In what order are the fundamental forces unified as temperatures increase from low to high?
A) electromagnetic and gravity combine first, then strong, finally weak
B) electromagnetic and strong combine first, then weak, finally gravity
C) weak and strong combine first, then electromagnetic, finally gravity
D) electromagnetic and weak combine first, then strong, finally gravity
E) gravity and weak combine first, then electromagnetic, finally strong

Question

Quizplus · Accepted Answer

As the temperature increases, the weak force and electromagnetic force unify first into the electroweak force. At even higher temperatures, the strong force joins the electroweak force to form the Grand Unified Theory (GUT). Finally, at the highest temperatures, gravity may potentially unify with the GUT force, although this has not been experimentally confirmed. Therefore, the order is electromagnetic and weak first, then strong, and finally gravity.

In What Order Are the Fundamental Forces Unified as Temperatures