Question

In: Mechanical Engineering

A 1-mm diameter sphere (density=7900 kg/m3) is dropped into a tank of oil (density=900 kg/m3). The...

A 1-mm diameter sphere (density=7900 kg/m3) is dropped into a tank of oil (density=900 kg/m3). The sphere develops a terminal speed of 0.25 cm/s, what is the oil's viscosity? You may assume a small Reynolds number. Show your work.

Solutions

Expert Solution


Related Solutions

A siphon having 50 mm diameter draws Oil with γoil = 8.03 kN/m3 from a tank....
A siphon having 50 mm diameter draws Oil with γoil = 8.03 kN/m3 from a tank. Calculate the discharge and pressure at point B, assuming that head loss from section A to section B is 1.50 m, and section B to section C is 2.40 m. End of the pipe is open to the atmosphere.
A packed bed of uniform spherical particles of diameter, d= 2.5 mm, density ρs= 4000 kg/m3...
A packed bed of uniform spherical particles of diameter, d= 2.5 mm, density ρs= 4000 kg/m3 , and voidage e= 0.45 is fluidised by means of a liquid of viscosity μ= 1 mN s/m2 and density ρ= 900 kg/m3 . (a) Starting from Carman’s and Ergun’s equations reported in the attached equations sheet, derive the corresponding expressions for the minimum fluidising velocity, umf, for both equations and explain their meaning.
1. A large open tank contains fresh water of constant density (p = 1000 kg/m3). a)...
1. A large open tank contains fresh water of constant density (p = 1000 kg/m3). a) Construct an algebraic expression for the absolute pressure (P) at a specific depth below the surface of the water (y) in terms of gravitational acceleration (g), the depth of water (y), and the density of water (ρ).
Say the density of air is 1.23 kg/m3 and the density of helium is 0.164 kg/m3...
Say the density of air is 1.23 kg/m3 and the density of helium is 0.164 kg/m3 when both are at STP. Let's model a balloon as a sphere of radius 0.12 m, with mass 2 g. 1) What is the mass of the helium that would fill a single balloon? 2) What is the buoyant force on a single balloon? 3) What is the net force on a single balloon? 4) If we attach 0.5 m of string (properties: 800...
Approximately spherical particles of diameter 150? and density 2650 kg/m3 settle through a liquid of density...
Approximately spherical particles of diameter 150? and density 2650 kg/m3 settle through a liquid of density 1097 kg/m3 and dynamic viscosity 3.8 mPa s. The volume fraction of particles is 30% in a container of internal diameter 2 cm Calculate: a)The absolute settling velocity that is apparent to the stationary observer in the lab frame. b)The slip velocity (Us) between solid and liquid phases. c) The superficial velocity of the particles in the lab frame.
A tetherball set has a ball with mass 0.411 kg and a nylon string with diameter 2.50 mm, Young's modulus 4.00 GPa, and density 1150 kg/m3.
A tetherball set has a ball with mass 0.411 kg and a nylon string with diameter 2.50 mm, Young's modulus 4.00 GPa, and density 1150 kg/m3. The nylon string has a length of 2.200 m when the ball is at rest (hanging straight down). While playing tetherball, Monty hits the ball around the pole so it moves in a horizontal circle with the string at an angle of 65.0° to the pole. (a) How much does the string stretch compared...
A bubble is sphere with 10 mm radius and a density of 1.0 kg/m^3. This goes...
A bubble is sphere with 10 mm radius and a density of 1.0 kg/m^3. This goes up in a glass of water which has Pwater=0.95 g/cm^3. It starts at the bottom of a glass which is 10 cm tall. Cd=0.8 Hypothesize how long it would take the bubble to rise to the top of the glass. Draw a complete force diagram of the bubble, including weight, buoyancy and drag forces. Make sure your coordinate axis points in the direction of...
The hydraulic oil in a car lift has a density of 8.10 x 102 kg/m3. The...
The hydraulic oil in a car lift has a density of 8.10 x 102 kg/m3. The weight of the input piston is negligible. The radii of the input piston and output plunger are 5.49 x 10-3 m and 0.127 m, respectively. What input force F is needed to support the 26800-N combined weight of a car and the output plunger, when (a) the bottom surfaces of the piston and plunger are at the same level, and (b) the bottom surface...
The hydraulic oil in a car lift has a density of 8.30 x 102 kg/m3. The...
The hydraulic oil in a car lift has a density of 8.30 x 102 kg/m3. The weight of the input piston is negligible. The radii of the input piston and output plunger are 7.30 x 10-3 m and 0.136 m, respectively. What input force F is needed to support the 23800-N combined weight of a car and the output plunger, when (a) the bottom surfaces of the piston and plunger are at the same level, and (b) the bottom surface...
(a) Calculate the settling velocity of glass spheres (density = 2467 kg/m3) having diameter as 1.5...
(a) Calculate the settling velocity of glass spheres (density = 2467 kg/m3) having diameter as 1.5 mm in water. The slurry contains 65% by weight solid. Use Newton’s law. (b) Mixture of an ore (density 2000 kg/m3) and gangue (density 7000 kg/m3) is to be separated in a hydraulic elutriator. The mixture has following size distribution, which is valid for ore as well as gangue. Predict the upward velocity of water in elutriator so that entire ore is collected in...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT