This formula is probably the most famous formula known: Energy = mass x (speed of light)2. This shows the relationship of mass to energy, so how could it not affect me?! With only 3 symbols, this equation is able to explain energy. Something so simple, yet so broad. It's used in every day life, and basically makes up the universe. I couldn't imagine life without e=mc2 because it's the sun and light!
I think the four "forces": gravity, electromagnetism, the weak nuclear force, and the strong nuclear force have little in common besides the fact that they govern every matter interaction. I find that their name's are pretty much self explanatory. Gravity is the force that we're the most familiar with. It's the weakest of the four forces but it has an unlimited range. It depends on the mass of two bodies and the distance between them and the dominance of gravity is due to its range and constant attractive nature. Electromagnetism is less than 1% of the strong force but has infinite range. It has an attractive and repulsive nature which can either come together or cancel out. This is how atoms stay together. The weak nuclear force operates on the extremely short distance scales found in an atomic nucleus responsible for radioactive decay. The strong nuclear force has a limited range to subatomic distances and keeps quarks together inside protons and neutrons. Basically, it glues particles together.
The exact function of gravity? Does anyone know? We know what it does to us on earth and lack of it in space, but its function for working the way it does is still a mystery. The range is unlimited and effects everything, but can easily be overcome with a different force. One thing though, is that without gravity, things would definitely be up in the air! (...get it?)
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