It is false that a divide separates river systems that travel in the same direction.
Answer:
b. flat rotation curves in spiral galaxies
Explanation:
Dark matter accounts for majority of the matter in the universe (about 85%). It is considered to be composed of subatomic particles which are yet to be discovered. Dark matter cannot be observed because it does not emit light that can be detected. Only its gravitational effect is visible.
Astronomers when calculated the mass of the visible matter and tried to account for the observed speed of stars in the galaxy, there was a mismatch. To understand what caused this mismatch, astronomers gave name to the invisible matter as the Dark Matter.
The expected velocity of stars should decrease away from the near the center of the galaxy but a constant velocity of stars was observed that is a relatively flat rotation curve was obtained.
Thus, flat rotation curves in spiral galaxies in an evidence of Dark Matter.
I believe the answer is <span>medical paternalism.
Happy studying ^-^
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The phrase “Global South” refers broadly to the regions of Latin America, Asia, Africa, and Oceania. It is one of a family of terms, including “Third World” and “Periphery,” that denote regions outside Europe and North America, mostly (though not all) low-income and often politically or culturally mar- ginalized.
If such an earthquake was to strike L.A., the epicenter and the magnitude would be <u>Los Angeles</u><u> </u>and <u>7.8 </u><u>o</u>n the Richter scale respectively.
<h3>What is the epicenter and magnitude of an earthquake?</h3>
The epicenter of an earthquake is the place on the surface of the Earth where the earthquake is first detected which in this case is Los Angeles.
The magnitude is measured on the Richter Scale and in this case is 7.8 on that same scale which means it was quite a strong quake.
Find out more on the epicenter at brainly.com/question/1969968.
