Meaning & History. From a Germanic name meaning ruler of the army, composed of the elements wald rule and hari army. The Normans brought it to England, where it replaced the Old English cognate Wealdhere.A famous bearer of the name was Sir Walter Scott (1771-1832), a Scottish novelist who wrote 'Ivanhoe' and other notable works.eaning & History. From a Germanic name meaning ruler of the army, composed of the elements wald rule and hari army. The Normans brought it to England, where it replaced the Old English cognate Wealdhere.
In classical mechanics, impulse (symbolized by J or Imp) is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector in the same direction.Impulse applied to an object produces an equivalent vector change in its linear momentum, also in the same direction.he term impulse is also used to refer to a fast-acting force or impact. This type of impulse is often idealized so that the change in momentum produced by the force happens with no change in time.
EMI is the energy that causes undesirable response to any equipment and can be generated by sparking on motor brushes, power circuit switches, activation of inductive and resistive loads, relay activation, switches, circuit breaks, fluorescent lamps, heaters, automotive ignitions, atmosphere discharges and even electrostatic discharges between persons and equipment, microwave sets, mobile communication equipment, etc.