Physics > AQA > Physics A PHYA4/2 Unit 4 Fields and Further Mechanics Section B (All)

Physics A PHYA4/2 Unit 4 Fields and Further Mechanics Section B

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1 (a) State one similarity and one difference between an elastic collision and an inelastic collision. similarity ...................................................................................... ......................................... ............................................................................................................................................. difference ............................................................................................................................ ............................................................................................................................................. (2 marks) 1 (b) An unstable isotope of neodymium, 144 60 Nd, decays into an isotope of cerium, Ce, by emitting an α particle. 1 (b) (i) Complete the following decay equation. (1 mark) 1 (b) (ii) The α particle is emitted from a stationary 144 60 Nd nucleus at a speed of 9.3 × 106m s–1 . Calculate the recoil speed of the daughter nucleus. recoil speed ........................... m s–1 (2 marks) (02) 2 144 60Nd→ Ce + α ...... ...... ...... ...... WMP/Jan13/PHYA4/2 Do not write outside the box 1 (b) (iii) Show that, when a stationary 144 60 Nd nucleus decays, the kinetic energy of the recoiling cerium nucleus is only about 3% of the kinetic energy of the emitted α particle. [Show More]

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