Flashcards for the aqa a level physics specification (2025 exams)
| FrontText | Fractional Uncertainty. |
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| BackText | The uncertainty given as a fraction of the measurement taken. |
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| FrontText | What is meant by a chain reaction of nuclear fission?What is meant by a self-sustaining chain reaction? |
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| BackText | Chain reaction: a heavy nucleus captures a neutron and splits into two lighter nuclei. The neutrons produced from the fission of this nucleus go on and cause further fission reactions.Self-sustaining chain reaction: at least one neutron produced in each fission reaction goes on to cause another fission reaction. |
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| FrontText | Define the moment of a force |
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| BackText | Force multiplied by perpendicular distance from the point to the line of action of the force |
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