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1 markNuclear Energy

CSEC Physics · May/June 2017 · Paper 2 · Question 3(c)(ii)

Uranium isotope U-238 undergoes nuclear fission when struck by a neutron. Barium-139 and krypton-97 nuclei are emitted along with three neutrons as shown in the equation: 238/92 U + 1/0 n → 139/P Ba + 97/36 Kr + 3 1/0 n. Data provided: Uranium-238 = 398.350 × 10^-27 kg, Barium-139 = 232.560 × 10^-27 kg, Krypton-97 = 152.620 × 10^-27 kg, Neutron = 1.670 × 10^-27 kg, c = 3.0 × 10^8 ms^-1.

State the meaning of 'c' in Einstein's equation ΔΕ = Δmc².

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Other parts of this question

  1. 3(a)(i)What is meant by the term 'nuclear fission'?[1 mark]
  2. 3(a)(ii)State TWO advantages of utilizing nuclear energy.[2 marks]
  3. 3(b)(i)State ONE precaution that workers in nuclear power plants need to take.[1 mark]
  4. 3(b)(ii)Give TWO disadvantages of using nuclear reactors to generate energy.[2 marks]
  5. 3(c)(i)State the value of p.[1 mark]
  6. 3(c)(iii)Calculate the total mass of the elements formed after the reaction.[2 marks]
  7. 3(c)(iv)Calculate the energy released in the reaction.[4 marks]
  8. 3(c)(v)State ONE use of the energy released from the reaction.[1 mark]

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