

1. A m = 0.5 kg piston slides in a lubricated cylinder at a constant velocity...
A cylinder weighs 20 kg slides in a lubricated pipe, The clearance between cylinder and the pipe in 0.025 mm. If the cylinder w observed to decelerate at a rate of 0.6 m/s2 when the speed is 6 m/s What is the viscosity of oil ? [Aus M=9.204x10 N5/13]
A block of weight W slides down an inclined plane with a constant velocity V while lubricated by a thin film of a fluid. The film contact area is A and its thickness is h. Assuming a linear velocity distribution in the film, derive an expression for the viscosity ? of the fluid. Calculate the viscosity ? of the fluid if the block mass is 6 kg, A = 35 cm, , ? = 30°, V = 20 m/s and...
Problem 10 Consider a cylinder falling inside a pipe that is filled with oil. The small space between the cylinder ant the pipe is lubricated with an oil film that has viscosity u. Pipe Derive a formula for the steady rate of descent of a cylinder with weight W, diameter d, and length l sliding inside a vertical smooth pipe that has inside diameter D. Assume that the cylinder is concentric with the pipe as it falls. Use the general...
As shown in the figure below, 0.5 kg of water is contained within a piston-cylinder assembly at 100°C. The piston has a mass of 90 kg and is free to move smoothly in the cylinder. The local atmospheric pressure and acceleration of gravity are 100 kPa and 9.81 m/s2, respectively. g=9.81 m/s2 Patm = 100 kPa Piston Water at 100°C A = 0.01 m2 For the water, determine the pressure, in kPa, and volume, in cm?
A board 1-m by 1-m that weights 25 N slides down an inclined ramp (slope = 20 degree) with a constant velocity of 2.0 cm/s. The board is separated from the ramp by a thin film of oil with a viscosity of 0.05 N-s/m^2. Determine the space (mm) between the board and the ramp.
2. The kinetic viscosity of a hydraulic oil is 110cP. The oil is flowing in a 20-mm diameter commercial steel pipe with the length of 45-m. If the velocity of oil is 4-m/s and specific gravity is 0.9 find the following a. Reynolds number b. Friction factor c. Head losses.
2. The kinetic viscosity of a hydraulic oil is 110cP. The oil is flowing in a 20-mm diameter commercial steel pipe with the length of 45-m. If the velocity of...
need help with these 3
questions im stuck!
A closed tank having a volume of 62 L is filled with 0.1 kg of a gas. A pressure gauge attached to the tank reads 270 kPa when the gas temperature is 20°C. Assuming ideal gas behaviour, the gas in the tank is most likely: cross out Select one: O a. Air; O b. Carbon dioxide; c. Oxygen; cross out cross out d. None of the above cross out An open (to...
Problem #1 A long solid slab is moving at a speed of 1 m/s over three identical lubricated pads as shown in the figure below. The pads have a linear profile, and the gap width, h between the pad and the moving slab decreases from 3 mm at its widest to 1 mm at the other end. The length of each pad is 5 cm and its width is 10 cm. If the lubricant has a dynamic viscosity of 0.65...
A piston/cylinder arrangement with an cross sectional area of 1 mạ contains carbon dioxide at 200 kPa and 290 K. The cylinder has a thick piston that initially held by a pin as shown in Figure 1. The metal piston has a density of 8000 kg/mº, standard acceleration of gravity, &c is 9.81 m/s and the atmospheric pressure is 101 kPa. The pin is now removed, allowing the piston to move and after a while the gas returns to 290...
1. a. A fluid of density 1400 kg/mand viscosity of 0.9 kg/m.s flows through an 80 mm diameter pipe with a velocity of 5 m/s. What type of flow exists in the pipe? Justify your answer. (2 marks) b. A shaft 70 mm in diameter is being pushed at a speed of 400 mm/s through a bearing sleeve 70.2 mm in diameter and 250 mm long. The clearance, assumed uniform, is filled with oil with kinematic viscosity v = 0.005...