Items related to A Manual of Practical Physics, for Students of Science...
Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...Whatever the form of the empirical equation that is actually found, the value of k is determined by substituting in this equation a set of corresponding values for I, F, L, B, and D. Several such sets of values should be substituted and the average value for k used. If similar series of measurements are made upon rods of different materials, the values of , /8, 7, e are found to be very nearly the same for the different materials, but the values of k are different. This means that k depends upon the material of the bar and not upon its dimensions, whereas the other constants depend only upon the dimensions of the bar. Manipulation And Computation.--The rods to be experimented upon should be 70 or 80 cm. long and their transverse dimensions so selected that the same bars can be formed into two series, one in which the bars have constant depth and variable width, and another in which they have constant width and variable depth. The variable length is secured by adjusting the distance between the supporting knife edges. After a bar is placed on the knife-edges a weight pan is suspended from the bar about halfway between the knife edges and sufficient weight applied to insure good contact between the bar and its supports. On the addition of a known load the flexure of the bar, that is, the depression of the middle point, is measured. This measurement may conveniently be made by means of a microscope furnished with a micrometer eyepiece, or by means of a micrometer screw fastened to an adjacent support directly above the middle of the bar. In the latter case the instant when the micrometer screw comes into contact with the bar can be determined either by means of a telephone receiver in a battery circuit including the bar and micrometer...
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- PublisherRareBooksClub.com
- Publication date2013
- ISBN 10 1151845019
- ISBN 13 9781151845016
- BindingPaperback
- LanguageEnglish
- Number of pages68
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