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
Halo in a Haystack Killing" and 2002's "Unloved & Weeded Out". All tracks written by Converge. Halo in a Haystack Halo in a Haystack is the debut album by American metalcore band Converge, released in 1994 through Earthmaker Records. To fund the making of the record, vocalist Jacob Bannon saved up money from working at a nursing home. The record was released as a black vinyl and is not available in any other format. Only 1000 copies of this record were made and the record has not been reprinted since. However all of the record's tracks with the exception of the 9th track "Exhale"