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Question

The necessary condition for nuclear fusion is
  1. high temperature and high pressure
  2. low temperature and low pressure
  3. high temperature and low pressure
  4. low temperature and high pressure

A
high temperature and high pressure
B
high temperature and low pressure
C
low temperature and high pressure
D
low temperature and low pressure
Solution
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High temperature - The high temperature gives the hydrogen atoms enough energy to overcome the electrical repulsion between the protons.
High pressure - Pressure squeezes the hydrogen atoms together. They must be within 1×1015 meters of each other to fuse.

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