Multiple choice

The conditions under which nuclear fusion takes place are

  1. high temperature and low pressure

  2. low pressure and low temperature

  3. low temperature and high pressure

  4. high pressure and high temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fusion requires temperature about 100 million Kelvin. Pressure squeezes the hydrogen atoms. They must be within 1 x 10-15 metres of each other to fuse. 

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