ings, and 17 in the crate; i. [http://www.nikeairmaxeuropa.com/ cheap nike air max shoes] e., to about 1,500 gauge measurements. The first step is to consider the general formula for the energy developed by a sub-aqueous explosion, already deduced, and to determine in what respects the quantities entering it are affected by the peculiar nature of this explosive, and by the mode in which the experiments were conducted. This formula (page 49) is the following: Care was taken, with both the ring and crate, to place the charge symmetrically with respect to the gauges; thus making the mean of their indications sensibly independent of variations in the direction of the, line of action of the forces. Hence, (J& -j- E)1 in the general formula can be reserved for future consideration; i. e., be temporarily assumed to be unity, provided the analysis be restricted to the mean of the gauges. This condition, of course, limits the applicability of the preliminary formula to the horizontal plane containing the charge. In the experiments with explosive compounds, detonating fuzes only were employed, and care was taken, by priming them with 20 grains of fulminating mercury and by increasing their number in any doubtful shot, to ensure an explosion of Burberry Outlet the first order. This precaution eliminates Rz from the general energy formula, and reduces the exponent (x) of Cheap Nike Air Max Sale the charge to unity. We have already seen with explosive mixtures—which being characterized by a more sustained although far inferior mean intensity, might be expected to be more affected by the absolute water pressure on the [http://www.fitflopsg-singapore.com/ fitflop sale] case than the compounds—that little gain results from increasing the submergence of the charge beyond a few feet. Indeed, the exponent of S in the pressure formula proved to be only ^. Before introducing this quantity in the formula for explosive compounds, it seemed, therefore, well to examine the data. The following table exhibits them for the ring trials—covering 36 shots: Analysis of submergence. The figures of this table establish the fact that variations in the submergence, between the limits of 6 and 100 feet, produce no sensible effect upon the energy or mean pressure developed by the explosion. To carry the investigation still further, two shots were fired, one in the 4-foot ring and the other in the crate. Each will be considered in turn. The 4-foot ring (shot No. 260) was suspended from a crane over the water, so that the top of the case (No. 1) containing a charge of 3 pounds of dualin was just awash. This left gauges Nos. 1 and 2 in the air; Nos 3 and 4, about 0.4 feet under water; and Nos. 5 and 6, 2 feet under water. The explosion made a tremendous report, and threw a jet of water about 150 feet into the air; many fish were killed; [http://www.nikeairmaxeuropa.com/ nike air max for sale] fragments of the tin can made indentations in the iron of the upper sockets and gauges. Shots Nos. 124, 231, and 234 were identical with No. 260, except in being submerged 35 feet. The folloffice:office" />
| 欢迎光临 精英乒乓网-买正品，到精英。买蝴蝶，到精英。 (https://bbs.cnpingpang.com/) | Powered by Discuz! X3.4 |