Overview When hydrogen fuel is exhausted within a stellar core, rapid changes take place within the star depending upon its mass and temperature. Some of these nuclear reactions result in…
read moreOverview Stellar evolution is the theory of the life cycle of stars. Scientists observe many different stars at various stages, starting with the earliest condensations from clouds of nebular gas…
read moreOverview Over the centuries, the number of elements has changed as new elements have been discovered. Some unstable, heavy elements have only been synthesized in atomic laboratories, so very little is known…
read moreOverview Energy provides the capacity of matter to do work. Without it, there would be no chemical reactions or physical reactions and matter would be inert. It exists in forms…
read moreOverview: Heat energy is kinetic energy caused by the vibration of particles within a substance. Temperature is the measure of the average heat energy within a sample of the substance,…
read moreOverview: What Are Subatomic Particles? Subatomic particles include those particles smaller than an atom. Some of those particles are charged, such as protons, which have a positive charge, and electrons,…
read moreOverview: What Are Superconductors? Superconductors are substances that do not resist electrical flow at all when they are cooled below a certain temperature. Electrical currents can flow indefinitely without using…
read moreOverview: The Beginnings of The Universe The astrophysical theory of how the universe began has been nicknamed “The Big Bang.” All matter was compressed into a incredibly dense, superheated mass…
read moreOverview: How Stars Are Made Astronomers and physicists have theorized that stellar formation happens when clouds of gas and interstellar dust collapse, molecules of hydrogen attract one another, and nuclear…
read moreThere is a relationship between distance, velocity and acceleration. When you understand how they interact, and their equations; they are much easier to grasp. The relationship between distance and velocity…
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