longitudinal instability
21Attachment theory — …
22Balance board — A balance board is a device used for recreation, athletic training, brain development, therapy, musical training and other kinds of personal development. It is a lever, similar to a see saw, that the user usually stands on, usually with the left… …
23Tailless aircraft — A tailless aircraft (often tail less) traditionally has all its horizontal control surfaces on its main wing surface. It has no horizontal stabilizer either tailplane or canard foreplane (nor does it have a second wing in tandem arrangement). A… …
24India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …
25Viktor Dilman — Viktor Vasilyevich Dilman, also spelled Dil man (Russian: Виктор Васильевич Дильман, born March 11, 1926 in Proskurov (now Khmel’nitskiy), Ukrainian SSR, Soviet Union) is a Russian scientist performing research for USPolyResearch. He is best… …
26Dihedral (aircraft) — For other uses, see Dihedral. The upward tilt of the wings and tailplane of an aircraft, as seen on this Boeing 737, is called dihedral angle Dihedral angle is the upward angle from horizontal of the wings or tailplane of a fixed wing aircraft.… …
27glacier — glaciered, adj. /glay sheuhr/, n. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of… …
28Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
29nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
30Convection — This figure shows a calculation for thermal convection in the Earth s mantle. Colors closer to red are hot areas and colors closer to blue are cold areas. A hot, less dense lower boundary layer sends plumes of hot material upwards, and likewise,… …
