations.
Answer:
Expert Verified
Explanation:
It could be argued that the economic relationship between Europe and its nonrenewable resources is that this led to expansion and colonization of other territories--especially in the Americas and Africa--which allowed them to obtain more resources.
The Kennedy Space Center was first created for the moon missions. He wanted manned lunar launches. The program was announced on September 1, 1961. The first ever manned launch from the Kennedy Center happened on October 11, 1968. The correct answer is C.
Answer:
What is the best way to help fossil fuels last longer?
Conserve Energy
Turning off lights, computers, televisions, video games and other electrical equipment when you're not using them.
Buying equipment that uses less electricity, including lights, air conditioners, heaters, refrigerators and washing machines. ...
Limiting the use of air conditioning.
Explanation:
