The protosun ceased to contract when its central temperature became high enough to sustain nuclear reactions.What temperature was this?
A) a million K
B) ten million K
C) a hundred million K
D) 700 million K

Question

Quizplus · Accepted Answer

The protosun stopped contracting when its core temperature reached about ten million Kelvin, which is the temperature required to initiate nuclear fusion of hydrogen into helium.

The Protosun Ceased to Contract When Its Central Temperature Became