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.
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- 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.
Answer:
An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout.
Explanation:
For instance, a simple light switch opens and closes the circuit that connects a light to a power source. When you build a circuit, it's a good idea to disconnect the battery or other power source when the circuit is not in use.
Answer:
my explaination is my answer
hope this helps
(p.s:please mark me as brainlyest)
Explanation:
Flash floods are dangrous because
they have the destructive power of a normal flood combined with raging water, in addition to being unpredictable. Each year in the U.S., floods kill more people than hurricanes, tornadoes or lightning.
Answer:
Lava erupts from Earth and cools.
Explanation:
Correct, it is true. Hope this helps
