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silver chloride
(Encyclopedia)silver chloride, chemical compound, AgCl, a white cubic crystalline solid. It is nearly insoluble in water but is soluble in a water solution of ammonia, potassium cyanide, or sodium thiosulfate (“h...motion sickness
(Encyclopedia)motion sickness, waves of nausea and vomiting experienced by some people, resulting from the sudden changes in movement of a vehicle. The ailment is also known as seasickness, car sickness, train sick...Strand, Paul
(Encyclopedia)Strand, Paul, 1890–1976, American photographer, b. New York City. Strand studied under Lewis Hine, who introduced him to Alfred Stieglitz. At Stieglitz's famed “291” gallery, Strand had his firs...Curtis, Edward Sheriff
(Encyclopedia)Curtis, Edward Sheriff, 1868–1952, American photographer and pioneer ethnographer known for his documentation of Native Americans, b. near Whitewater, Wis. Curtis was obsessed with photography from ...Albemarle Sound
(Encyclopedia)Albemarle Sound, large inland body of generally fresh water, c.55 mi (90 km) long, from 3 to 14 mi (4.8–22 km) wide, NE N.C. Shallow and tideless, the sound is separated from the Atlantic Ocean by a...Newton's laws of motion
(Encyclopedia)Newton's laws of motion: see motion. ...Nootka Sound
(Encyclopedia)Nootka Sound, inlet of the Pacific Ocean and natural harbor on the west coast of Vancouver Island, SW British Columbia, Canada, lying between the mainland and Nootka Island (206 sq mi/534 sq km). The ...retrograde motion
(Encyclopedia)retrograde motion, in astronomy, real or apparent movement of a planet, dwarf planet, moon, asteroid, or comet from east to west relative to the fixed stars. The most common direction of motion in the...echo sounder
(Encyclopedia)echo sounder, an older instrumentation system for indirectly determining ocean floor depth. Echo sounding is based on the principle that water is an excellent medium for the transmission of sound wave...sonic boom
(Encyclopedia) CE5 Sonic boom wave pattern from a supersonic aircraft and variation in pressure sonic boom, shock wave produced by an object moving through the air at supersonic speed, i.e., faster than the spee...Browse by Subject
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