See Hint At the extreme temperatures right after the Big Bang, our models predic
ID: 3517060 • Letter: S
Question
See Hint
At the extreme temperatures right after the Big Bang, our models predict that the relative strengths of the fundamental forces were different from what they are now: at the very beginning, they would all possibly be exactly the same, such that they could not be told apart from one another.
As the universe cooled, the relative strengths would change in such a way that the forces would separate from each other, one by one. The following figure shows the timescale (t), temperatures (T), and densities (?) at which the Big Bang theory predicts this happened, along with a pictorial representation of the size of the universe and what was occurring within it.
A.The first stars formed 3 minutes after the Big Bang.
B.Grand unified theory is the combination of the strong nuclear force, weak nuclear force, and electromagnetic force.
C.The strong nuclear force was the first force to separate itself from the others
.D.All four fundamental forces were separated from one another 10-13 seconds after the Big Bang. E.The universe expanded much more quickly than usual during the inflation period.
Today r- 14 x 10 yr T-2.73 K p 10- kg/m2 Formation of galaxies and sta T 18 K -10-24 kam? Transparent t 105 yr T= 4000 K Strong Weak Electro- Fog nuclear nuclear magnetic Gravity 10-17 kgm? force force force mTemperature of Sun's surface Temperature of Sun's center Big Bang t3 min T 10* K p 10 kg/m Electron-positron pair annihilation t=15 s ? T- 3 x 10 K 10 kg/m Electro- Weak magnetic force force Density of white dwarf Density of neutron star Electroweak breaks r10-13 s T 10 K Strong force Electro- weak force ? = 1035 kgm? t 103 s T 1028 K p 1083 kg/m3 GUT breaks Grand unified Gravity Inflation 10-43 s TOE breaks- T-103 K p 10 kg/m3 Planck Era Theory of everything Big Bang Eras in the evolution of the universe. The left side shows the four forces separating in stages after the Big Bang. The right side shows the temperature and density of the universe at different key times. As the universe expanded and cooled following the Big Bang, it went through a series of phases determined by what types of particles could be created freely at that temperature. Later, the structure of the universe was set by the gravitational collapse of material to form qalaxies and stars, and by the chemistry made possible by elements formed in starsExplanation / Answer
B. Grand unified theory is the combination of strong nuclear force , weak nuclear force and electromagnetic force.
E. The universe expanded much more quickly than usual during the inflation period.