Flashcards
AQA AS Level Physics Unit 1
Cards in this deck (11)
- 1The K+ kaon is a strange particle. Give one characteristic of a strange particle that makes it different from a particle that is not strange.Contains a strange quark
Longer half-life than expected
Decays by weak interaction - 2—Second is not possible because lepton number is not conserved
- 3—Weak Interaction
- 4Deduce whether X is a meson, baryon or lepton, explaining how you arrived at your answer.X is a baryon because baryon number on the right is +1 and baryon number is always conserved.
- 5State what is meant by isotopesAtom with same number of protons but different number of neutrons
- 6Explain why the alpha particle, once outside the nucleus is unaffected by the strong nuclear force.The strong nuclear force has a short range and has no effect at more than 3 fm
- 7What is this type of decay called?Electron capture
- 8Where does the electron on the left-hand side of the equation come from?Inner shell of atom
- 9Explain why this reaction has to produce a neutrino rather than an antineutrinoTo conserve lepton number
- 10Complete the Feynman diagram
- 11The ionisation energy of a hydrogen atom is 13.6eV. State what is meant by the ionisation energy of hydrogen.The energy required to completely remove an electron from an atom's ground state
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- Questions from AQA AS Physics June 2011 Exam Paper
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- Nathan Schleider
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