Absorption and Emission Spectra
Absorption are produced when atoms absorb energy and create dark lines or gaps in the spectrum. Absorption spectra can range from narrow lines to broad bands. Emission spectra are emitted by an atom or compound when electrons transition from a higher energy state to a lower energy state. More ...
Average Velocity and Instantaneous Velocity
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Adding Vectors - Components of Vectors
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The Normal Force
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JVectors - Unit Vectors and Adding Vectors by Componets
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Antimatter
Antimatter is a substance made up of subatomic particles that have the same mass as ordinary matter, but with opposite electric charge and parity. For example, an electron has a negative charge, while the positron, has a positive charge. More ...
How to Enrich Uranium
Uranium enrichment increases the percentage of uranium-235 (U-235) in uranium. Natural uranium has 0.7% U-235, while nuclear reactor fuel needs 3-5%. More ...
Force and Mass
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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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