1. What is critical mass?
- The amount of KE energy produced in fission
- The TIR.
- The minimum mass of fissile material (uranium) that is able to sustain a chain reaction.
- The maximum mass of fissile material (uranium) that is able to sustain a chain reaction.
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2. How do moderators increase rates of fission?
- 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
- Slowing down fast-moving electrons because slow moving electrons 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
3. What is terminal 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 slow velocity
- A constant velocity - when resultant force is 100
4. What is cold fusion?
- A theory that nuclear fusion could be done at room temperature (however it was rejected as it couldn't be validated)
- Fusion that is cold
- Slow moving electrons
5. How does the KE produced from fission, in nuclear power stations, power turbines?
- The KE faces air resistance
- When KE just powers turbines
- When KE is turned into heat and used to boil water to make steam - the steam powers turbines
- The KE is changed to electrical energy which powers the turbines
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