Oxygen is also used for medical purposes, which includes supplying it in packed cylinders to patients who struggle to breathe, or it is used by mountaineers at high altitudes, underwater divers, astronauts walk
Because it is inert, argon is considered to be non-toxic. It is a normal component of air that we breathe every day. Argon is used in blue argon laser to repair eye defects and kill tumors. Argon gas may replace nitrogen in underwater breathing mixtures (Argox) to help reduce the incid...
The advent of underwater skin diving and scuba diving in the 1920s and ’30s brought advances in the design and manufacture of goggles, which were necessary safety equipment for these pursuits. Although some swimmers used goggles while training or for recreational swimming in the 1960s, they ...
(PbSO4) coatings that are formed prevent continued reaction. Because of this general chemical resistance, considerable amounts of lead are used in roofing, as coverings for electric cables placed in the ground or underwater, and as linings for water pipes andconduitsand structures for the ...
See how researchers developed a fully maneuverable fish robot modeled on the electric fishLearn how researchers developed a highly maneuverable ribbon-finned underwater robot, modeled on the knifefish of South America. See all videos for this article ...
The largest single-purpose structure to be built by themaritimecivil engineer is not directly connected with loading, unloading, or berthing but is indispensable to prolonging the life of ships. This is the dry dock, which permits giving necessarymaintenanceto the underwater parts of ships. The ...