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 ...
Rutherford's Experiment and The Structure of the Atom
Ernest Rutherford's (1871-1937) surprising discovery about the interior of the atom is most fundamental in explaining so many well-known phenomena. He took us from the plum pudding model to the planetary model of the atom we use today. More ...
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 ...
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 ...
Vectors Position and Displacement
information about STEM Physics More ...
The Periodic Table of the Elements
The periodic table arranges all the known elements into rows (called periods) and columns (called groups). All elements in the same period have the same number of electron shells. Elements in the same group have the same number of valence electrons. More ...
Force Vectors
information about STEM Physics More ...
Bohr's Explanation of the Hydrogen Spectrum
In 1915, Danish physicist Niels Bohr proposed that electrons orbit the nucleus of an atom at fixed energy levels, and that orbits further from the nucleus have higher energy levels. Electrons emit energy in the form of light when they return to a lower energy level. More ...
The Gravitational Force
information about STEM Physics More ...
Force and Mass
information about STEM Physics More ...
