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White raven [17]
3 years ago
13

Consider tests of an unswept wing that spans the wind tunnel and whose airfoil section is NACA 23012. Since the wing model spans

the test section, we will assume that the flow is two dimensional. The chord of the model is 1.3 m. The test section conditions simulate a density altitude of 3 km. The velocity in the test section is 360 km/h.
a. What is the lift per unit span (N/m) that you would expect to measure when the wing attack angle is 4°?
b. What would be the corresponding section lift coefficient and die moment coefficient (about the quarter-chord point)?

Engineering
1 answer:
Dominik [7]3 years ago
3 0

Answer:

Check the explanation

Explanation:

to know the lift per unit span (N/m) that is expected to be measured when the wing attack angle is 4°

as well as the corresponding section lift coefficient and die moment coefficient .

Kindly check the attached image below to see the step by step explanation to the above question.

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Which is an example of a subsystem and system relationship?
Zanzabum

The example of a subsystem and system relationship is option

A) mechanical toggle, Xbox controller

Explanation:

  • Controls and Controllers are known as the mechanical, electro-mechanical, or electronic devices which are used to  input signals to change the conditions or values which are in processes or access to buildings, operators, gated areas, etc.
  • When you press and hold the given Shift button, these buttons which are chosen becomes an alternate inputs.
  • Normally, there are three controllers(PID) which are used in any of the process industries inorder to maintain and control the required setpoint.
  • an example of a subsystem and system relationship is a mechanical toggle, Xbox controller
  • Controllers improve the steadiness and state of accuracy by decreasing the steady state error. When the steady state accuracy gets better, the stability also improves.
  • Controllers are also used to help in reducing the unwanted offsets which are produced by the system.

6 0
2 years ago
A vertical piston-cylinder assembly contains water. The piston has a mass of 2 kg and a diameter of 7 cm . Assume atmospheric pr
Step2247 [10]

Answer:

for a) F= 744.97 N

for a) F= 167.85 N

for a) F= 764.57 N

Explanation:

the pressure developed by the piston should be higher than the saturated vapor pressure of water for boiling point at T=120 to ensure boiling.

Then from steam tables

T= 120°C → P required=Pr= 198.67 kPa

then the pressure developed by the piston is

P = (m*g + F)/A

where m= mass of the piston ,g= gravity F= force required and A= area of the piston

then

Pr = P = (m*g + F)/A

F = Pr*A-m*g

since A= π/4*D²

F =π/4* Pr*D²-m*g

replacing values

F =π/4* Pr*D²-m*g = π/4*198.67  *10³Pa*(0.07m)² -2kg* 9.8m/s²

F= 744.97 N

b) for T₂=80°C → Pr₂=47.41 kPa

F₂ =π/4* Pr₂*D²-m*g = π/4*47.41*10³Pa*(0.07m)² -2kg* 9.8m/s²

F₂= 167.85 N

c) for m=0 (mass of the piston neglected) ,the force required is

F₃ =π/4*Pr*D² =  π/4*198.67 *10³Pa*(0.07m)²= 764.57 N

F₃ =764.57 N

4 0
3 years ago
The radiation meter is showing radiation 2x as much as background. Is this a hot zone? If so why or why not?
kakasveta [241]

Answer:

This is not a clear indication of the hot zone as the information of the radioactivity of the background is not provided clearly.

Explanation:

According to IAEA as well as NRCP, the hot area is defined on the basis of the radioactivity reading it shows instead of contrast or comparative reading from the background. The value of radiation activity which will be required to declare an area as hot zone is if it is greater than 0.1 mSv/h or 1.5091\times 10^{29} kg^{-1} s^{-1}.

5 0
2 years ago
Create an application named NumbersDemo whose main() method holds two integer variables. Assign values to the variables. In turn
Mashcka [7]

Answer:

The solution code is written in C++.

  1. int main() {
  2.    int a = 5;
  3.    int b = 4;
  4.    displayTwiceTheNumber(a);
  5.    displayTwiceTheNumber(b);
  6.    displayNumberPlusFive(a);
  7.    displayNumberPlusFive(b);
  8.    displayNumberSquared(a);
  9.    displayNumberSquared(b);
  10.    return 0;
  11. }
  12. void displayTwiceTheNumber(int num){
  13.    cout << num * 2;
  14. }
  15. void displayNumberPlusFive(int num){
  16.    cout << num + 5;
  17. }
  18. void displayNumberSquared(int num){
  19.    cout << num * num;
  20. }

Explanation:

Firstly, create two integer variables, <em>a</em> and <em>b and </em>two sample values are assigned to the two variables, respectively (Line 3-4). Next, we pass the value of each variable <em>a</em> and <em>b</em> to the methods named <em>displayTwiceTheNumber(), displayNumberPlusFive(),</em> and <em>displayNumberSquared() </em>(Line 6- 13).

4 0
3 years ago
Need help with these 3 questions pls help
Anton [14]

Answer:

I think 5 is passion and 6 is true I think and 7 is time management I'm pretty sure

3 0
2 years ago
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