3. Why does fusion normally not occur here on Earth?
3. Why does fusion normally not occur here on earth?
4. What force fights against fusion?
5. Where in the universe is fusion common?
6. Fission can release a great amount of energy. Why?
7. Which can best be described as a "tug-of-war" – fusion or fission?
8. Which can best be described as a splitting – fusion or fission?
9. Which can best be described as a pushing together – fusion or fission?
10. Which is currently common in nuclear power plants – fusion or fission?
plz answer the question in order
Nuclear fusion is the process by which atomic nuclei are joined together to form a new atomic nucleus. This is the process by which energy is created by stars like the sun. Most of the suns fuel is hydrogen gas, so one hydrogen nucleus is fused with another hydrogen nucleus. Hydrogen has one proton in its nucleus, so it literally is atomic addition, 1 + 1 = 2. Now we have an atomic nucleus with two protons in it, which is not hydrogen, it is helium. This process continues, liberating energy in the form of radiation, which is the energy we get from the sun. This process requires tremendous heat and pressure, much greater than what is here on Earth. The mass of our sun is such that 93 million Earths could fit inside it, so the gravitational attraction of the sun on the hydrogen and helium fuel at its surface help generate the pressure and temperature mentioned above.
Nuclear fusion requires massive amounts of pressure and heat to compress lighter weight atomic nuclei into heavier ones. While the necessary conditions are common on stars such as our sun, they do not occur naturally on earth.