Answer:
Critical Reynolds number is a number or the threshold or the limit at which the laminar flow changes to turbulent flow.
Explanation:
It is basically the ratio of inertial forces to viscous forces and helps to predict if the flow is laminar or turbulent.
from the experiments, for flow in a pipe of diameter D, critical Reynolds number=2300
For Laminar flow: Reynolds number is less than 2000
For transitional flow: Reynolds number is in between 2000-4000, the flow is unstable
For Turbulent flow: Reynolds number is greater than 3500
Reynolds number is different for different geometries
Answer:
B. evaluation of a particular program
Explanation:
Before students enrol into any given discipline, they should first ensure that their program of choice is well accredited. In a specific program, specialized accreditation has the function of telling would be students if the program meets up with academic standards in the field
Accreditation is a way of assessing faculty and curriculum quality of schools to make sure that they are up to academic standards and are also preparing students to future success in the field.
Answer:
The final temperature is 26.96 F
Explanation:
Initial pressure = 30 lbf/in^2 = 30×1.01325/14.696 = 2.1 bar
Initial temperature = 20 F = (20 - 32)/1.8 + 273 = 266.33 K
From steam table, entropy at 2.1 bar = 7.111 kJ/kg.K
Initial enthalpy = 7.111×266.33 = 1893.9 kJ/kg
Final pressure = 60 lbf/in^2 = 60×1.01325/14.696 = 4.1 bar
From steam table, entropy at 4.1 bar = 6.889 kJ/kg.K
Work = 0.5 Btu = 0.5×1.05506 = 0.5908 kJ
Change in enthalpy (∆H) = work/mass
mass of refrigerant = 0.04 lb = 0.04×0.45359 = 0.0181 kg
∆H = 0.5908/0.0181 = 32.64 kJ/kg
H2 = H1 - ∆H = 1893.9 - 32.64 = 1861.26 kJ/kg
Final temperature = final enthalpy ÷ final entropy = 1861.26 kJ/kg ÷ 6.889 kJ/kg.K = 270.2 K = 1.8(270.2 - 273) + 32 = -5.04 + 32 = 26.96 F
D. made because made is a synonym for assembled
Answer:
The customs of JROTC demonstrates respect for the nation and the JROTC program by doing the following;
1) Standing at an attention position facing the Colors or the direction from which the music is heard and saluting whenever the National Anthem is playing
2) Obeying the rules and regulations and abiding by all JROTC customs, courtesies and protocols including the observance of the protocols regarding the use of phones, going through a doorway, manner of address and what to do when a higher rank, officer or dignitary enters the room.
Explanation:
Courtesy in the military is an expression of respect and or consideration for other persons or a notion