Air (density ) flows through a duct

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Fluids · Fluids

Problem

Air (density

1.2\,\text{kg m}^{-3}

) flows through a duct. A stagnation tube and the duct wall are connected to a manometer containing water (density

1000\,\text{kg m}^{-3}

). The water levels differ by

5.0\,\text{cm}

. Determine the speed of air in the duct. (Use

g = 9.8\,\text{m s}^{-2}

.) (a)

21\,\text{m s}^{-1}

(b)

14\,\text{m s}^{-1}

(c)

29\,\text{m s}^{-1}

(d)

42\,\text{m s}^{-1}