In 2021, a private laboratory announced that they had achieved sustained deuterium-deuterium nuclear fusion inside a desktop acoustic cavitation chamber at a temperature of only 25 ∘C25\text{ }^{\circ}\text{C}25 ∘C.
Explain why physical scientists expressed deep skepticism regarding this announcement prior to any independent validation.
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.