No it does not effect the temperature of the earth.
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.
The correct answer is C. changes hands frequently
That means that there is no consistency in their work which only means bad things for the state. Laws keep getting changed and people become angrier and angrier with the government.
The answer for that would be the p wave it is also one of the fastest
Answer:
Correct answer is a. fertile soil and fresh water source near the St. Lawrence river
Explanation:
A is correct because this is the area with the best climate that allows people to live more comfortable life.
B is not correct as remaining on Natives are living in northern areas.
C is not correct as oil resources are spread across the country and in the oceans.
D is not correct as trading developed after the cities were created here.
