A the rate of spontaneous ssion in 238u is 67 decays per, Ask an Expert

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A. The rate of spontaneous ?ssion in 238U is 6.7 decays per second for each kg of uranium present. The remaining decays of the 238U nuclide are alpha decays. What is the probability that decay will occur by spontaneous ?ssion?

1. What are the characteristics of the following conservation laws: mass-energy, electric charge, linear momentum, angular momentum, baryon number, lepton number? Explain how they are related to fundamental laws of nature.

2. Why are storage rings useful for high-energy accelerators?

3. Why are colliding beams useful for particle physics experiments?

4. Can a baryon be produced when an antibaryon inter- acts with a meson? Explain.

5. What kinds of neutrinos are produced in the reaction µ,+ + e- S 2v? Explain.

6. What mediating particles are exchanged between two positrons? Between two quarks?

7. Which families of particles seem to be truly elementary?

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