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The First Three Minutes attempts to explain the early stages of the universe after the Big Bang.Weinberg begins by recounting a creation myth from the Younger Edda and goes on to explain how, in the first half of the twentieth century, cosmologists have come to know something of the real history of the universe.
Between about 2 and 20 minutes after the Big Bang nuclear fusion reactions convert a 1/7 mixture of neutrons and protons in to a mix of protons, deuterium (a proton fused with a neutron), 3 He, 4 He, with trace amounts of 7 Li and 7 Be. These reactions end when the temperature falls below the 0.07MeV needed for nuclear fusion.
The first three minutes after they wake up. The three minutes after they come home from school. The last three minutes of the day before they go to bed. When Martinez worked in an office, she felt ...
In Canadian football, the three-minute warning is given when three minutes of game time remain on the game clock in the first and second halves of a game. (If the ball is in play when the clock reaches 3:00, the three-minute warning is given immediately after the ball is declared dead.) The three-minute warning stops the game clock in all cases.
Not bad for three minutes of work. Read more: I tried the 12-minute workout Helen Mirren's used for her ‘whole life’ How do celebrity trainers meet their clients
FSU defeated Penn State 3-1 in Cary, N.C. in the Sweet 16 in 2021 and are 3-1 all-time against Penn State. Florida State defeats Pittsburgh 3-0, advances to College Cup
Hence, the formation of helium-4 was delayed until the universe became cool enough for deuterium to survive (at about T = 0.1 MeV); after which there was a sudden burst of element formation. However, very shortly thereafter, around twenty minutes after the Big Bang, the temperature and density became too low for any significant fusion to occur.
Jack notices, for the first time, a tiny scar Rebecca has just under her right eyebrow. She describes a long-ago moment when her Dad’s watch caught her while he pushed her on a swing.