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Phase

Phase Shift Reflection Standing Waves Part 2

This lesson covers the basic concepts of standing waves, phase shift, and the reflection and transmission of one-dimensional transverse waves. http://www.physicseh.com/ Free …

USPS Seeks to Phase Out IRCs

If the US Postal Service (USPS) gets its way, it will no longer sell International Reply Coupons (IRCs) after January 27, 2013. …