Wake Up

Wake Up may refer to:

Television

Music

Albums

Songs

Peace Sells... but Who's Buying?

Peace Sells... but Who's Buying? is the second studio album by American thrash metal band Megadeth, released on September 19, 1986. The project was originally handled by Combat Records, resulting in the first mix of the album being co-produced by Randy Burns. Capitol Records then bought the rights to the album and hired another producer, Paul Lani, to mix it himself. The album's front cover, featuring the band's mascot Vic Rattlehead, was created by Ed Repka. The recording of the album was difficult for the band because of the ongoing drug issues the members had at the time. This was the last Megadeth album to feature drummer Gar Samuelson and guitarist Chris Poland, who were fired shortly after the album's promotional tour for drug abuse. The title track, noted for its politically conscious lyrics, was released as the album's lead single.

Peace Sells... but Who's Buying? is regarded as a thrash metal classic and as an album that gave prominence to extreme metal. It has been featured in several publications' best album lists, including Robert Dimery's 1001 Albums You Must Hear Before You Die and Martin Popoff's Top 500 Heavy Metal Albums of All Time. The album has been reissued several times over the years. In 2004, the album was remixed and remastered by Megadeth frontman Dave Mustaine, with extensive liner notes detailing the album's background. In 2011, the three different versions were reissued as part of the album's 25th anniversary celebration. All of them, with the exception of the 2004 mixes, feature new remastering.

Wake

In fluid dynamics, a wake may either be:

or both.

Wake effects caused by viscosity

The wake is the region of disturbed flow (often turbulent) downstream of a solid body moving through a fluid, caused by the flow of the fluid around the body.

For a blunt body in subsonic external flow, for example the Apollo or Orion capsules during descent and landing, the wake is massively separated and behind the body is a reverse flow region where the flow is moving toward the body. This phenomenon is often observed in wind tunnel testing of aircraft, and is especially important when parachute systems are involved, because unless the parachute lines extend the canopy beyond the reverse flow region, the chute can fail to inflate and thus collapse. Parachutes deployed into wakes suffer dynamic pressure deficits which reduce their expected drag forces. High-fidelity computational fluid dynamics simulations are often undertaken to model wake flows, although such modeling has uncertainties associated with turbulence modeling (for example RANS versus LES implementations), in addition to unsteady flow effects. Example applications include rocket stage separation and aircraft store separation.