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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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What do the numbers on the yellow lines mean on the surface area map?
atroni [7]

Answer:

The numbers indicate the amount of air pressure, in millibars, that each line represents. These lines and numbers are necessary find out exactly where High and Low pressure systems are on the maps.

3 0
3 years ago
The point farthest north on the globe is the
masya89 [10]

Answer:

the North Pole

Explanation:

The point furthest north on Earth is the North Pole. The point opposite to the North Pole is the southernmost point, the South Pole. The North Pole is located in the central part of the Arctic Sea. These points are very important as the parallel and meridians are orientated in accordance to them, with every meridian passing through them, while the prime parallel, the Equator is set right in the middle between the two.

6 0
3 years ago
Due to human demand because of its importance to life, the Earth's most precious resource is     A. soil.B. saltwater.C. freshwa
Mrrafil [7]
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5 0
3 years ago
Read 2 more answers
Q.1 Define Tectonic plates, Mountainous rift and earthquake
Stels [109]

Answer:

Defined as below

Explanation:

Plate tectonics are defined as the pieces of Earth's crust floating over the liquid asthenosphere or the movements of sheets/plates of hard rock over the rigid mantle. Varying in thickness moving in the directions to there orientation. They are either oceanic or continental plates

Rift valleys are generally linear or are highlands that separated by actions of geologic agents. It may be formed by a divergent or a convergent plate movement. 0n earth can occur on all height above mean sea levels. Extraterrestrial Rift valleys have also been found on planets in the solar system.  Example is Eastern valley of africa.

Earthquake is a shaking of the earth from the interior due to the vibrations and waves produced due to the movement of geo-material beneath the earth's crust. These waves are measured on a Richter scale and range from 1 to 12 caused by sliding of the earth plates from the convergent, divergent and transform boundaries. Like the ring of fire an earthquake prone region.

5 0
3 years ago
How are the northern part of the North European Plain and the lowlands of the West Siberian Plain similar?
Natalija [7]
The Northern European plain and lowlands of West Siberian Plains have a lot of differences in terms of their characteristics. The only similarity between the two would be the vast complex land that both of these lands have. 

I hope this answered your question.
4 0
3 years ago
Read 2 more answers
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