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Chapter 42: Q.3 (page 1235)
a. How do we know the strong force exists?
b. How do we know the strong force is short range?
As the nucleon is stable with positively charged particle, therefore there must be very strong attractive force existing inside the nucleus.
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The activity of a sample of the cesium isotope 137 Cs, with a half-life of 30 years, is 2.0 * 108 Bq. Many years later, after the sample has fully decayed, how many beta particles will have been emitted?
Use the potential-energy diagram in Figure to estimate the ratio of the gravitational potential energy to the nuclear potential energy for two neutrons separated by .
Does each nuclear energy-level diagram in FIGURE Q42.4 represent a nuclear ground state, an excited nuclear state, or an impossible nucleus? Explain.
What is the energy (in MeV) released in the alpha decay of
a. What are the isotopic symbols of all A = 19 isobars?
b. Which of these are stable nuclei?
c. For those that are not stable, identify both the decay mode and the daughter nucleus.
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