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:
The answer is Batholithic intrusions
Explanation:
The Half Dome is an isolated mass suspended within the batholithic intrusions. Developed due to vertical jointing, exfoliation, and some glacial activity. Steep face of half dome began to take shape as thin slabs of rock b/w parallel vertical joints were loosened by weathering and mass wasting and fell away layer by layer. Tenaya Glacier cleared away exfoliation debris and talus flowing in direction parallel to trend of vertical joints, removed sheets of rock by plucking . Rounded back of Half Dome formed as curved shells of rock exfoliated
If you mean Fahrenheit and Celsius, than 16 F is greater than 16 C
They came because of Rinderpest. Before coming to South America, Africans in Africa depended on cattle such as cows to thrive. But Rinderpest brought to Africa by foriegners began to spread, and the cattle started to suffered from fevers, inflammation in the brain and dysentery. They also had major problems with Europeans and their industries. So they decided to settle in South America.
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Answer:
How does a unitary government differ from a federal government? In a unitary government, the power is held by one central authority but in a federal government, the power is divided between national government or federal government and local governments or state governments.
Explanation:
