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3 marksNuclear Energy

CSEC Physics · January 2012 · Paper 2 · Question 3(b)(ii)

Nuclear fission is a nuclear reaction where a moving neutron strikes an atom's nucleus, splitting it into lighter nuclei, producing free neutrons and photons (gamma rays). One such reaction is given as: ¹₀n + ²³⁵₉₂Uranium → ᴬ₅₆Barium + ⁹⁰_Z_Krypton + 3(¹₀n) + energy.

The energy released in the given reaction is 1.8 × 10⁻¹² J. Calculate the excess mass (mass change) in this reaction.

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Other parts of this question

  1. 3(a)(i)Albert Einstein put forward a theory that if the energy of a body changes, then its mass also changes. State the equation which relates these changes, clearly…[3 marks]
  2. 3(a)(ii)State TWO arguments EACH for and against the utilization of nuclear energy.[4 marks]
  3. 3(b)(i)Calculate the values of A and Z.[2 marks]
  4. 3(c)By calculating P and Q, identify the nucleus X. [c = 3.0 × 10⁸ ms⁻¹][3 marks]

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