Science & Reason on Facebook: tinyurl.com Physics (Chapter 1): Fission And Fusion. — Subscribe to Science & Reason: • www.YouTube.com • www.YouTube.com • www.YouTube.com • www.YouTube.com — Consider the earth and a rocket ship which are bound together by gravity. If it takes work or energy to pull them apart, then the binding energy is the amount of energy it takes to completely separate them. Similarly the binding energy in a nucleus is the amount of energy it takes to completely separate the protons and neutrons, (collectively called nucleons.) There are two forces acting inside the nucleus of atoms. The nuclear force — a residuum of the strong force that holds quarks together — is pulling the neutrons and protons together — and the electric charge on the protons is pushing them apart. The strong force is a lot stronger than the electric force at short ranges up to two and a half times the proton diameter, but at larger distances the electric force dominates. This increase in binding energy continues until we get to iron and nickel where the nucleus has about 60 nucleons in it. At this point, the nucleus has a radius more than two and a half nucleons wide, which you remember is the range at which the repulsive ElectroMagnetic Force begins to dominate.. . So as we add nucleons past this point the electric force trying to tear the nucleus apart starts winning and each added nucleon is a little less-tightly bound. — The Cassiopeia Project is an effort to make high …
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Miracles of Modern Science closing out their amazing Uncharted series show at Ars Nova (2/10/08) as only they can. Get more moms here: amazingwow.org arsnovanyc.com
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humans into ancient history, ultiamtely arriving into modern day! … universe evolution origin life big bang earth sun solar system humans dna history ancient apes homo galaxy star cells space luca fish carbon cosmic hydrogen gravity supernova quarks planets protocells evolve bacteria cosmos lipids sponge flatworm pikaia reptiles primates mammals afarensis habilis erectus ergaster sapiens ice age agriculture abiogenesis evolutionary probiotic strings quantum physics science theory …
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humans into ancient history, ultiamtely arriving into modern day! … universe evolution origin life big bang earth sun solar system humans dna history ancient apes homo galaxy star cells space luca fish carbon cosmic hydrogen gravity supernova quarks planets protocells evolve bacteria cosmos lipids sponge flatworm pikaia reptiles primates mammals afarensis habilis erectus ergaster sapiens ice age agriculture abiogenesis evolutionary probiotic strings quantum physics science theory …
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origin of life, human evolution, ancient history, to modern day! … universe evolution origin life big bang earth sun solar system humans dna history ancient apes homo galaxy star cells space luca fish carbon cosmic hydrogen gravity supernova quarks planets protocells evolve bacteria cosmos lipids sponge flatworm pikaia reptiles primates mammals afarensis habilis erectus ergaster sapiens ice age agriculture abiogenesis evolutionary probiotic strings quantum physics science theory cosmology …
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back to strings If this membrane represents the three dimensions that we live in, then particles like quarks and electrons are strings that have their endpoints forever attached to those three dimensions. But the particle that is the force carrier for gravity, the graviton, is a closed loop. It has no ends that are constrained to our three dimensions. So if there are other dimensions, gravity will propagate freely there as well as in our familiar three. And that might explain why gravity …
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Miracles of Modern Science closing out their amazing Uncharted series show at Ars Nova (2/10/08) as only they can. Get more MoMS here
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