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Sonja [21]
3 years ago
13

When does a protostar become a true star?

Geography
1 answer:
Lubov Fominskaja [6]3 years ago
5 0

Answer:

C) when nuclear fusion begins in the core

Explanation:

  • <u>The protostar is a main-sequence star that has a core temperature that exceeds abut 10 million K and is needed for the hydrogen to operate efficiently and the </u><u>length </u><u>of this process depends on nature and the stellar </u><u>mass</u><u>, as the huge massive star have a greater and bigger core and fusion takes fast. </u>
  • A protostar is also called as primitive star and represents the earliest phases of the process of the stellar evolution and takes place after it leaves form the main sequence star.
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2. What effect did the geography of ancient Greece<br> have on its early development?
Alik [6]

Answer:

The geography of ancient Greece determined and restricted its development to only certain areas, such as sea trade.

Explanation:

Ancient Greece, or rather the Hellenic city-states, are considered as one of the most developed civilizations of their time, though there can be made a solid case against it. Anyhow, in the early stages of the development of these city-states, they were very restricted in their development because of geographic factors.

The climate was of the Mediterranean type, which is a good climate, but problem was that the topography was rugged and mountainous, so agriculture was very limited to only a handful of crops and herding. Because all of the city-states had access to the sea, they focused on developing trade through it, with goods such as grapes, wine, olives, olives, and olive oil the most traded. They needed good wood for building ships, and they didn't really have any of that type. This made them heavily dependent on the Macedonians who had an abundance of wood, and considering that there was open hate between the two, it was not an ideal situation.

7 0
3 years ago
A galaxy cluster contains between _____ galaxies.
ruslelena [56]
<span>50 to 1,000

A galaxy cluster contains anywhere from 50 to 1,000 galaxies. These are extremely large and hold millions of planets. So amazing!

I hope this helped. Have a great night!</span>
6 0
3 years ago
According to this map, a large part of the coast of West Africa consists of which of the following categories of land?
aivan3 [116]

Answer:

Tropical Rainforest

Explanation:

It is an equatorial climate with many tropical trees and rain.

7 0
3 years ago
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Water misters in outdoor spaces are designed to __________ in hot climates. A. increase water supplies for agriculture B. heat t
daser333 [38]

Answer:

C)  

cool the air through evaporative cooling

Explanation:

2020 edge

I got 100%

Plz mark be brainliest

3 0
3 years ago
Help me out pls.
Nutka1998 [239]

Answer:

D. Suez Canal

Hope this helps :)

6 0
3 years ago
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