« previous next »

Author Question: Reynolds' number is derived from which of the following components? a. Velocity of flow, radius ... (Read 43 times)

jjjetplane

  • Hero Member
  • *****
  • Posts: 556
on: Jul 16, 2018
Reynolds' number is derived from which of the following components?
 
  a. Velocity of flow, radius of tube, density of gas, and velocity of gas
  b. Velocity of flow, length of tube, density of gas, and velocity of gas
  c. Velocity of gas, radius of tube, viscosity of flow, and density of gas
  d. Flow asymmetry, shape of tube, density of gas, and length of tube

Question 2

When you discuss the mechanics of breathing, which expression of Poiseuille's law do you use?
 
  a. P =  R c. = P  R
  b. = P  R d. = 1/


rachel

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
The formula for Reynolds' number is NR = v  d  (2r/), where v is the velocity of the flow; r is the radius of the tube, and d and  are the density and viscosity of the gas, respectively.

Answer to Question 2

ANS: C
Poiseuille's law states that the pressure gradient required to cause a liquid to move through a tube is equal to the flow of the liquid through the tube multiplied by the resistance to flow. In a dis-cussion of gases, the term flow of the liquid is replaced with flow of the gas. Therefore, the flow of the gas is equal to the pressure gradient divided by the resistance to flow.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Structure of cholesterol and steroid hormones derived from cholesterol Structure of cholesterol and steroid hormones derived from cholesterol
The Three Components of Pain The Three Components of Pain
Peak flow meter. Peak flow meter.
The flow of energy and the cycling of materials maintain nature’s organization The flow of energy and the cycling of materials maintain nature’s organization
What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work ... What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work ...
The potential involvement of colchicine in doubling the chromosome number The potential involvement of colchicine in doubling the chromosome number
Video: Cataract

For a complete list of videos, visit our video library