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3-43 The 500-kg load on the hydraulic lift shown in Fig. P3-43 is to be raised by pouring oil (p = 780 kg/m') into a thin tube. Determine how high h should be in order to hegin to raise the weight.

3-43 The 500-kg load on the hydraulic lift shown in Fig. P3-43 is to be raised by pouring oil (p = 780 kg/m') into a thin tube. Determine how high h should be in order to hegin to raise the weight.

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
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SG = 11 arment, as sIo 1:0Y IT0 unknown de 3G thes 00000 zain IQ this effect. Based on the final fluid heights shown on the fig- ure, determine the density of the fluid added. Assume the liq- uid does not mix with water. Mereury FIGURE P3-36 2_54498806432... > 107 CHAPTER 3 the two arms is 32 in, determine the pressure difference between the two tanks. The densities of oil and mercury are 45 Ibm/ft' and 848 Ibm/ft', respectively. Unknown liquid 3-45 Pressure is often given in terms of a liquid column and is expressed as "pressure head." Express the standard atmospheric pressure in terms of (a) mercury (SG - 13.6), (b) water (SG = 1.0), and (c) glycerin (SG = 1.26) columns. Explain why we usually use mercury in manometers. 95 cm WATER 3-46 A simple experiment has long been used to demon- strate how negative pressure prevents water from being spilled out of an inverted glass. A glass that is fully filled by water and covered with a thin paper is inverted, as shown in Fig. P3-46. Determine the pressure at the bottom of the glass, and explain why water does not fall out. 50 cm FIGURE P3-42 3-43 The 500-kg load on the hydraulic lift shown in Fig. P3-43 is to be raised by pouring oil (p = 780 kg/m') into a thin tube. Determine how high h should be in order to begin to raise the weight. Glass 10 cm Water LOAD 500 kg A piece of paper 1.2 m I cm FIGURE P3-46 3-47 Two chambers with the same fluid at their base are separated by a piston whose weight is 25 N, as shown in Fig. P3-47. Calculate the gage pressures in chambers A and B. FIGURE P3-43 Piston 3-44E Two oil tanks are connected to each other through a manometer. If the difference between the mercury levels in B Air Air Oil Oil 50 cm 10 in 30 cm 25 cm 30 cm 32 in Water 90 ст Mercury FIGURE P3-44E FIGURE P3-47 108 FLUID MECHANICS 8 Consider a double-fluid manometer attached to an air shown in Fig. P3-48, If the specific gravity of one fluid 3.55, determine the specific gravity of the other fluid for indicated absolute pressure of air. Take the atmospheric 3-50 Consider the system shown in Fig. P3-50. If a change of 0.7 kPa in the pressure of air causes the brine-mercury interface in the right column to drop by 5 mm in the brine level in the right column while the pressure in the brine pipe remains constant, determine the ratio of AJA,. sure to be 100 kPa. Answer: 5.0 Air Air (P- 76 kPa 40 cm Brine pipe SG =11 SG Water 22 cm Area, A
Transcribed Image Text:SG = 11 arment, as sIo 1:0Y IT0 unknown de 3G thes 00000 zain IQ this effect. Based on the final fluid heights shown on the fig- ure, determine the density of the fluid added. Assume the liq- uid does not mix with water. Mereury FIGURE P3-36 2_54498806432... > 107 CHAPTER 3 the two arms is 32 in, determine the pressure difference between the two tanks. The densities of oil and mercury are 45 Ibm/ft' and 848 Ibm/ft', respectively. Unknown liquid 3-45 Pressure is often given in terms of a liquid column and is expressed as "pressure head." Express the standard atmospheric pressure in terms of (a) mercury (SG - 13.6), (b) water (SG = 1.0), and (c) glycerin (SG = 1.26) columns. Explain why we usually use mercury in manometers. 95 cm WATER 3-46 A simple experiment has long been used to demon- strate how negative pressure prevents water from being spilled out of an inverted glass. A glass that is fully filled by water and covered with a thin paper is inverted, as shown in Fig. P3-46. Determine the pressure at the bottom of the glass, and explain why water does not fall out. 50 cm FIGURE P3-42 3-43 The 500-kg load on the hydraulic lift shown in Fig. P3-43 is to be raised by pouring oil (p = 780 kg/m') into a thin tube. Determine how high h should be in order to begin to raise the weight. Glass 10 cm Water LOAD 500 kg A piece of paper 1.2 m I cm FIGURE P3-46 3-47 Two chambers with the same fluid at their base are separated by a piston whose weight is 25 N, as shown in Fig. P3-47. Calculate the gage pressures in chambers A and B. FIGURE P3-43 Piston 3-44E Two oil tanks are connected to each other through a manometer. If the difference between the mercury levels in B Air Air Oil Oil 50 cm 10 in 30 cm 25 cm 30 cm 32 in Water 90 ст Mercury FIGURE P3-44E FIGURE P3-47 108 FLUID MECHANICS 8 Consider a double-fluid manometer attached to an air shown in Fig. P3-48, If the specific gravity of one fluid 3.55, determine the specific gravity of the other fluid for indicated absolute pressure of air. Take the atmospheric 3-50 Consider the system shown in Fig. P3-50. If a change of 0.7 kPa in the pressure of air causes the brine-mercury interface in the right column to drop by 5 mm in the brine level in the right column while the pressure in the brine pipe remains constant, determine the ratio of AJA,. sure to be 100 kPa. Answer: 5.0 Air Air (P- 76 kPa 40 cm Brine pipe SG =11 SG Water 22 cm Area, A
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