By Eric Scerri
Whilst used to be radium chanced on? who're Dmitri Mendeleev and Glenn T. Seaborg? Who came upon uranium’s radioactivity? Which aspect turns out to be useful for courting the age of Earth? And why doesn’t gold have a systematic identify? 30-Second components offers you with the very foundations of chemical wisdom, explaining concisely the 50 most vital chemical components. This booklet makes use of useful glossaries and tables to speedy tune your wisdom of the opposite sixty eight parts and the relationships among them all.
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Extra resources for 30-Second Elements: The 50 most significant elements, each explained in half a minute
A. Sheﬃeld and R. Engelke Superdetonation Overdriven Detonation Time Steady Detonation Initial Shock Thermal Explosion at Time τ Interface Distance Fig. 26. Time–distance diagram for a homogeneous initiation process according to Campbell et al.  and Chaiken  in which a thermal explosion occurs at the driver-explosive interface, where the explosive has been shocked the longest, and a superdetonation (running into precompressed material) immediately develops. The superdetonation speed is higher than the normal detonation speed and overtakes the original shock, producing an overdriven detonation in the undisturbed material.
Schematic and streak records were provided by L. G. Hill of Los Alamos National Laboratory. Fig. 24. Data reduction from a PBX 9502 mushroom test showing the high explosive’s ability to turn corners . The data are the breakout times for the various angles from the centerline of the sample. The parts of the data obtained from the center, right, and left traces (see Fig. 23b) are shown as diﬀerent symbols. Samples with better corner turning ability spread to larger angles at earlier times. This test has been able to assess the eﬀect of density and particle size on the corner turning ability of PBX 9502.
Various aspects of a magnetic particle velocity gauge experiment using an explosive sample: (a) shows the gauge pattern – nine particle velocity gauges and three “shock tracker” gauges, (b) shows how the gauge is installed in the sample, and (c) shows how the target is situated in the gas gun. The technique was originally developed by Vorthman  and Vorthman et al.  and has been innovated over the years to the method presently used at LANL . strength, and the gauge velocity vs. time is produced; this voltage is recorded by a digitizer.
30-Second Elements: The 50 most significant elements, each explained in half a minute by Eric Scerri