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# Physics

## Coulomb’s Law and Electric Fields

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## Electrostatic Phenomena

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## What is Alternating Current

Most students of electricity begin their study with what is known as direct current (DC), which is electricity flowing in a constant direction, and/or possessing a voltage with constant polarity. DC is the kind of electricity made by a battery (with definite positive and negative terminals), or the kind of...

## Formula

The Formula Wheel Work W= F̅Δs cos θ The work formula includes the cosine of the angle between the force and distance for this reason. If the force and movement are in the same direction, than the angle is equal to 0 radians (or 0°). The cosine of zero is: cos0 = 1....