Did you know?
An acre of hemp produces more paper than an acre of trees. Paper made from hemp lasts for centuries, compared to 25-80 years for paper made from wood pulp. The US Declaration of Independence was written on hemp paper.
1. Hinduism is a religion of 330 million gods. 2. Hindus believe that the soul can be reincarnated, undergoing a cycle of rebirth. 3....
A periscope is an optical instrument which enables a person to obtain a view otherwise impossible to see. Periscopes allow a submarine cre...
The word stomach is derived from the Latin stomachus which is derived from the Greek word stomachos, ultimately from stoma (στόμα), "mo...
People in ancient cultures who lived in earthquake areas built earthquake-resistant buildings. In Buddhist pagodas in Japan the central shaft is sunk into the ground. Flexible joints attach the roof sections to the central shaft. The shaft sways during an earthquake, but the roof doesn't fall.
Chínese architects designed tentlike structures. Each building had a sloping, tiled roof. A central wooden beam supported the length of the roof. Each end of the beam had vertical shafts driven deep into rock. Lightweight bamboo walls hung from the roof, almost like curtains. The walls absorbed energy by swaying, since they were supported by the roof and not by the ground.
In the American Southwest and in Central America, adobe buildings remain standing after numerous earthquakes. Adobe walls are made of clay bricks with a crisscross network of twigs. This construction gives flexibility to each wall. The walls absorb the energy of earthquake waves to remain standing.
What is a depressant?
A depressant is a drug that reduces the activity of various body functions. Some depressants such as anesthetics, sedatives, antiepileptics, narcotics analgesics, and some muscle relaxants, slow nervous and muscular activity by acting on the central nervous system. Tranquilizers are depressants that affect only part of the nervous system. They induce relaxation without causing total depression.