Diseases of Ficus Elastica. Ficus elastica, more commonly known as the rubber tree, is a tropical-looking plant that thrives outdoors only in very warm climates, including U.S. Department of Agriculture plant hardiness zones 10 and 11.Gardeners living in cooler areas frequently enjoy growing rubber trees as houseplants, however.iseases of Ficus Elastica. Ficus elastica, more commonly known as the rubber tree, is a tropical-looking plant that thrives outdoors only in very warm climates, including U.S. Department of Agriculture plant hardiness zones 10 and 11.
A passive car alarm is one that turns on automatically. Once the ignition is shut off and all of the doors are closed, a passive car alarm sets itself. The alarm is called a passive alarm because the driver doesn't have to do anything to arm it.ystem. A car alarm system can often switch between being passive and active. The owner can toggle the system back and forth, or he can call a professional to change it from one to the other. It's entirely up to the owner which option he prefers to protect his vehicle.
A passive-active cell is the concentration cell series where metals rely on an ultra-bonded passive film (typically an oxide) for protection against corrosion. Mainly, salts that accumulate on the metal substrate will have the film broken with water. In turn, the active metal that is underneath the existing film will be open to corrosion.