Nuclear fusion involves forcing two positively charged nuclei, such as deuterium (12H^2_1\text{H}12H) and tritium (13H^3_1\text{H}13H), together to form a larger helium nucleus.
Explain why an extremely high temperature is required for this fusion reaction to occur.
94 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity. Each one has a worked solution and a mark scheme showing where the marks go.