A liquid at 10◦C rises to a height of 20 mm in a 0.4 mm glass...
A liquid at 10◦C rises to a height of 20 mm in a 0.4 mm glass tube. The angle of contact is 45◦ . Determine the surface tension of the liquid if its density is 1, 200 kg/m3
Homework Answers
fluid mechanic
1. A 1.2-mm diameter tube is inserted into an unknown liquid whose density is 960kg/m3, and it is observed that the liquid rises 5-mm in the tube, making a contact angle of 15º. Determine: (i) The surface tension of the liquid; and (ii) The capillary rise of the liquid, if the liquid is kerosene with surface tension 0.028 N/m and density is 820 kg/m3.
A liquid rises to a height of 34.0 mm in a glass capillary. A second capillary...
A liquid rises to a height of 34.0 mm in a glass capillary. A second capillary with twice the diameter of the first is then test. How high will the liquid rise?
A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylindrical tube ...
A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylindrical tube that is 3 cm in length. The disks are placed in a wan technician to insert the sampling disk into the water. The tubes are then sealed in a container and taken back to the lab where the water is removed from the tube and analyzed. The tube is made of glass and contains 200 cylindrical pores 1 mm in diameter that run...
4. 5 points A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylin...
4. 5 points A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylindrical tube that is 3 cm in length. The disks are placed in a wand that allows the technician to insert the sampling disk into the water. The tubes are then sealed in a container and taken back to the lab where the water is removed from the tube and analyzed. The tube is made of glass and contains 200 cylindrical pores...
What is the capillary rise of ethanol in a glass tube with a 0.1 mm radius...
What is the capillary rise of ethanol in a glass tube with a 0.1 mm radius if the surface tension of ethanol is 0.032Jm2 and the density of ethanol is 0.71gcm3? Assume that the contact angle of ethanol in a glass tube is 0 degrees. Your answer should have two significant figures.
A glass tube of inside diameter 1.0 mm is dipped vertically into a container of mercury,...
A glass tube of inside diameter 1.0 mm is dipped vertically into a container of mercury, with its lower end 1 cm below the mercury surface. a) What must be the gauge pressure of the air in the tube to blow a hemispherical bubble at its lower end? (Answer: 1400 Pa) b) To what height will mercury rise in the tube if the air pressure in the tube is 3000 Pa below atmospheric? The contact angle is 140 degrees and...
Suppose you have a perfectly wetting glass tube (with air as the non-wetting phase), and the...
Suppose you have a perfectly wetting glass tube (with air as the non-wetting phase), and the contact angle is 0˚. Assume room temperature. (There is a table of surface tension for various temperatures in the slides.) In all these calculations, please be aware of the difference between degrees and radians, and ensure that your calculator or excel functions are set up properly. 1a. How high up a 0.12 mm diameter glass tube will capillary pressure be able to pull water...
An organic liquid is heated from 20°C to 40°C by hot water in a 1:1 pass...
An organic liquid is heated from 20°C to 40°C by hot water in a 1:1 pass shell-and- tube heat exchanger in counter-current flow. The inlet temperature of the water stream is 85oC and flows in the shell side. The organic liquid flows through a bundle of 200 tubes of outside diameter 21 mm with a wall thickness of 2 mm. The flows of the organic liquid and water are 40 kg s and 15 kg s1, respectively (a) Calculate the...
Two fluids have the same contact angle with glass. The density of fluid 1 is larger...
Two fluids have the same contact angle with glass. The density of fluid 1 is larger than the density of fluid 2 . (ρ1 = 1.3 ρ2) The surface tension of fluid 1 is larger than that of fluid 2. (γ1 = 1.81 γ2) Find the ratio h1/h2 of the heights to which a liquid will rise through capillary action in the same capillary tube.
A mercury thermometer consists of a 0.4-mm capillary tube connected to a glass bulb. The mercury...
A mercury thermometer consists of a 0.4-mm capillary tube connected to a glass bulb. The mercury rises 7.5 cm as the temperature of the thermometer increases from 35°C to 43°C. Find the volume of the thermometer bulb.
A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylindrical tube that is 3 cm in length. The disks are placed in a wan technician to insert the sampling disk into the water. The tubes are then sealed in a container and taken back to the lab where the water is removed from the tube and analyzed. The tube is made of glass and contains 200 cylindrical pores 1 mm in diameter that run...
4. 5 points A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylindrical tube that is 3 cm in length. The disks are placed in a wand that allows the technician to insert the sampling disk into the water. The tubes are then sealed in a container and taken back to the lab where the water is removed from the tube and analyzed. The tube is made of glass and contains 200 cylindrical pores...
An organic liquid is heated from 20°C to 40°C by hot water in a 1:1 pass shell-and- tube heat exchanger in counter-current flow. The inlet temperature of the water stream is 85oC and flows in the shell side. The organic liquid flows through a bundle of 200 tubes of outside diameter 21 mm with a wall thickness of 2 mm. The flows of the organic liquid and water are 40 kg s and 15 kg s1, respectively (a) Calculate the...
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