vacuum pick-up
121Comparison of analog and digital recording — This article compares the two ways in which sound is recorded and stored. Actual sound waves consist of continuous variations in air pressure. Representations of these signals can be recorded using either digital or analog techniques. An analog… …
122March Upcountry — This article is about the science fiction novel. For Xenephon s account of the march of the Ten Thousand through Persia, see Anabasis (Xenophon). March Upcountry   …
123MythBusters (2010 season) — Country of origin Australia United States No. of episodes 25 (includes 4 specials) Broadcast Original channel …
124Erectile dysfunction — Impotent redirects here. For the classification of poverty, see impotent poor. Erectile dysfunction Classification and external resources ICD 10 F52.2, N48.4 …
125Tea — For other uses, see Tea (disambiguation). Tea Longjing tea being infused in a glass …
126Vietnam War — Part of the Cold War and the Indochina Wars …
127Optical rotation — (optical activity) is the turning of the plane of linearly polarized light about the direction of motion as the light travels through certain materials. It occurs in solutions of chiral molecules such as sucrose (sugar), solids with rotated… …
128Polychlorinated biphenyl — PCBs redirects here. For printed circuit boards, see printed circuit board. Labelling transformers containing PCBs …
