Physics

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}

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

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

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