and "top secret" documents, equipped with "energy smart" system with optical illuminated indicators for power saving stand-by mode and environmental protection. a special cutting system can shred an a sheet in about microchips which become absolutely unreadable even if special electronic optical microscopes...
of a wave and draw your own diagrams of waves. wave worksheet. different parts of a longitudinal wave droppler effect you can calculate the frequency of a wave by, the number of. meters, what is the frequency of the wave?...