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6. What is exponential decay in half life?

  • When a quarter of the nuclei will decay in half the time etc etc.
  • When a quarter of the nuclei will decay in an hour
  • When the nuclei decays
  • When all the nuclei decays in 3 hours

7. What will experience air resistance?

  • Nothing
  • All objects moving in the air experience air resistance
  • Stationary objects
  • All objects moving undergroud

8. Advantages of nuclear power?

  • Produced waste is compact, low risk of nuclear accidents, very little background radiation produced
  • Little background radiation produced, cheap
  • Cheap, scenic and environmentally friendly
  • Renewable, cheap, scenic

9. What is terminal velocity?

  • A slow velocity
  • A constant velocity - when air resistance is equal to the weight of the object and the resultant force is now 0
  • An alternating velocity
  • A constant velocity - when resultant force is 100

10. How do moderators increase rates of fission?

  • Slowing down fast-moving electrons because slow moving electrons are more likely to be absorbed by the uranium atom
  • Slowing down fast-moving protons because slow moving protons are more likely to be absorbed by the uranium atom
  • Slowing down fast-moving neutrons because slow moving neutrons are more likely to be absorbed by the uranium atom
  • Removing the thermal energy produced in fission reactions so it can be used to heat water to produce steam to power turbines

11. Disadvantages of nuclear power?

  • Expensive, bad reputation with the public, waste is radioactive for years
  • Expensive and renewable
  • Lots of background radiation produced, waste is hard to deal with
  • High risk of nuclear accidents