Estimate the height which water will rise in a capillary tube 12mm diameter. Use surface tension = 0.0728 N/m and gamma = 9810 N/m^3 Ans. No Capillary Action
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Estimate the height which water will rise in a capillary tube 12mm diameter. Use surface tension = 0.0728 N/m and gamma = 9810 N/m^3
Ans. No Capillary Action
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- Find the capillary rise in a tube for a water glass interface (teta) = 0° if the tube radius is 1mm and the density is 1000 kg/m³. Surface tension of water is 0.0728 N/m.Ex.1 Ans. A glass tube 0.25 mm in diameter contains a mercury column with water above the mercury. The temperature is 20°C at which the surface tension of mercury in contact with water is 0.037 kg()/m. What will be the capillary depression of the mercury? Take angle of contact 0= 130°. 3.02 cmAssuming that pressure will increase at a uniform rate and there is no damping of the pressure wave. Water from a reservoir that flows through a 650mm pipe at 1.8m/s is completely stopped by a closure of a 160 m valve from the reservoir. The thickness of the pipe is 25mm, bulk modulus of water is 2.2x10⁹ Pa and E of steel is 1.4x10¹¹ Pa. Determine the following: a. Celerity of the pressure wave b. Equivalent bulk modulus of water c. Pressure on the pipe after closure of the valve d. Time required to avoid water hammer e. Water hammer pressure of the velocity will decrease to 1.2m/s f. Maximum permissible discharge after the outlet valve closure. ANSWER: d) t = 0.256 sec. e) Ph=pCAV = 749.8476 kPa f) Q = AV = 0.597 m³/s a) C = 1249.746m/s b) k' = 1.562x10⁹ Pa c) Ph=pCV = 2249.5428 kPa
- 7. What is the pressure value (PA) needed to achieve equilibrium for the figure shown (kPa)? a. 0.59 c. 1.02 b. 1.02 d. None of all these PA S.G=0.87 30 120 mm7. The diameters of a small piston and a large piston of a hydraulic jack are force of 60 N is applied on the small piston. Find the load lifted by the large piston, when : (a) the pistons at the same level, and (b) small piston is 20 cm above the large piston. The density of the liquid in the jack is given as 1000 . respectively. A kg [Ans. (a) 1500 N, (b) 1520.5 NJ 8. Determine the gauge and absolute pressure at a point which is 2.0 m below the free surface of water. Take [Ans. 1.962 N/em (gauge), 12.066 N/cm2 (abs.)] m' atmospheric pressure as 10.1043 Nicm. 9. A simple manometer is used to measure the pressure of oil (sp. gr, 0.8) flowing in a pipe line. Its right limb is open to the atmosphere and left limb is connected to the pipe. The centre of the pipe is 9 cm below the level of mercury (sp. gr. 13.6) in the right limb. If the difference of mercury level in the two limbs is 15 [Ans. 12.058 N/em²| cm, determine the absolute pressure of the oil in the pipe in N/cm. 10. A simple…When a 2-mm-diameter tube is inserted into a liquid in an open tank, the liquid is observed to rise 8 mm above the free surface of the liquid. The contact angle between the liquid and the tube is zero, and the specific weight of the liquid is 1.2 × 104 N/m³. Determine the value of the surface tension for this liquid. J = i N/m
- Find the capillary rise in a tube shown for a water- glass interface. ∅=0 if the tube radius is 1mm and the density is 1000kg/m³. Surface tension of water is 0.0728 N/m.COMPUTE THE CAPILLARY RISE IN mm. OF PURE WATER AT 10^0 C EXPECTED IN A 0.8 mm θ TUBEA welded steel cylindrical drum made of a 10-mm plate has an internal diameter of 14 m. Compute the change in diameter that would be caused by an internal pressure of 14 MPa. Assume that Poisson's ratio is 0.30 and E = 200 GPa.
- (a) Determine the height water at 70F will rise due to capillary action in a clean, 1/4-in.-diameter tube. (b) What will be the height if the diameter is reduced to 0.01 in.? At this temperature, water = 0.00497 lb/ft and water = 62.3 lb/ft3 . Use = 0degrees(4) Consider that we have a horizentral pipe, like shown in the sketh, which is carrying in this case, cooling water at 10 °C. The elevation of the big tank of cooling water is 100 m, the elevation of the center line of the pipe is 20 m, the length of the pipe is 2000 m. Head loss in the pipe is 0. 07 L / D) V? H. D=20 cm, the rate of flow is 0.0 a=1 ase calculate the 2g pressure in the pipe. Elevation = 100 m Elevation = 20 m L=2000 m %3D II ||The pressure in a gas tank is 2.75 atm. Compute the pressure head in meters of water. The unit weight of a liquid is variable and is given by the relation y = 10 + 0.5h. Determine the gauge pressure in kPa at a depth of 5m. %3D