« previous next »

Author Question: Reynolds' number is derived from which of the following components? a. Velocity of flow, radius ... (Read 59 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?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Relationship between fruit radius and beak length in populations of native and introduced species of Relationship between fruit radius and beak length in populations of native and introduced species of
Components of a MiniCiggy e-cigarette Components of a MiniCiggy e-cigarette
Comparison of the chemical structures of psilocybin and LSD. Psilocybin (left) is derived from a mu Comparison of the chemical structures of psilocybin and LSD. Psilocybin (left) is derived from a mu
The components of the respiratory system with micrographs of the respiratory epithelium and alveoli. ... The components of the respiratory system with micrographs of the respiratory epithelium and alveoli. ...
The coolant temperature is controlled by the thermostat, which opens and allows coolant to flow to ... The coolant temperature is controlled by the thermostat, which opens and allows coolant to flow to ...
Copy-number variants Copy-number variants
Video: Oral Hygiene & Braces Animation

For a complete list of videos, visit our video library