This website on oil tankers, authored by United Nations Atlas of the Oceans, explains how their size is a consequence of how their volume and surface area scale up. A cross-section diagram shows how the relative size of...
This page from then University of California, Los Angeles Galactic Center Group provides images of the galactic center over most of the electromagnetic spectrum. Each image has explanatory text, and a background section...
This Public Broadcasting Service NOVA website contains information on shock waves and the speed of sound. It has a useful illustration of that shows how a sonic boom occurs at the intersection of the cone of the...
This site, authored by Daniel A. Russell of Kettering University, offers an animation that shows the formation of shockwaves from waves generated by a moving source. Photos show shockwaves of a bullet, an airplane, and...
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