Answer True or False for each question. For the threequestions indicated also provide a full explanation; this is likelyto take at least two sentences.
1) Production of particle-antiparticle pairs ended because gammaray energy decreased as the U expanded.
2) At the beginning, all the energy in the universe was in theform of neutrinos.
3) By t = 15 min, the Universe had cooled enough thatnucleosynthesis ended.
4) In the Bottom-up scenario with Cold Dark Matter, smallstructures like dwarf galaxies form first.
5) It will be possible to measure all properties of a particlewith perfect accuracy if our technology increases.
6) By t = 1 sec, the U contained about 25 % He nuclei and therest H nuclei . Explain.
7) In quantum physics, Heisenberg's uncertainty principle saysthat matter and antimatter can appear spontaneously in empty space.Explain.
8) Our U contains mass because for every 109 matterparticles it created it also created 109+ 1 antimatterparticles. Explain.
