Scientists think that, soon after the Big Bang, the four fundamental forces of n

Question

Scientists think that, soon after the Big Bang, the four fundamental forces of nature were united into superforce, and ___ was the first to split off from the others. a. the strong force b. electromagnetic c. the weak force d. gravity e. nucleosynthesis Which list correctly orders objects from the first one to form after the Big Bang to the last one to form. a. neutral atoms, protons, nuclei b. protons, nuclei, neutral atoms c. nuclei, neutral atoms, protons d. protons, neutral atoms, nuclei e. nuclei, protons, neutral atoms Which of the four fundamental forces is the weakest of all? a. electromagnetic b. gravity c. weak nuclear d. magnetic e. strong nuclear What fundamental force is responsible for holding the nucleons together inside atomic nuclei? a. electromagnetic b. gravity c. weak nuclear d. gluons e. strong nuclear How would scientists describe the antiparticle of an electron? a. It would have the same charge but opposite spin. b. It would have the same mass but opposite charge. c. It would have the opposite charge and higher mass. d. It would have the opposite spin and higher mass. e. It would have the opposite charge but same spin. What would the universe be like if there were complete symmetry between matter and antimatter? a. It would look similar to our universe, but half of it would be composed of antimatter.

Explanation / Answer

15. Option d, gravity. The gravitational force was the first one to split off from the others.

16. Option b. First electrons formed, then heavy particles like Protons and neutrons. Protons and neutrons combined to form nuclei but temperature was very high to capture electrons. The universe had to cool to form the first atom.

17. Option b, gravitational force is weakest of them all.

18. Option e, Strong nuclear force.

19. Option b. Antiparticles have same mass but opposite charge. For electron, it is a Positron.

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