Nuclear reactions- fission, fusion and chain reactions.

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1. Why isn't fusion a casual source of energy?

  • It can currently occur in space only and can't be taken to Earth
  • It's only a hypothetical idea
  • To produce the correct heat and pressure needed for fusion on Earth, it uses more energy than it makes
  • Because it doesn't produce any
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2. Why is fusion difficult?

  • Nuclei have to be really close before it occurs, and as unless really high temperatures and pressures are reached to overcome this, the positive charges repel one another
  • Because scientists haven't yet figured out how it works
  • Nuclei may blow up if they get to the correct heat and pressure for fusion,so there is a low chance of them being able to fuse
  • Trick question!

3. Fusion occurs when-

  • you mess around injecting things with odd stuff you probably shouldn't even be near
  • small nuclei join to make large ones
  • one big nuclei splits to form two daughter nuclei
  • pigs fly,it's not happened yet

4. How are chain reactions controlled?

  • use a different material to absorb neutrons,slwoing the recation down as there are fewer neutrons to stimulate more fission recations
  • nuclei are kept stable
  • we don't know how to control a hypothetical chain reaction yet
  • other

5. true or false- all nuclear reactions can be sources of energy

  • From a certain point of view
  • true
  • false
  • Idk


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