Derive an expression for the surface area per kilogram of material as a function of particle...
Derive an expression for the surface area per kilogram of material as a function of particle size. Assume that the material is divided into spheres, each having a diameter d and a density p = 1000 kg/m3 [1.0 g/cm3]. What is the surface area of 1 g of 0.1 nm-diameter particles?
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Derive an expression for the surface area per kilogram of
material as a function of particle...
A standard 1 kilogram weight is a cylinder 43.5 mm in height and 41.0 mm in...
A standard 1 kilogram weight is a cylinder 43.5 mm in height and 41.0 mm in diameter. What is the density of the material? kg/m3 Need Help? Watch It 2. -10 points SerPSE10 1.1.0P.002 My Notes Ask Your Teacher An artist creates a solid sculpture made from 8.70 kg of iron. She wishes to create an identical sculpture, using the same mold used to make the original, out of solid silver. What is the mass (in kg) of the silver...
Problem 6. Studies have shown that a white surface becomes noticeably dusty when 0.2 percent of...
Problem 6. Studies have shown that a white surface becomes noticeably dusty when 0.2 percent of its area is covered by black particles (i.e., soot). Assume that the same relationship applies for soil dust particles. Estimate the time required for an initially clean, horizontal surface to appear dusty if it is exposed to an atmosphere containing 10 μg m-3 of soil-dust particles of diameter 5 μm. Assume that the particles are spherical and have a density of 2.5 g cm3...
(a) Calculate time required for a virus particle that is 50 nm (50x10-9 m) in diameter...
(a) Calculate time required for a virus particle that is 50 nm (50x10-9 m) in diameter with a density of 1.03 g cm-3 suspended in water with a density of 1.0 g cm-3 to settle out of a water column that is 3 m deep. Assume the dynamic viscosity is 1x10-3 kg m-1 s-1. (b) What is the time required if the virus particle was attached to an Al(OH)3 floc that is 0.1 mm in diameter with a density of...
Copper can be cemented onto iron particles by the reaction. Cu2+ + Fe = Cu +...
Copper can be cemented onto iron particles by the reaction. Cu2+ + Fe = Cu + Fe2+. A dilute copper solution containing 0.50 g/L of copper is flowed continuously at a rate of 1 m3/h through a stirred tank reactor of volume 10 m3 containing 10 kg of suspended spherical iron particles with a diameter of Imm. The mass transfer coefficient of Cu2+ is 6 x 10-3 cm sl. (i) Calculate the concentration of copper ions in the discharge solution...
Density p [kg/m2], viscosity - u [kg/ms], surface tension - o (N/m=kg/s2] compressibility K [Pa-kg/ms2] 1. For particle...
Density p [kg/m2], viscosity - u [kg/ms], surface tension - o (N/m=kg/s2] compressibility K [Pa-kg/ms2] 1. For particles settling in a stationary fluid it is thought that the drag force FD of a small sphere is a function of the settling velocity of the sphere - V, the diameter of the sphere - d, and the density p, and viscosity of the fluid - . Determine the dimensionless relationship(s) between these variables (FD/HVd, pdV/H) 2. (a) The efficiency of a...
40. The atmospheric pressure (force per unit area) on a surface at an altitude z is due to the we...
problem 40 with parts
40. The atmospheric pressure (force per unit area) on a surface at an altitude z is due to the weight of the column of air situated above the surface. Therefore, the difference in air pressure p between the top and bottom of a cylindrical volume element of height Az and cross-section area A equals the weight of the air enclosed (density ρ times volume V-: ΑΔε times gravity g), per unit area: Let Δ、→0 to derive...
Part B mework 7 blem 11.79-Enhanced-with Hints and Feedback Determine the velocity of the particle at which Stokes' law becomes invalid, at about Re Express your answer to three significant f...
Part B
mework 7 blem 11.79-Enhanced-with Hints and Feedback Determine the velocity of the particle at which Stokes' law becomes invalid, at about Re Express your answer to three significant figures and include the appropriate units Review A 2.3-mm-diameter sand particle having a density of 2.40 Mg/m3 is released from rest at the surface of oi that is contained in the tube. As the particle fails downward, "creeping flow' will be established around it. The oil has a density of...
1. Two neutral spheres are attached to two identical springs and separated by 8.0 cm. When...
1. Two neutral spheres are attached to two identical springs and separated by 8.0 cm. When a charge of +2.5 x 10-6 C is placed on each sphere, the distance between the spheres doubles. The springs are then oriented vertically and a 560 g mass is placed on them. What compression would these springs experience? Assume both springs would share the force of the mass equally. 2. In a physics experiment designed to analyze collisions between electrons and π0 mesons...
You are given the following probability density function, 6x(r), for the cosine of the surface an...
You are given the following probability density function, 6x(r), for the cosine of the surface angle, S, of a laser etching tool. The distribution function has one parameter, a, and one constant, c. -1sxs1 a) What is the value of the constant, e? b) What is the moment estimator for a? c) Explain how you can determine if this moment estimator is unbiased. t... . 24) denote a random sample of sample size n 24 with sample mean of-0.01 and...
Solve the following problems please A container is filled to a depth of 19.0 cm with...
Solve
the following problems please
A container is filled to a depth of 19.0 cm with water. On top of the water floats a 35.0-cm-thick layer of oil with specific gravity 0.900. What is the absolute pressure at the bottom of the container? A cube of wood having an edge dimension of 18.9 cm and a density of 645 kg/m3 floats on water, What is the distance from the horizontal top surface of the cube to the water level? what...
A standard 1 kilogram weight is a cylinder 43.5 mm in height and 41.0 mm in diameter. What is the density of the material? kg/m3 Need Help? Watch It 2. -10 points SerPSE10 1.1.0P.002 My Notes Ask Your Teacher An artist creates a solid sculpture made from 8.70 kg of iron. She wishes to create an identical sculpture, using the same mold used to make the original, out of solid silver. What is the mass (in kg) of the silver...
Problem 6. Studies have shown that a white surface becomes noticeably dusty when 0.2 percent of its area is covered by black particles (i.e., soot). Assume that the same relationship applies for soil dust particles. Estimate the time required for an initially clean, horizontal surface to appear dusty if it is exposed to an atmosphere containing 10 μg m-3 of soil-dust particles of diameter 5 μm. Assume that the particles are spherical and have a density of 2.5 g cm3...
Copper can be cemented onto iron particles by the reaction. Cu2+ + Fe = Cu + Fe2+. A dilute copper solution containing 0.50 g/L of copper is flowed continuously at a rate of 1 m3/h through a stirred tank reactor of volume 10 m3 containing 10 kg of suspended spherical iron particles with a diameter of Imm. The mass transfer coefficient of Cu2+ is 6 x 10-3 cm sl. (i) Calculate the concentration of copper ions in the discharge solution...
Density p [kg/m2], viscosity - u [kg/ms], surface tension - o (N/m=kg/s2] compressibility K [Pa-kg/ms2] 1. For particles settling in a stationary fluid it is thought that the drag force FD of a small sphere is a function of the settling velocity of the sphere - V, the diameter of the sphere - d, and the density p, and viscosity of the fluid - . Determine the dimensionless relationship(s) between these variables (FD/HVd, pdV/H) 2. (a) The efficiency of a...
problem 40 with parts
40. The atmospheric pressure (force per unit area) on a surface at an altitude z is due to the weight of the column of air situated above the surface. Therefore, the difference in air pressure p between the top and bottom of a cylindrical volume element of height Az and cross-section area A equals the weight of the air enclosed (density ρ times volume V-: ΑΔε times gravity g), per unit area: Let Δ、→0 to derive...
Part B
mework 7 blem 11.79-Enhanced-with Hints and Feedback Determine the velocity of the particle at which Stokes' law becomes invalid, at about Re Express your answer to three significant figures and include the appropriate units Review A 2.3-mm-diameter sand particle having a density of 2.40 Mg/m3 is released from rest at the surface of oi that is contained in the tube. As the particle fails downward, "creeping flow' will be established around it. The oil has a density of...
You are given the following probability density function, 6x(r), for the cosine of the surface angle, S, of a laser etching tool. The distribution function has one parameter, a, and one constant, c. -1sxs1 a) What is the value of the constant, e? b) What is the moment estimator for a? c) Explain how you can determine if this moment estimator is unbiased. t... . 24) denote a random sample of sample size n 24 with sample mean of-0.01 and...
Solve
the following problems please
A container is filled to a depth of 19.0 cm with water. On top of the water floats a 35.0-cm-thick layer of oil with specific gravity 0.900. What is the absolute pressure at the bottom of the container? A cube of wood having an edge dimension of 18.9 cm and a density of 645 kg/m3 floats on water, What is the distance from the horizontal top surface of the cube to the water level? what...
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