Complete the sentences to describe nuclear fusion:
To initiate fusion reactions, gas must be heated to extremely high temperatures to overcome electrostatic repulsion. Calculate the energy required to raise the temperature of 7.5 g of deuterium gas by 80 000 000 ∘C80\ 000\ 000\ ^\circ\text{C}80 000 000 ∘C.
Give your answer in scientific notation.
Before constructing full-scale commercial nuclear fusion reactors, researchers rely on computer simulations and small-scale prototype testbeds. Suggest two reasons why testing these models is important.
A major advantage of nuclear fusion over traditional fossil-fuel-based power generation is the absence of greenhouse gas emissions during operation. Explain one environmental consequence of the gases released by combustion of fossil fuels in traditional power stations.
Practise AQA GCSE Physics Nuclear fission and fusion (physics only) with exam-style questions for Foundation and Higher tier. 10 questions covering Nuclear fission and Nuclear fusion, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.