Problem: Text: 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.

Question: is head loss the same as friction loss?

OPTIONS:
- no
- yes
A: yes

Problem: Text: Mara Jade Skywalker is a fictional character in Star Wars Legends books, comic books, and computer games. She is the wife of Luke Skywalker and mother of Ben Skywalker. In the different video games, she is voiced by Heidi Shannon, Edie Mirman and Kath Soucie.

Question: was mara jade in return of the jedi?

OPTIONS:
- no
- yes
A: no

Problem: Text: Identical twins Susan Evers and Sharon McKendrick (Hayley Mills) meet at Miss Inch's Summer Camp for Girls, unaware that they are sisters. Their identical appearance initially creates rivalry, and they pull pranks on each other, culminating in the camp dance being ruined. As punishment, Miss Inch decides that they must live together in the isolated ''Serendipity'' cabin (and eat together at an ''Isolation Table'') for the remainder of the camp season. After discovering that they both come from single-parent homes, they soon realize they are twin sisters and that their parents, Mitchell ''Mitch'' Evers (Brian Keith) and Margaret ''Maggie'' McKendrick (Maureen O'Hara), divorced shortly after their birth, with each parent having custody of one of them. The twins, each eager to meet the parent she never knew, decide to switch places. Susan gives Sharon a matching haircut and has her bite her nails. They also take a crash-course getting to know each other while learning about each other's personalities and ways of life.

Question: are the twins in the parent trap the same person?

OPTIONS:
- no
- yes
A:
yes