The Gravitational Force
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Average Velocity and Instantaneous Velocity
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The Four Fundamental Forces of the Universe
Despite the apparent complexity within the universe, there are just four basic forces. These forces are responsible for all interactions known to science: from the very small to the very large to those that we experience in our day-to-day lives. More ...
Adding Vectors - Components of Vectors
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The Standard Model of Particle Physics
The Standard Model of physics is similar to the periodic table of the elements, But instead of listing the chemical elements, it lists the fundamental particles that make up the atoms of the chemical elements. More ...
The Normal Force
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Understand E = mc^2
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Magnetic Fields
A magnet creates a magnetic field around it that describes the force exerted on other magnets placed in the field. As with electric fields, the pictorial representation of magnetic field lines is very useful for visualizing the strength and direction of the magnetic field. More ...
JVectors - Unit Vectors and Adding Vectors by Componets
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Quarks
Quarks and gluons are the building blocks of protons and neutrons, which in turn are the building blocks of atomic nuclei. They are the elementary particles in the present standard model. More ...
