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Aneli [31]
3 years ago
7

2. A trapezoidal channel has a bottom width of 4 m and side slopes of 2:1 (H:V). If the flow rate is 50 m3/s at a depth of 3.6 m

, report whether the flow is subcritical or supercritical. Also determine the alternate depth (for the same specific energy). Also determine the critical depth.
Engineering
1 answer:
Daniel [21]3 years ago
4 0

Answer:

Explanation:

Sum of the side slope = 2 + 1 = 3

Length of first slope = 2/3 X 3.6 = 2 X 1.2 = 2.4m

Lenght of second slope = 1/3 X 3.6 = 1.2m

Area of the trapezoidal channel = (2.4 + 1.2)/2 X 3.6 = 1.8 X 3.6 = 6.48m²

Alternate dept = 50m³/6.48m²= 7.716m

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solong [7]

The guy named Kirby didn't touch the power button on the projector. If he touched means the projector will work fine.

<u>Explanation</u>:

  • Kirby touched the gear on the projector. He should check the projector carefully before operating the projector. But he didn't check properly.
  • There was a blue rip in the projector. Kirby fails to notice the blue rip. Without minding that he has started the projector. So the tape and the projector is not working well.
  • He should fix the blue rip and he should press the start button in the projector. The mistake is he didn't do that. This is the thing that made the projector ripped.                                                                                                                                                                  

                           

7 0
3 years ago
A dual voltage/dual resistance AC hair dryer can be used with a 120 V or 230 V power supply. A switch allows the user to set the
NISA [10]

Answer:

The power is  p= 5621 W

Explanation:

In order to obtain the power it consumes we need to first obtain the resistance of the hair dryer at 120 V

                  R = \frac{V^2}{P} = \frac{(120 V)^2}{1530W} = 9.411 \Omega

Now the power supplied in Europe at their voltage of 230V would be

                           P = \frac{V^2} {R} = \frac{(230V)^2}{9.411 \ \Omega} = 5621 W

Looking the power obtain we see that it is higher than 1530 W so this would cause the dryer to smoke.

                     

3 0
4 years ago
How does distribution add value to goods and services being sold,
Kay [80]

Answer:

Distribution (or its more sophisticated counterpart, supply chain management) can add value to goods and services by making them more easily and conveniently available to consumers. ... This means that you need good wholesalers and good transportation systems to get your products to the retailers.

Explanation:

Distribution (or its more sophisticated counterpart, supply chain management) can add value to goods and services by making them more easily and conveniently available to consumers. ... This means that you need good wholesalers and good transportation systems to get your products to the retailers.

4 0
3 years ago
Read 2 more answers
Write an application named EnterUppercaseLetters that asks the user to type an uppercase letter from the keyboard. If the charac
ozzi

Answer:

The solution code is given below

  1. using System;
  2. using System.Linq;
  3.      
  4. public class Program
  5. {
  6. public static void Main()
  7. {
  8.  string[] letters = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T","U", "V", "W", "X", "Y", "Z"};
  9.  
  10.  Console.WriteLine("Please input a letter: ");
  11.  string input_letter = Console.ReadLine();
  12.  
  13.  if(letters.Contains(input_letter)){
  14.   Console.WriteLine("OK");
  15.  }else{
  16.   Console.WriteLine("Error. Not uppercase letter.");
  17.  }  
  18. }
  19. }

Explanation:

Firstly we import the necessary libraries, System and Linq (Line 1-2).

Next we create a string array to hold all uppercase letters (Line 8).

Next, we prompt user to input a letter using the ReadLine() method (Line 10 - 11)

At last, we define if and else conditions to check if the letters contains the input letter. If so, print ok else print an error message. (Line 13-17)

6 0
3 years ago
On the first statistics exam, the coefficient of determination between the hours studied and the grade earned was 80%. The stand
True [87]

Answer:

\left[\begin{array}{ccccc}&DF&SS&MS&F\\Regression&1&7200&7200&72\\Error&18&1800&100\\total&19&900\end{array}\right]

Explanation:

Sample size, n=20

Degrees of freedom is 1

Number of degrees of freedom for error is n-2 hence 20-2=18

Total number of degrees of freedom is 18+1=19

Standard error estimate is s_{y-x}=\sqrt {\frac {SSE}{n-2}}

Here, SSE=(n-2)s_{y-x}^{2}=(20-2)(10)^{2}=1800

Coefficient of determination r^{2}=\frac {SSE}{SS total}

Here, SSR=r^{2}(SSR+SSE)

SSR=\frac {r^{2}}{1-r^{2}} SSE=\frac {0.8}{1-0.8}(1800)=7200

The total sum of squares is

SS total=SSR+SSE=7200+1800=9000

MSR=SSR=7200

MSE=\frac {SSE}{n-2}=\frac {1800}{20-2}=100

F value is given by

F=\frac {MSR}{MSE}=\frac {7200}{100}=100

The ANOVA table is then  

\left[\begin{array}{ccccc}&DF&SS&MS&F\\Regression&1&7200&7200&72\\Error&18&1800&100\\total&19&900\end{array}\right]

4 0
4 years ago
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