During a single fission event of plutonium-239 in a nuclear reactor, the total mass lost is 0.18 u0.18\text{ u}0.18 u. The reactor operates at an efficiency of 35%. How many fission events per second are required to generate 1.2 GW1.2\text{ GW}1.2 GW of electrical power? (Use: 1 u=1.66×10−27 kg1\text{ u} = 1.66 \times 10^{-27}\text{ kg}1 u=1.66×10−27 kg, c=3.00×108 m s−1c = 3.00 \times 10^8\text{ m s}^{-1}c=3.00×108 m s−1)
1.6×10191.6 \times 10^{19}1.6×1019
4.5×10194.5 \times 10^{19}4.5×1019
1.3×10201.3 \times 10^{20}1.3×1020
1.3×10141.3 \times 10^{14}1.3×1014
128 exam-style questions on AQA A Level Physics Radioactivity (A-level only), covering Rutherford scattering (A-level only), $\alpha$ , $\beta$ and $\gamma$ radiation (A-level only), Radioactive decay (A-level only), Nuclear instability (A-level only), Nuclear radius (A-level only), Mass and energy (A-level only), Induced fission (A-level only), and Safety aspects (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.