NightCaribou644
15.04.2020 •
Physics
Our molecular model of matter describes a fluid as consisting of lots of little particles (atoms or molecules)
moving around very fast. Collisions between the molecules makes the particles of the fluid change directions and speeds often and randomly. We've talked about two different phenomena that depend on these random molecular interactions: viscosity and diffusion. Viscosity is the way collisions with other parts of the fluid slow down faster-moving bits of fluid, and diffusion is the way collisions spread out concentrations of molecules. Let's consider how the viscosity and diffusion coefficients might depend on the properties of the fluid by dimensional analysis
Part A
What are the units of viscosity, in base SI units (kg, m, s)?
Part B
What are the units of the diffusion coefficient, in base SI units (kg, m, s)?
Solved
Show answers
More tips
- S Sport Playing Bowling: Rules and Advice for Novices...
- C Computers and Internet How to Properly Repartition a Hard Drive?...
- A Auto and Moto What Is the Cost of Customs Clearance for a Car in Russia?...
- L Leisure and Entertainment Should You Buy a Ceramic Knife?...
- C Computers and Internet How to easily and quickly disable Firebug in Gmail and Google Docs...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
Answers on questions: Physics
- P Physics A high-speed dart is shot from ground level with a speed of 150 m/s at an angle 30° above the horizontal. What is the vertical component of its velocity after 4.0 s if...
- H History One effect the Bubonic Plague had on Europe was that it A. increased the productivity of labor. B. increased the diversity of labor. C. decreased the supply of labor....
- H History Which three of the following are outcomes the united states expected from the trans-pacific partnership (tpp)? shrinking of the market for american goods protect human...
- M Mathematics Please, please please help!!! my assignment is due today and i need help. Write an expression for the sequence of operations described below. double v, divide w by the...
- H History What were the unique organizations added to the new government in louisiana civil parishes and a more universal catholic church civil parishes and police juries police...
Ответ:
a) μ = [kg / m s]
b) D = m²/s
Explanation:
Viscosity is equivalent to a friction force that opposes the movement of fluids, it is defined by the relation
Shear stress = μ speed gradient
Fr/A = μ v₀ / h
Where Fr is the shear force, A the area, h the height and v₀ the velocity of the fluid layer
μ = [kg / m s]
The diffusion coefficient characterizes the ability of a material to move in a given solvent, depending on the size of the solute, the viscosity of the solvent, temperature
J = - D dΘ / dx
J is the broadcast glare
D = [m² / s]
Ответ: