physics additional notes edexcel
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Physics Additional (P2)Static Electricity
Uses:
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ResistanceWhy do appliances heat up?
LDR and Thermistors
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Voltage current graphs
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Distance and velocity time graphs
If the line becomes negative, this means the object is returning to its start position
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RadioactivityRadioisotopesA radioisotope is an unstable isotope (An atom of an element with the same number of protons but different a number neutrons e.g. C-12 and C-14). These radioisotopes eject matter from their nucleus in order to gain stability. There are 3 things that they can eject from their nucleus:
How do radiations ionise atoms?
Nuclear Fission and FusionFission
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How fission can be controlled:
Fusion
Nuclear Power stations
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Positives and negatives
Background Radiation
Half-lifeThe time taken for half of the undecayed radioisotopes in a sample to decay.
Half-life can be measured in Becquerels:
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Carbon DatingCarbon dating uses half-life to work out the age of a fossil