Related to variance: standard deviation, variance analysis Variance The discrepancy between what a party to a lawsuit alleges will be proved in pleadings and what the party actually proves at trial.
Figure 2: Friction, pressure, and. separation are the major causes of. industrial static electricity. A charged insulator can remain charged for many hours. Opposite. polarity charges can exist on an insulator at the same time. Charges will not migrate on insulators.
Electricity is the presence and flow of electric charge. Its best-known form is the flow of electrons through conductors such as copper wires. Electricity is a form of energy that comes in positive and negative forms, that occur naturally (as in lightning), or is produced (as in generator). It is a form of energy which we use to power machines and electrical devices. When the charges are not moving, electricity is called static electricity.