Portal:Electronics

Carl Friedrich Gauss (Gauß) (30 April 1777 – 23 February 1855) was a German mathematician and scientist of profound genius who contributed significantly to many fields, including number theory, analysis, differential geometry, geodesy, magnetism, astronomy and optics. Sometimes known as "the prince of mathematicians" and "greatest mathematician since antiquity", Gauss had a remarkable influence in many fields of mathematics and science and is ranked as one of history's most influential mathematicians. Gauss was a child prodigy, and made his first ground-breaking mathematical discoveries while still a teenager. The cgs unit for magnetic induction was named gauss in his honor.

In physics, Coulomb's law is an inverse-square law indicating the magnitude and direction of electrostatic force that one stationary, electrically charged object of small dimensions exerts on another. It is named after Charles-Augustin de Coulomb who used a torsion balance to establish it.

The magnitude of the electrostatic force between two point charges is directly proportional to the magnitudes of each charge and inversely proportional to the square of the distance between the charges.

For calculating the direction and magnitude of the force simultaneously, one will wish to consult the full vector version of the Law

${\displaystyle {\vec {F}}={\frac {1}{4\pi \epsilon _{0}}}{\frac {q_{1}q_{2}}{|{\vec {r}}|^{3}}}{\vec {r}}={\frac {1}{4\pi \epsilon _{0}}}{\frac {q_{1}q_{2}}{|{\vec {r}}|^{2}}}{\hat {r}}}$

where ${\displaystyle {\vec {F}}}$ is the electrostatic force vector, ${\displaystyle q_{1}}$ is the charge on which the force acts, ${\displaystyle q_{2}}$ is the acting charge, ${\displaystyle {\vec {r}}={\vec {r_{1}}}-{\vec {r_{2}}}}$ is the distance vector between the two charges, ${\displaystyle {\vec {r_{1}}}\ }$ is position vector of ${\displaystyle q_{1}}$, ${\displaystyle {\vec {r_{2}}}\ }$ is position vector of ${\displaystyle q_{2}}$, ${\displaystyle {\hat {r}}}$ is a unit vector pointing in the direction of ${\displaystyle {\vec {r}}}$, and ${\displaystyle \epsilon _{0}}$ is a constant called the permittivity of free space.

This vector equation indicates that opposite charges attract, and like charges repel. When ${\displaystyle q_{1}q_{2}\ }$ is negative, the force is attractive. When positive, the force is repulsive.

• ... that the source material for Curtis Roads's electronic composition nscor was realized at six studios for a period of five years?
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Sirius Satellite Radio is one of two satellite radio (SDARS) services operating in the United States and Canada. (XM Radio is the other provider.) Headquartered in New York City, Sirius provides 69 streams (channels) of music and 65 streams of sports, news and entertainment to listeners. Music streams on Sirius carry a wide variety of music genres, broadcasting 24 hours a day, commercial-free. With most Sirius-enabled radios, the user can see the artist and song information on display while listening to the stream.