The vacuum tube in a CRT can implode if it is broken or punctured. The surrounding air will rush violently into the unsealed vacuum in the CRT, spraying broken glass in every direction. Color CRTs may contain mercury or other potentially toxic materials.
Instructions. Build a hearth for a fireplace that is 16 inches deep, according to This Old House writer Harry Sawyers. This is the standard requirement for municipalities and homeowner associations. The hearth should also extend a minimum of eight inches on either side of the fireplace.
How Deep Is the Average Vagina? On average, the vagina is 3 to 4 inches deep during un-arousal periods, although some women have a vagina that is around 5 to 7 inches deep. As a woman becomes aroused, the vagina expands: as blood flows to the area, the cervix and uterus are pushed up by the upper two-thirds of the vagina to create more space.