IN: Is it true that is head loss the same as friction loss?

In fluid flow, friction loss (or skin friction) is the loss of pressure or ''head'' that occurs in pipe or duct flow due to the effect of the fluid's viscosity near the surface of the pipe or duct. In mechanical systems such as internal combustion engines, the term refers to the power lost in overcoming the friction between two moving surfaces, a different phenomenon.

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OUT: yes

IN: Is it true that has any nfl team ever won 3 superbowls in a row?

The Pittsburgh Steelers (6--2) have won the most Super Bowls with six championships, while the New England Patriots (5--5), the Dallas Cowboys (5--3), and the San Francisco 49ers (5--1) have five wins. New England has the most Super Bowl appearances with ten, while the Buffalo Bills (0--4) have the most consecutive appearances with four (all losses) from 1990 to 1993. The Miami Dolphins are the only other team to have at least three consecutive appearances: 1972--1974. The Denver Broncos (3--5) and Patriots have each lost a record five Super Bowls. The Minnesota Vikings (0--4) and the Bills have lost four. The record for consecutive wins is two and is shared by seven franchises: the Green Bay Packers (1966--1967), the Miami Dolphins (1972--1973), the Pittsburgh Steelers (1974--1975 and 1978--1979, the only team to accomplish this feat twice), the San Francisco 49ers (1988--1989), the Dallas Cowboys (1992--1993), the Denver Broncos (1997--1998), and the New England Patriots (2003--2004). Among those, Dallas (1992--1993; 1995) and New England (2001; 2003--2004) are the only teams to win three out of four consecutive Super Bowls. The 1972 Dolphins capped off the only perfect season in NFL history with their victory in Super Bowl VII. The only team with multiple Super Bowl appearances and no losses is the Baltimore Ravens, who in winning Super Bowl XLVII defeated and replaced the 49ers in that position. Four current NFL teams have never appeared in a Super Bowl, including franchise relocations and renaming: the Cleveland Browns, Detroit Lions, Jacksonville Jaguars, and Houston Texans, though both the Browns (1964) and Lions (1957) had won NFL championship games prior to the creation of the Super Bowl.

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OUT: no

IN: Is it true that is there an attack on titan season 2?

A second season aired from April 1 to June 17, 2017 on MBS and other television networks. Funimation and Crunchyroll streamed the second season on their respective websites, while Adult Swim aired a dubbed version. The opening theme song is ''Opfert eure Herzen!'' (!, Shinzo o Sasageyo!, lit. ''Dedicate Your Hearts!'') by Linked Horizon and the ending theme song is ''Yugure no Tori'' () by Shinsei Kamattechan.

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OUT: yes

IN: Is it true that are oakley and ray ban owned by the same company?

As a vertically integrated company, Luxottica designs, manufactures, distributes and retails its eyewear brands, including LensCrafters, Sunglass Hut, Apex by Sunglass Hut, Pearle Vision, Sears Optical, Target Optical, Eyemed vision care plan, and Glasses.com. Its best known brands are Ray-Ban, Persol, and Oakley.

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OUT:
yes