How Do We Know There Was a Big Bang

Q12: Why is the cosmic microwave background (CMB)so

Q13: Under what conditions will space-time be flat?<br>A)if

Q14: Why would a value of 100 km/sec/Mpc

Q15: What property of an antiproton is opposite

Q16: What properties does the cosmological principle require

Q18: As the universe cooled,it eventually reached a

Q19: What happens when a proton and an

Q20: What could be the origin of the

Q21: Which of the following does current evidence

Q22: During its early history,matter dominated the universe.