Multiple Choice
What is the situation with respect to matter and antimatter in the universe today?
A) There is perfect symmetry and balance between matter and antimatter.
B) There is a slight imbalance between matter and antimatter, with about one matter particle in excess for every billion matter-antimatter pairs.
C) There is far more matter than antimatter in the universe.
D) There is far more antimatter than matter in the universe.
Correct Answer:

Verified
Correct Answer:
Verified
Q29: If the average mass density ρ<sub>0</sub> had
Q30: To what does the phrase "Jeans length"
Q31: During the first one-ten-thousandth second (10<sup>-4</sup> s)
Q32: What is the difference between the virtual
Q33: The constant creation and annihilation of virtual
Q35: Which of the following statements correctly describes
Q36: Which of the four fundamental forces holds
Q37: At what point in the age of
Q38: Each of the following is an attribute
Q39: Energy and mass are equivalent according to