6 Extras

From Universe in Problems
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Problem 1

What is more important for the open space suit: heating or cooling function?

Problem 2

If the Universe is electrically neutral then how many electrons are there for each baryon?

Problem 3

Explain why the thermonuclear processes in the first stars considerably influenced the evolution of the Universe as a whole?

Problem 4

Why is the present relative abundance of chemical elements approximately the same as right after the creation of the Solar system?