Electrical conduction is the movement of electrically charged particles through a transmission medium. The movement can form an electric current in response to an electric field. The underlying ...

Energy close energyEnergy can be stored and transferred. Energy is a conserved quantity. can transfer by heating from a hotter region to a cooler region. The temperature of the hotter region decreases ...

A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...