Brush discharge plastics. The ability of an electrical discharge to cause an explosion in flammable atmospheres is measured by the "effective energy" of the discharge. The effective energy of brush discharges is 10-20 mJ, much larger than that of corona discharges 0.1 mJ. Therefore, brush discharges are considered an explosion hazard, while corona discharges are not. Brush discharges can occur from charged insulating plastics (for example polythene) to a conductor. Brush discharge A brush discharge is an electrical disruptive discharge similar to a corona discharge that takes place at an electrode with a high voltage applied to it, embedded in a nonconducting
Crown Point, Tobago lighthouse consist of a square metal tower with gallery and lantern high and has a focalheight of . It is powered by solar unit and emits an alternating group of four white flashing repeated every 20 seconds visible up to . Crown Point, Tobago Crown Point is a town in southwestern Tobago, Trinidad and Tobago. It contains the Arthur Napoleon Raymond Robinson International Airport which was formerly known as the Crown Point Airport. It is near Store Bay, Buccoo Reef, and Pigeon Point. The name component "Crown" does not derive from the English word "crown", but from the Englisch word