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47 Two chambers with the same luid at their base are separated by a piston whose weight is 25 N, a shown in Fig P3-47. Calculate the gage peessures in chambers A and B.

47 Two chambers with the same luid at their base are separated by a piston whose weight is 25 N, a shown in Fig P3-47. Calculate the gage peessures in chambers A and B.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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3-47 Two chambers with the same fluid at their base are separated by a pistan whose weight is 25 N, as shown in Fig. P3-47. Calculate the gage pressures in chambers A and B. FIGURE P3-43 Piston 344E Twa eil tanks are connected to each other through a manometer. If the difference between the mercury levels in Air p Air Oil Oil 50 em 10 in 30 cm 25 cm E. 30 cm 32 in Water CMereury 50 c FIGURE P3-44E FIGURE P3-47 108 FLUID MECHANICS 3-50 Consider the system shown in Fig. P3-50. If a change of 0.7 kPa in the pressure of air causes the beine mercury interface in the right column to drop hy 5 mm in the hrine level in the right column while the pressure in the brine pipe remains coustant, determine the ratio of AJA, 3-48 Consider a double-fluid manometer attached to an air pipe shown in Fig. P3 48. If the specific gravity of ene fluid is 13.55, determine the specific gravity of the other fluid for the indicated absolute pressure of air. Take the atmospheric pressure to be 100 kPa. Answer: 5.0 Air Air (P-76 kPa 40 cm Brine pipe SG-1.1 SG, Water 22 cm Aren A Area, A, Meacur sa, - 13.55 FIGURE P3-48 FIGURE P3-50 3-49 The pressure diflerence between an oil pipe and water nipe is measured by a double-fluid manometer, as shewn in Fig P3 49. For the given fluid heights and specifie gravities, calculate the pressure difference AP = P, - P 3-51 Twe water tanks are connected to each ather through a mercury manometer with inclined tubes, as shewn in Fig. P3-51. If the pressure difference between the twe tanks is 20 kPa, calculate a and o. Waner Gilyemin Waer SG- 1.26 SG =10 Oil SG -C.KK 26. cm a EWater 6l em 10 cm Merury 15 cm FIGURE P3-51 20 cm 3-52 A multifluid container is connected to a U-tube, as Mercury shown in Fig. P3-52. For the given specific gravities and fluid column heights, determine the gage pressure at A. Also determine the height of a mercury column that would create the same pressure at A. Answes: D471 KPa, 0.353 cm SG- 13.5 FIGURE P3-49 109 CHAPTER 3 sure center if (a) the car is well-sealed and it contains air at atmospheric pressure and (b) the car is filled with water. 3-61E A long, solid cylinder of radius 2 ft hinged at point A is used as an automatic gate, as shown in Fig. P3-61E. When the water level reaches 15 t, the cylindrical gate opens by turning about the hinge at point A. Determine (a) the hydrestatic force acting on the eylinder and its line of action when the gate opens and (b) the weight of the cylinder per ft length of the cylinder 70 cm Oil SG=090 30 cm Waner 90 cm Glycerin SG- 1.26 20 cm 15 em 15 FIGURE P3-52 Fluid Statics: Hydrostatic Forces on Plane
Transcribed Image Text:3-47 Two chambers with the same fluid at their base are separated by a pistan whose weight is 25 N, as shown in Fig. P3-47. Calculate the gage pressures in chambers A and B. FIGURE P3-43 Piston 344E Twa eil tanks are connected to each other through a manometer. If the difference between the mercury levels in Air p Air Oil Oil 50 em 10 in 30 cm 25 cm E. 30 cm 32 in Water CMereury 50 c FIGURE P3-44E FIGURE P3-47 108 FLUID MECHANICS 3-50 Consider the system shown in Fig. P3-50. If a change of 0.7 kPa in the pressure of air causes the beine mercury interface in the right column to drop hy 5 mm in the hrine level in the right column while the pressure in the brine pipe remains coustant, determine the ratio of AJA, 3-48 Consider a double-fluid manometer attached to an air pipe shown in Fig. P3 48. If the specific gravity of ene fluid is 13.55, determine the specific gravity of the other fluid for the indicated absolute pressure of air. Take the atmospheric pressure to be 100 kPa. Answer: 5.0 Air Air (P-76 kPa 40 cm Brine pipe SG-1.1 SG, Water 22 cm Aren A Area, A, Meacur sa, - 13.55 FIGURE P3-48 FIGURE P3-50 3-49 The pressure diflerence between an oil pipe and water nipe is measured by a double-fluid manometer, as shewn in Fig P3 49. For the given fluid heights and specifie gravities, calculate the pressure difference AP = P, - P 3-51 Twe water tanks are connected to each ather through a mercury manometer with inclined tubes, as shewn in Fig. P3-51. If the pressure difference between the twe tanks is 20 kPa, calculate a and o. Waner Gilyemin Waer SG- 1.26 SG =10 Oil SG -C.KK 26. cm a EWater 6l em 10 cm Merury 15 cm FIGURE P3-51 20 cm 3-52 A multifluid container is connected to a U-tube, as Mercury shown in Fig. P3-52. For the given specific gravities and fluid column heights, determine the gage pressure at A. Also determine the height of a mercury column that would create the same pressure at A. Answes: D471 KPa, 0.353 cm SG- 13.5 FIGURE P3-49 109 CHAPTER 3 sure center if (a) the car is well-sealed and it contains air at atmospheric pressure and (b) the car is filled with water. 3-61E A long, solid cylinder of radius 2 ft hinged at point A is used as an automatic gate, as shown in Fig. P3-61E. When the water level reaches 15 t, the cylindrical gate opens by turning about the hinge at point A. Determine (a) the hydrestatic force acting on the eylinder and its line of action when the gate opens and (b) the weight of the cylinder per ft length of the cylinder 70 cm Oil SG=090 30 cm Waner 90 cm Glycerin SG- 1.26 20 cm 15 em 15 FIGURE P3-52 Fluid Statics: Hydrostatic Forces on Plane
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