Answer the following statement(s) true (T) or false (F)
Einstein’s photon model is consistent with the results of two-slit interference experiments involving light.
FALSE
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Radioactive Decay: Today, uranium contains 0.72% 235U (half-life = 0.70 billion years) and 99.28% 238U (half-life = 4.5 billion years). At a time 1.9 billion years ago, what was the fraction of 235U in uranium?
A. 3.53% B. 4.72% C. 4.90% D. 6.75%
What is interesting about Saturn's large moon Titan?
A) It is one of Saturn's two large moons. B) It has a 2:1 resonance with Mimas and a 4:1 resonance with the Cassini gap. C) It has its own moon. D) It orbits Saturn in a retrograde sense. E) It has an atmosphere.
The nucleus makes up about what percentage of
the mass of an atom? a) 25% b) 50% c) 81.3% d) more than 99%
A 57-kg researcher absorbs 6.3 × 108 neutrons in a workday. The energy of the neutrons is 2.6 MeV. The relative biological efficiency (RBE) for fast neutrons is 10. What is the equivalent dosage of the radiation exposure, in mrem, of this worker?
A) 4.6 mrem B) 1.4 mrem C) 2.9 mrem D) 14 mrem E) 46 mrem