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Nuclear Fission and Fusion GCSE Physics Doodle Science
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=MtDeczF0azY
Follow me!: / doodlesci • Doodle Science teaches you high school physics in a less boring way in almost no time! • GCSE Science • Script: • Nuclear power plants generate energy in today’s world by using nuclear fission. Fission is just another word for splitting. So the process of splitting a nucleus is called nuclear fission. • For fission to be done in any practical way we have to use big atoms like uranium or plutonium. • To start off the process, one of these isotopes must absorb a neutron. When this happens, the nucleus becomes unstable and splits into two smaller nuclei. Two or three neutrons are also released in the process, which can go on to cause a chain reaction. • A lot of energy is released during nuclear fission and I mean A LOT. You could meet the demand of an average American every year with just 275g of natural uranium. That’s the equivalent to burning 4.4 tonnes of coal! • Nuclear fusion as you probably guessed is the opposite of nuclear fission as you fuse atoms together instead of splitting them up. • In fusion we use the smallest atoms we can get because it doesn’t require as much energy as bigger atoms would to fuse. Specifically the isotopes hydrogen-1 and hydrogen-2. We create conditions that forces these atoms to be squashed so closely that they fuse into Helium-3 and releases about 3-4 times more energy than a fission reaction. • I’ll leave you to calculate the equivalent in coal.
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