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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