5. A flat plate is sliding at aconstant velocity of 5 m/s on a large horizontal table. A thin layer of oil ( ofabsolute viscosity 0.4 N.s/m2) separates the plate from the table. To limit the shear stress in the oillayer to 1 kpa, the thickness of the oil film (mm) should be most nearly toa) 0.2b) 20c) 1.6d) 1.85

Given vilocity = 5m/s absolute viscosity = 0,4Ns/m2 and shear stess = 1kpa

5. A flat plate is sliding at aconstant velocity of 5 m/s on a large horizontal table. A thin layer of oil ( of absolute viscosity = 0.4 N.s/m²) separates the plate from the table. To limit the shear stress in the oil layer to 1 kpa, the thickness of the oil film (mm) should be most nearly to a) 0.2 b) 20 c) 1.6 d) 1.85

5. A flat plate is sliding at aconstant velocity of 5 m/s on a large horizontal table. A thin layer of oil ( of absolute viscosity = 0.4 N.s/m²) separates the plate from the table. To limit the shear stress in the oil layer to 1 kpa, the thickness of the oil film (mm) should be most nearly to a) 0.2 b) 20 c) 1.6 d) 1.85

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter15: Braced Cuts

Section: Chapter Questions

Problem 15.5P

See similar textbooks

Similar questions

A clay layer 12ft thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand is located 10ft below the surface of a lake. The saturated unit weight of the sand is 125 lb /ft³ and of the clay layer is 117 lb /ft³. 1. Compute the total vertical pressure at the mid height of the clay layer. a. 4390psf b. 4577 psf c. 4963psf d. 4800psf 2. Compute the pore water pressure at the mid height of the clay a. 2659psf b.2620 psf c. 2668 psf d. 2680psf 3. Compute the effective vertical pressure at the mid height of the clay a. 1731psf b.1956 psf c. 2295psf d. 1273psf
Q2:Find the thickness of a capillary zone of a silty clay soil layer above water table where the pore water pressure was 100 kN/m² and the tension force of the soil was 0.001 kN at adhesion angle is 8º.
A soil along a horizontal plane at a depth of 4 m in a deposit of sand having the following properties: Angle of internal friction, ∅ = 35° ; Dry unit weight, yd = 17 kN/m3 ; Specific gravity, Gs =2.7. Assume the ground water table is at a depth of 2.5 m from the ground surface. Find the change in shear strength in kPa when the water table rises to the ground surface.
Determine the moment magnitude in a place where the length of the rupture was 550km, the slip was 2m and the width of the rupture was 700m. Use the usual shear modulus of the crust. a) Mw = ?
Air flowing at 40 kPa, 210 K, and a Mach number of 3.4 impinges on a two-dimensional wedge of half-angle 8°. Determine the two possible oblique shock angles, ?weak and ?strong, that could be formed by this wedge. For each case, calculate the pressure and Mach number downstream of the oblique shock.
A 10-m-thick layer of stiff saturated clay is underlain by a layer of sand (Figure 9.28). The sand is under artesian pressure. A 5.75-m-deep cut is made in the clay. Determine the factor of safety against heaving at point A.
A 17-meter-thick soil has a water table 4m below the water surface. The soil has a void of 0.46 and a specific gravity of 2.62. Above the water table, the soil has a degree saturation equal to 40.85%. Direct shear test conducted on the soil shows that the angle of internal friction of 24.99% and cohesion of 16.06 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 9m below the ground surface?
Regarding geotextiles used in separation, what is the required burst pressure of a geotextile supporting 75-mm maximum-size stone and heavy trucks with a tire inflation pressure of 1000-kPa? Use (where p’ = the pressure at the geotextile interface and p = the inflation pressure); a cumulative reduction factor = 2.0; and a factor of safety = 2.0.
A plate moves 10 cm/s to the right is 0.5 cm above a stagnant wall. The fluid bet. the plate and the wall has a viscosity of 1.8 cP. Compute the shear rate.
A layer of sand 5 meters deep overlies a thick bed of clay. calculate the vertical, horizontal, effective stresses and pore water pressure on horizontal planes to a depth of 9 meters below the ground surface in the following cases: a. If the water table is at the ground level. b. If the water table is at 2 meters below ground level and the sand above is dry. c. If the water table is at the top of the clay and the sand dry. For Sand: ysat at = 20.9kN / (m ^ 3); vdry = 17.4kN / (m ^ 3) For Clay : ysat t = 17.8kN / (m ^ 3) The coefficient of lateral earth pressure is 0.5.
A 17-m thick soil has water table 5 m. below the ground surface. The soil has a void ratio of 0.41 and specific gravity of 2.61. Above the water table, the soil has a degree of saturation equal to 48.54%. Direct shear test conducted on the soil shows that the an angle of internal friction of 21.16° and cohesion of 17.58 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 9 m. below the ground surface? Round off to two decimal places. Answer: 72.75
A 17-m thick soil has water table 5 m. below the ground surface. The soil has a void ratio of 0.41 and specific gravity of 2.61. Above the water table, the soil has a degree of saturation equal to 48.54%. Direct shear test conducted on the soil shows that the an angle of internal friction of 21.16° and cohesion of 17.58 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 9 m. below the ground surface? Round off to two decimal places.