«Amazing physics» 9 сыныпқа арналған
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білімділік: to tell about the application of the force of elasticity in nature in English дамытушылық: read information about the use of elastic force in nature and develop the language тәрбиелік: to raise interest, increase motivation in learning Құрал-жабдықтар: компьютер, презентация, сөздік, оқу материалы, кроссворд Сабақ барысы: 1.Ұйымдастыру кезеңі - Good morning! Write the date on the board, please. Get ready for the lesson. 2. Activity Сабақтың басында оқушылар төменде көрсетілген кестені толтырады. Ағылшын тілінде бүгінгі сабаққа байланысты кез келген терминді жазады. Word - сөз, definition - анықтама, picture – сурет. Word Definition Picture ________________ ________________ ________________ 3. Learning new material As a result, deformation of the physical body is always a force that counteracts it, trying to return the body to its original position. Determine the elastic force in the simplest case can be by Hooke's law. The threads used in making elastic webbing are usually cut from spread sheets. To him whose elastic and vigorous thought keeps pace with the sun, the day is a perpetual morning. If the viscous variety be rapidly cooled, or the more highly heated mass be poured into water, an elastic substance is obtained, termed plastic sulphur. A peculiar variety of the last named, called "Blue John," is found only near Castleton; at the same place occurs the remarkable elastic bitumen, "elaterite." In like manner our present law (20) would apply to the kind of obstruction that would be caused by an actual physical division of the elastic medium, extending over the whole of the area supposed to be occupied by the intercepting screen, but of course not extending to the parts supposed to be perforated. The tissues of an animal or plant are all under a certain pressure, caused, in the one case, by the expulsive action of the heart and the restraint of the skin and other elastic tissues, and, in the other case, by the force of the rising sap and the restraint of the periderm or bark. 28 The mesogloea in the hydropolyp is a thin elastic layer, in which may be lodged the muscular fibres and ganglion cells mentioned above, but which never contains any connective tissue or skeletogenous cells or any other kind of special mesogloeal corpuscles. The envelope is double, consisting of an external chitinous stratified shell, and an internal thin elastic membrane. In his eighteenth year, while still a student in Edinburgh, he contributed two valuable papers to the Transactions of the same society - one of which, " On the Equilibrium of Elastic Solids," is remarkable, not only on account of its intrinsic power and the youth of its author, but also because in it he laid the foundation of one of the most singular discoveries of his later life, the temporary double refraction produced in viscous liquids by shearing stress. In such cases the contact of an insect or other body with those processes is sufficient to liberate the pollen often with elastic force, even when the anther itself is not touched. Elastic web weaving by power looms is carried on to a great extent, and the manufacture of lace and net curtains, gimp trimmings, braids and cords. Elaborate regulations were in force, but no one knows how elastic they were in practice. The wood is strong, light and very elastic, forming an excellent material for small masts and spars, for which purpose the trunks are used in America, and exported largely to England. Between 1882 and 1889 a series of papers on certain points in the electromagnetic theory of light and its relation to the various elastic solid theories appeared in the American Journal of Science, and his last work, Elementary Principles in Statistical Mechanics, was issued in 1902. That it is elastic, with narrow limits, is proved by its clear ring when struck with a hard body in circumstances permitting of free vibration. жүктеу/скачать 3.19 Mb. Достарыңызбен бөлісу:
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