We calculate the actual speed of the tsunami by measuring the water depth at a point in time when the tsunami passes by. A tsunami's ability to maintain speed is directly influenced by the depth of the water. A tsunami moves faster in deeper water and slower in shallower water. So unlike a normal wave, the driving energy of a tsunami moves through the water as opposed to on top of it. Therefore, as a tsunami moves though deep water at hundreds of miles an hour, it is barely noticeable above the waterline. A tsunami is typically no more than 3 feet (1 meter) high until it gets close to shore. Once a tsunami gets close to shore, it takes its more recognizable and deadly form.
Adult head lice can live for approximately 24 hours away from a host, according to the Centers for Disease Control. Nymphs, or young head lice, can live for only several hours away from a host. Lice eggs are less dependent on a host, and they can live for up to one week without a host. Continue Reading.
The eggs are glued to the hair shaft very close to the scalp. Head lice live only about 30 to 40 days. They die in 1 or 2 days when removed from the head, and eggs die soon after being removed from the warm scalp.Head lice do not wander about rugs, furniture, or school buses seeking a host.he eggs hatch in about 8 or 9 days. The newly hatched louse (nymph) will suck blood for food and shed its skin (molt) three times as it develops into an adult over a 10-day period. The young lice and adults live their entire lives on the head, feeding on blood. The entire life cycle takes about 3 weeks.