Mass, energy and binding energy Quiz
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5 questions, one answer each
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1. A nuclear reaction releases 1.8 × 10⁻¹¹ J. What is the decrease in mass, using c = 3.00 × 10⁸ m s⁻¹?
- A. 2.0 × 10⁻²⁸ kg
- B. 6.0 × 10⁻²⁰ kg
- C. 1.6 × 10⁶ kg
- D. 5.4 × 10⁻³ kg
2. A nucleus has a mass defect of 0.0200 u. What is its binding energy?
- A. 46.6 MeV
- B. 18.6 MeV
- C. 0.0200 MeV
- D. 931.5 MeV
3. Which nucleus has the highest average binding energy per nucleon?
- A. Hydrogen-2
- B. Helium-4
- C. Iron-56
- D. Uranium-235
4. Why does the fusion of hydrogen-2 nuclei release energy?
- A. The product has a lower binding energy per nucleon
- B. The product has a higher binding energy per nucleon, so mass decreases
- C. Nucleons are destroyed during fusion
- D. The product has more mass than the reactants
5. The binding energy of a nucleus is best described as
- A. the energy released when electrons are removed from its atom
- B. the kinetic energy of the nucleons inside it
- C. the energy that holds the electrons around it
- D. the minimum energy needed to separate it into its nucleons