2. A 25-mm diameter shaft with density 7,870 kg/m³ is pulled through a cylindrical bore as shown. Oil with a kinematic viscosity of 8.2 104 m²/s and SG-0.89 fills the 0.3-mm gap between the shaft and the bore. Find the magnitude of the force P required to pull the rod through the bore with a constant speed of 2.5 m/s. 0.5 m 15°

2. A 25-mm diameter shaft with density 7,870 kg/m³ is pulled through a cylindrical bore as shown. Oil with a kinematic viscosity of 8.2 104 m²/s and SG-0.89 fills the 0.3-mm gap between the shaft and the bore. Find the magnitude of the force P required to pull the rod through the bore with a constant speed of 2.5 m/s. 0.5 m 15°

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

See similar textbooks

Similar questions

To determine the shear stress of oil, two horizontal plates are placed 15 cm apart, the space between them is filled with the oil of viscosity 15 poise. If the upper plate is moving with velocity 2,000 mm/s, find the shear stress (τ).
A shaft 70-mm in diameter is being pushed at a speed of 400mm/s through a bearing sleeve 70.2-mm in diameter and 250mm long. The clearance is filled with oil with a kinematic viscosity of v = 0.005 ?2/? and SG=0.9. Find the frictional resistance exerted by the oil on the shaft in Newtons (N). And when the shaft is fixed axially and rotated inside the sleeve at 2000 rpm, determine the resisting torque exerted by the oil and the power required to rotate the shaft in kiloWatts (kW).
The velocity through the centre-line of a 150 mm diameter pipe conveying oil under laminar flow conditions is 3 m/s. The viscosity of the oil is 1.2 poises and its density if 900 kg/m3 . Confirm that the flow is laminar and determine (a) the quantity flowing in dm³/s, and (b) the shear stress in the oil at the pipe wall in N/m²
A shaft 70-mm in diameter is being pushed at a speed of 400mm/s through a bearing sleeve 70.2-mm in diameter and 250mm long. The clearance is filled with oil with a kinematic viscosity of v = 0.005 ?2/? and SG=0.9. Find the frictional resistance exerted by the oil on the shaft in Newtons (N).
The velocity distribution for the flow of oil with dynamic viscosity of 0.05 Pa-s is given by u(y)=200y(0.1−y)u(y)=200y(0.1−y) where y is in meters. What is the shear stress at the bottom boundary in Pa? see picture
An oil film of thickness 1.5 mm is used for lubrication between asquare plate of size 0.9 m × 0.9 m and an inclined plane having anangle of inclination 200. The weight of the square plate is 392.4 N andit slides down the plane with a uniform velocity of 0.2 m/s. Find thedynamic viscosity of the oil
An open tank 5m long, 2m deep and 3 m wide contains oil of relative density 0.9 to a depth of 0.9 m. If the tank is accelerated along its length on a horizontal track at a constant value of 3 m/s2 , determine: (i) The new positon of the oil surface. (ii) The pressures at the bottom of the tank at the front and rear edges. (iii) The amount of spill if the tank is given a horizontal acceleration of 4.5 m/s2 instead of 3 m/s2 .
The density of water is 1000 kg/m3, and it has a viscosity of 0.001 kg/(m*s). What is the Reynolds number for a flow with speed = 0.2 m/s and depth = 0.1 m?
Honey at 1L/min is flowing in a capillary viscometer 2cm in diameterand 50cm long. If the pressure drops is 40kPa, determine its viscosity
A piston with a diameter of 6 cm and a length of L = 13 cm rotates at n = 105 rpm in a cylinder of 6.04 cm in diameter as shown in the figure. Since the dynamic viscosity of the oil between the piston and the cylinder is 1.075 kg · sec · m-2, calculate the moment value that should be applied to the piston rod. M=?
Assume an ideal fluid with mass density of 900kg/cu.m. The pressure and velocity at section 1 are 100kPa and 10 m/s, respectively. The velocity at section 2is 20 m/s. (a) Determine the reading on the manometer.(b) If the downstream piezometer was replaced with aPitot tube, what would be the manometer reading?Comment on the practicality of these arrangements.
steel tape 0.5 mm thick and 20 mm wide is pulled by a force F through a slit opening 1.5 mm and length 15 mm. Considering that the tape is centered on the slit, that lubricating oil of viscosity µ = 0.4 Nm-2s? fills the gap spaces not occupied by the tape and that the maximum tape speed is 10 m/s, calculate the maximum force F. Expected Answer: Maximum Force = 4.8N