1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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.
You might be interested in
Why are the South American rainforests important to the whole world?
umka21 [38]

Answer:

The Amazon rainforest plays an important part in regulating the world's oxygen and carbon cycles. It produces roughly six percent of the world's oxygen and has long been thought to act as a carbon sink, meaning it readily absorbs large amounts of carbon dioxide from the atmosphere.

Explanation:

8 0
3 years ago
Broadleat deciduous forests grow best in regions with a-
SpyIntel [72]

Answer: b

Explanation: temperate climates with adequate rainfall

5 0
3 years ago
Trump 2020 <br> gvkjbhlnmahfdjganbhgydujk.h,gmfnbxdfncgmhj
Tanya [424]

Answer:

He is gonna loes

Explanation:

trump said if he loses he gonna move out of the country

5 0
3 years ago
Read 2 more answers
In which area would surface water most effectively infiltrate into the local groundwater system?
Rufina [12.5K]

Answer:

Option B is correct.

Explanation:

Infiltration depends greatly on the features of the soil. If the soil has excessive clay or mud, water will not find a way into the groundwater system and will remain as surface water.

An alluvial fan is a perfect location for this since there will be little or no resistance to the flowing water. The streams are already a connection with the groundwater system, and falling water will flow directly to it.

3 0
3 years ago
What are four pieces of evidence for continental drift?
Alexus [3.1K]

Answer:

- Shape of the continents

- Fossils of the same species found on continents that are not connected

- Evidence of ice sheets in places that are hot in the present

- Mid-ocean ridges

Explanation:

The continental drift theory is a theory that suggests that the continents are always on the move, thus they change their shape, location, collide with each other, move away from each other etc.

The shape of South America and Africa is one of the evidences. If the shapes of the continents are taken out of a map, and the eastern coast of South America and western coast of Africa are merged, they fit in perfectly.

There are numerous fossils of the same species of animals and plants that have been found all over the world, even though the continents are isolated and separated by water bodies.

In some places that are very hot in the presence, like South Africa, have evidence of ice sheets. In the current conditions that is simply not possible considering that the temperature in this part of the world goes well over 40 C degrees.

The mid-ocean ridges are very nice proof of the continental drift theory. They are one of the evidence that can be observed in the present, where new crust is constantly forming and pilling up, while pushing the old crust sideways further away from it.

8 0
3 years ago
Other questions:
  • the appalachian mountains are ___ of the rocky mountains north south east west? a. north b. south c. east d. west
    11·2 answers
  • Question 37 options: Cumulus clouds indicate a(n) ________ atmosphere. Rising warm air forcefully pushes through layers of coole
    14·1 answer
  • which region was under the influence of both russia and england? a. persia b. china or d. the caucasus
    15·2 answers
  • Tropical seas have a high rate of evaporation because of the direct rays of the sun. Because of this high rate of evaporation, w
    15·2 answers
  • 10) Higher income people tend to live near the center of the city in all but which of the following regions? A) Latin America B)
    13·1 answer
  • Jeremy decides to make a model of the Earth. He makes his model by drawing the Earth on a sheet of paper. When he finishes his m
    5·1 answer
  • How did the physical features of Europe influence medieval<br> settlements?
    13·2 answers
  • Compare and contrast the actions you should take to stay safe during a hurricane versus during a tornado.
    9·1 answer
  • Plz answer fast!!! What is a corbel?
    10·2 answers
  • Using examples, assess the changes brought by globalisation to one emgering country
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!