Last week there were no FACTS on FRIDAY, but this week we're back on track again :D Today I think it's time to talk about the force - the nuclear force: 10 facts about the nuclear force, here you go!
- the nuclear force is the force that holds, or binds, a nucleus (of an atom) together, even though all the protons in it are being pushed apart by another force - the protons are like extremely strong magnets with the same pole; they repel each other
- without the nuclear force, there wouldn't be any nuclei; without nuclei there wouldn't be atoms, and without atoms there wouldn't be molecules; without the nuclear force there would be no life - no nothing, really, and you couldn't exist...!
- it is the strongest of the four fundamental forces, and it's really strong (the three others are electromagnetic force, gravity, and weak force); for example it is 137 times stronger than the elctromagnetic force, and compared to gravity, it is a 1000 million million million million million million (1000000000000000000000000000000000000000) times stronger!
- the nuclear force has a very short range - meaning that it only works when a particle "touches" a nucleus; or, in other words: if you get 0.000000000000001 meters from the center of a nucleus, you can't feel it anymore. This distance is called femtometer
- when you fission a heavy nucleus, you release some of the force that holds this nucleus together, and since it is so strong, you get soooo much energy from fission
- "strong force" is another word for the nuclear force (in Norwegian: "sterk kjernekraft")
- when you fuse two light nuclei (make a new nucleus by putting two nuclei together), you also release some of the nuclear force - and therefore you can get energy from fusion, like the sun does it :)
- it was after Chadwick discovered that there were neutrons (with no electric charge) inside the nucleus, in 1932, that the physicists discovered the nuclear force - neutrons don't feel the elctromagnetic force, like protons (or electrons, that have electric charge) do, and therefore it had to be something else that was holding the nucleus together...
- the nuclear force doesn't really care if a particle has a charge or not; the force between two protons, two neutrons, or a proton and a neutron are nearly the same <3
- we still don't understand everything about the nuclear force, even though has been worked on for eight decades...
Don't forget about "Question of the month" next week; I already have some very nice questions, but please, ask more!Ok, I think that's it for now - I have to go back to my figures and my tables, and then there is the weekly nuclear physics group meeting... Bon weekend, and may the force be with you <3