An electric vehicle's battery pack has a usable energy capacity of 85 kW h. What is the decrease in the mass of the battery pack when it is completely discharged from full to empty?
9.4×10−16 kg9.4 \times 10^{-16}\text{ kg}9.4×10−16 kg
5.7×10−11 kg5.7 \times 10^{-11}\text{ kg}5.7×10−11 kg
3.4×10−9 kg3.4 \times 10^{-9}\text{ kg}3.4×10−9 kg
1.0 kg1.0\text{ kg}1.0 kg
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.