A visco-elastic material is one with both the properties of a liquid and the properties of an elastic solid. The combination of these two types of properties is excellent when it comes to absorbing or spreading energy because these two types of materials deal with energy in different ways.
Electric and magnetic fields (EMF) are invisible lines of force that surround any electrical device. Electrical wiring, electrical equipment and power lines all produce electric and magnetic fields. Electrical fields and magnetic fields can be characterized by their wavelength, frequency and amplitude (strength).
Voltage is a measure of pressure in an electrical circuit, amps is a measure of the current flowing and watts is a measurement of power or the rate at which energy is used.. In this article you'll learn all about volts, watts, amps, ohms, current, power and resistance.