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71List of membranophones by Hornbostel-Sachs number — The Hornbostel Sachs system of musical instrument classification groups all instruments in which sound is produced primarily through a vibrating membrane. This includes all drums.*2: Instruments in which sound is produced through a vibrating… …
72Directly struck membranophones — is one of the sub categories of musical instruments found in the Hornbostel Sachs system of musical instrument classification. The type of membranophones or drums found in this group are those instruments that produce sound when struck directly… …
73useable — adjective 1. fit or ready for use or service (Freq. 1) the toaster was still functional even after being dropped the lawnmower is a bit rusty but still usable an operational aircraft the dishwasher is now in working order • Syn: ↑functional, ↑ …
74Elitzur-Vaidman bomb-tester — In Physics, the Elitzur Vaidman bomb testing problem is a thought experiment in quantum mechanics, first proposed by Avshalom Elitzur and Lev Vaidman in 1993. An actual bomb tester was constructed and successfully tested by Anton Zeilinger, Paul… …
75MUF — Die Frequenz des blauen Signals ist größer als die MUF und passiert ins All. Die Frequenz des grünen Signals ist kleiner als die der MUF, aber größer als die MUF der E Schicht, und liegt …
76Tent — For the tetanus neurotoxin (TeNT), see Tetanospasmin. A modern two person, lightweight hiking dome tent; it is tied to rocks as there is nowhere to drive stakes on this rock shelf A tent is a shelter consisting of sheets of fabric or other… …
77Mass–energy equivalence — E=MC2 redirects here. For other uses, see E=MC2 (disambiguation). 4 meter tall sculpture of Einstein s 1905 E = mc2 formula at the 2006 Walk of Ideas, Berlin, Germany In physics, mass–energy equivalence is the concept that the …
78Medical cannabis in the United States — Main articles: Cannabis in the United States and Medical cannabis United States cannabis laws.   States with medical …
79Customer relationship management — (CRM) is a widely implemented strategy for managing a company’s interactions with customers, clients and sales prospects. It involves using technology to organize, automate, and synchronize business processes principally sales activities, but… …
80Terrestrial Trunked Radio — TETRA redirects here. For other uses, see Tetra (disambiguation) TErrestrial Trunked RAdio [ETSI EN 300 392 2 v3.2.1] (TETRA) (formerly known as Trans European Trunked RAdio ) is a specialist Professional Mobile Radio [http://www.tetra… …
