Explanation: Hello, the reason was because the titanic hit an iceberg
Answer:
Europe remains a region composed of many distinct cultural regions due to its unique geography.
Explanation:
Europe's physical geography, conditions and sources, and human geography can be analyzed independently. Europe's rich agrarian and manufacturing variety has presented the continent a hotbed of commerce and trade for centuries. It is centrally established between the couple other “Old World” regions, Africa and Asia.
Because light travels more than 800 thousand times as fast as sound does.
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.
