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.
Answer:
Higher temperatures may reduce the availability of drinking water by provoking the loss of mountain glaciers and mountain snowpack, and causing earlier spring snowmelts—all of which reduces the amount of available water in streams, rivers, and other bodies of water.
Explanation:
Height of the Mount Everest is <span>8,586 meters or 28,169 ft
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Answer:
The First Consequence of Greed is dissatisfaction and as for dissatisfaction, it destroys endeavor and enthusiasm for work, and causes the dissatisfied person to complain instead of giving thanks, and makes him lazy. Such a person abandons possessions which though few in number are licit and seeks possessions that are illicit and trouble-free.
Explanation:
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pls make brainliest :p
Answer:
i dont think we will get a time to think about how we felt in a cyclone but if i think about it, it will be scary cause we might get hit by a hard or sharp objects
Explanation:
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