single seismometer
21Pendulum — This article is about pendulums. For other uses, see Pendulum (disambiguation). Simple gravity pendulum model assumes no friction or air resistance …
22Enhanced 911 — Enhanced 9 1 1 or E9 1 1 service is a North American telecommunications based system that automatically associates a physical address with the calling party s telephone number, and routes the call to the most appropriate Public Safety Answering… …
23Infrastructure — Public infrastructure Assets and facilities Airports · Bridges · Broadband …
24Hualālai — View of Hualālai over 1800 lava flow Elevation 8,271 ft (2,521 m) …
25Mechanical engineering — Mechanical engineers design and build engines and power plants …
26Polymath — A polymath (Greek polymathēs , πολυμαθής, having learned much )The term was first recorded in written English in the early seventeenth century Cite web url=http://www.etymonline.com/index.php?search=polymath searchmode=none title=Online Etymology …
27List of inventors — This is a list of inventors. See also: List of scientists, Timeline of invention, List of inventions named after people, List of inventors killed by their own inventions, and . Alphabetical list compactTOC NOTOC A * Vitaly Mikhaylovich Abalakov,… …
28Timeline of Chinese history — History of China ANCIENT …
29Fault (geology) — Part of a series on earthquakes Types Foreshock • Aftershock • Blind thrust Doublet • Interplate • …
30List of mechanical engineers — This is a list of mechanical engineers, notable people who were trained in or practiced mechanical engineering, nuclear engineering, etc. This is not a list of engineers practicing that profession.See also List of engineers for links to other… …
