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111Spark plug — A spark plug (also, very rarely nowadays, in British English: a sparking plug) is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed aerosol gasoline by means of an electric spark.… …
112Spectral line — Continuous spectrum Emission line …
113Outer space — For other uses, see Outer space (disambiguation). The boundaries between the Earth s surface and outer space, at the Kármán line, 100 km (62 mi) and exosphere at 690 km (430 mi). Not to scale Outer space is the void that exists beyond any… …
114Mushroom cloud — created by smoke billows Ascending cloud from Redoubt Vol …
115Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …
116Elephant's Trunk nebula — The Elephant s Trunk nebula is a concentration of interstellar gas and dust in the star cluster IC 1396 and ionized gas region located in the constellation Cepheus about 2,400 light years away from Earth [cite journal last = Matthews first = H. I …
117H-alpha — In physics and astronomy, H alpha, also written Hα, is a specific emission line created by hydrogen at 6562.8 Angstroms.According to the Bohr model of the atom, electrons exist in quantized energy levels surrounding the atom s nucleus. These… …
118Colligative properties — are properties of solutions that depend on the number of molecules in a given volume of solvent and not on the properties/identity (e.g. size or mass) of the molecules.[1] Colligative properties include: relative lowering of vapor pressure;… …
119Xenon flash lamp — A xenon flash lamp is an electric glow discharge lamp designed to produce extremely intense, incoherent, full spectrum white light for very short durations. Construction The lamp comprises a sealed tube, often made of fused quartz, which is… …
120List of molecules in interstellar space — This is a list of molecules that have been detected in the interstellar medium, grouped by the number of component atoms. The chemical formula is listed for each detected compound, along with any ionized form that has also been… …
