Question

12) As shown in fig. an open-tube manometer containing water (p.-10 kg/m') and mercury (p-1.36x 10 kg/m). The height of water in the left column above the interface A is h' - 30 cm, while the height of mercury in the right column above B is h - 20 cm. The right column is open to the atmosphere Patm - 1.01 10 Pa. The pressure P in the container is: a) P-1.25x10 Pa a) P=0.56*10Pa b) P-4.29x109 Pa d) P-2.46x10* Pa Quiz ch. 14 1) As a liquid temperature increases, a) The viscosity doubles b) Its viscosity increases c) Its viscosity decreases d) Its viscosity remains unchanged 2) As a gase temperature increases a) Its viscosity increases. b) The viscosity doubles c) Its viscosity decreases. d) Its viscosity remains unchanged. 3) For a viscous fluid, a) The greater the viscosity, the larger the force required to maintain the flow. b) The greater the viscosity, the smaller the force required to maintain the flow. c) Viscosity and the force required to maintain the flow are not related. d) The decrease viscosity, the larger force required to maintain the flow. 4) In a horizontal tube with constant cross section, Bernoulli's equation can be used for a) Only non-viscous fluids b) Non viscous fluids and its pressure constant along the tube c) Both viscous and non-viscous fluids. d) Only viscous fluids

Answer 1

- Paths. ost .. . Pressure at A= Pressure at B. then It liester go l'= Patim & Sugi goh 141039. BX 0.3 P = 1:01x10 spat 1.36X10" x 98 x 0.2 - P= 1:01 x 105 Pa + 2.878104 (P= 1.247 X10S Pal