At What Point Do the Weak Nuclear and Electromagnetic Forces $10^{12} \mathrm {~K} \text {, }$

question 73

Multiple Choice

At what point do the weak nuclear and electromagnetic forces split?

• A)never, they are still united
• B)at \(10^{12} \mathrm {~K} \text {, }\) when pair production starts for neutrons and protons
• C)at \(10 ^{- 43}\) seconds, when all four forces separate as the Planck Era ends
• D)at about four seconds, when at millions of degrees hydrogen forms helium
• E)after about \(10 ^ { - 10 }\) seconds, when the temperature drops below \(10 ^ { - 15 } \mathrm {~K}\)

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