During the first one-ten-thousandth of a second (10-⁴ s)of the life of the universe,antiprotons were very common.For every billion antiprotons,how many protons were there?
A) exactly 1 billion since protons and antiprotons were created in equal numbers
B) slightly more than 1 billion, thus producing the matter we see today
C) a totally unknown number since the early universe was opaque and we cannot see what conditions were like then
D) 10 billion, thus producing the dark matter we see today

Question

Quizplus · Accepted Answer

The question states that there were "very common" antiprotons, but does not specify that they were created in equal numbers with protons. Therefore, it is likely that there were slightly more protons than antiprotons, which would result in the matter we see today. Option A is incorrect as it assumes equal creation of protons and antiprotons. Option C is incorrect as it states that the number is unknown, but this is not necessarily the case as we can make reasonable assumptions based on current knowledge. Option D is incorrect as it refers to dark matter, which is not mentioned in the question.

During the First One-Ten-Thousandth of a Second (10-⁴ S)of the Life