A rotameter with float shape type "B" (see figure below) has a tube of 0.3 m long. The internal diameter of the rotameter is 25 mm at the top and 20 mm at the bottom. The diameter of the float is 20 mm, its density is 5100 kg/m³ and its volume is 5.0 cm³. What is the mass flow rate of water (at 25 °C)when the float position is 0.2 m from the bottom of the tube?

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7.11.* A nozzle is bolted onto a pipe by the flanged joint shown in Fig. 7.29. The flowing fluid is water. The cross- sectional area perpendicular to the flow at point 1 is 12 in² and at point 2 is 3 in². At point 2 the flow is open to the atmosphere. The pressure at point 1 ≈ 40 psig. (a) Estimate the velocity and mass flow rate by B.E. (b) What is the force tending to tear the nozzle off the pipe? Water Pipe #O FIGURE 7.29 Nozzle, bolted to pipe. Nozzle

2C.4 Falling-cylinder viscometer (see Fig. 2C.4). A falling-cylinder viscometer consists of a long vertical cylindrical container (radius R), capped at both ends, with a solid cylindrical slug (ra- dius KR). The slug is equipped with fins so that its axis is coincident with that of the tube. One can observe the rate of descent of the slug in the cylindrical container when the lat- ter is filled with fluid. Find an equation that gives the viscosity of the fluid in terms of the ter- minal velocity of the slug and the various geometric quantities shown in the figure. Cylindrical slug descends- with speed t -XR- Cylindrical container filled with fluid Fig. 2C.4 A falling-cylinder viscom- eter with a tightly fitting solid cylin- der moving vertically. The cylinder is usually equipped with fins to maintain centering within the tube. The fluid completely fills the tube, and the top and bottom are closed. (a) Show that the velocity distribution in the annular slit is given by (1-)-(1+¹) In…

The laminar flow of water in a small pipe is given by where R = 0.5 cm is the pipe radius, and Umax = 20 cm/s. Assume the temperature is 15°C. (a) Find the wall shear stress. (b) Find the pressure drop in a 10 cm length of the pipe. (c) Verify that the flow is indeed laminar.  

Q4- Water flows at a velocity of 1 m/s over a plane surface 0.6 m wide and 1 m long. Calculate the total drag force acting on the surface if the transition from streamline to turbulent flow in the boundary layer occurs when the Reynolds group Re, = 105 and Taking == 1 mN s/m² = 10-³ Ns/m².

As shown in the accompanying figure, a thin flat plate rests on top of a film of ambient temperature (i.e. 20 °C) water. When a small force F is applied to this plate, the velocity profile within the water film can be described as vx = 40y-800y² where y is the distance (m) from the bottom stationary plate. a. Show that velocity equation satisfies the 'no-slip' conditions that must exist for both the top moving plate and bottom stationary plate. b. Calculate the magnitude of the shear stress (in Pa) that is acting on the top plate 10 mm 0.32 m/s -X

express in 4 decimal places    ans asap

(3) We are offered some pipes made of a new kind of plastic. To test their roughness, we pump water through a 0.0762 m pipe made of this material at an average velocity of 12.19 m/s. The observed Fanning friction factor is 0.0032. Estimate the absolute roughness of this plastic.

While performing a leak off test the surface pressure at leak off was 940 psi. The casing shoe was at a true vertical depth of 5010 ft and a mud weight of 10.2 ppg was used to conduct the test.