ISBN: 1130282864

Paperback, [EAN: 9781130282863], RareBooksClub.com, RareBooksClub.com, Book, [PU: RareBooksClub.com], RareBooksClub.com, This historic book may have numerous typos and missing text. Purch… More...

Paperback, [EAN: 9781130282863], RareBooksClub.com, RareBooksClub.com, Book, [PU: RareBooksClub.com], RareBooksClub.com, This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1858 Excerpt: ... the cloud is 6x 1130=6780, or 1-r miles. The air is a better conductor of sound when humid than when dry. Thus a bell is heard better just before a rain; and this fact lends some countenance to an opinion of the ancients, that sound is heard better by night than by day. Humboldt was particularly struck with this fact, when he heard the noise of the great cataracts of Oronoco, which he describes as three times greater in the night than in the day. The distance to which sound may be heard, will of course vary with its force, and various other circumstances which are incapable of being reduced to an exact law. Volcanoes, in South America, have sometimes been heard at the distance of three hundred miles; and naval engagements have been heard at the distance of two hundred miles. The unassisted human voice has been heard from Old to New Gibralter, a distance of ten or twelve miles, the watchword All's Well given at the former place being heard at the latter. Sounds are heard to a much greater distance over water than over land, and farther on smooth than on rough surfaces. 304. Liquids are good conductors of sound. Indeed, sound is conveyed with far greater velocity in water than in air, and this too in consequence of its greater elasticity; for since water has been found by Perkins and others, capable of compression and of restoring itself when the compressing force is removed, it is to be accounted not only elastic, but as exceeding aeriform bodies in elasticity, in proportion as the force required to compress it is greater. Dr. Franklin having plunged his head below water, caused a person to strike two stones together beneath the surface, and heard the sound distinctly at the distance of more than half a mile. By similar experiments, it has been ascertained,..., 75, Science & Math, 226680, Agricultural Sciences, 11242, Archaeology, 13439, Astronomy & Space Science, 226685, Behavioral Sciences, 13469, Biological Sciences, 13570, Chemistry, 13592, Earth Sciences, 14459, Environment, 3045861, Essays & Commentary, 13824, Evolution, 13837, Experiments, Instruments & Measurement, 13871, History & Philosophy, 13884, Mathematics, 14452, Nature & Ecology, 14545, Physics, 14603, Reference, 13640, Research, 13642, Science for Kids, 14631, Technology, 1000, Subjects, 283155, Books<

ISBN: 1130282864

Taschenbuch, [EAN: 9781130282863], Rarebooksclub.com, Rarebooksclub.com, Book, [PU: Rarebooksclub.com], Rarebooksclub.com, 56047011, Fachbücher, 56517011, Agrarwissenschaften, 56779011, A… More...

Taschenbuch, [EAN: 9781130282863], Rarebooksclub.com, Rarebooksclub.com, Book, [PU: Rarebooksclub.com], Rarebooksclub.com, 56047011, Fachbücher, 56517011, Agrarwissenschaften, 56779011, Archäologie, 56507011, Astronomie & Raumforschung, 56172011, Bildung & Erziehung, 56458011, Biowissenschaften, 56048011, Chemie, 56534011, Essays & Kommentare, 56177011, Evolution, 56192011, Experimente, Instrumente & Messungen, 56092011, Geowissenschaften, 56204011, Geschichte & Philosophie, 56214011, Mathematik, 56432011, Nachschlagewerke, 56375011, Physik, 56441011, Technologie, 56453011, Verhaltensforschung, 54071011, Genres, 52044011, Fremdsprachige Bücher<