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nata0808 [166]
3 years ago
12

A rectangular channel 2 m wide carries 3 m3 /s of water at a depth of 1.2 m. If an obstruction 40 cm wide is placed in the middl

e of this channel, find the elevation of the water surface at the constriction (Note that Q remains unchanged but q changes). What is the minimum width of the constriction that will not cause a rise in the water surface upstream?
Engineering
1 answer:
Marta_Voda [28]3 years ago
8 0

harden you could either me or leave

harden you could either me or leave

Xharden you could either me or leave

harden you could either me or leave

BBB

harden you could either me or leave

GO WATCH AFTER OUT NOW RADDED RB

harden you could either me or leave

harden you could either me or leave

harden you could either me or leave

harden you could either me or leave

GO WATCH AFTER OUT NOW RADDED R

harden you could either me or leave

GO WATCH AFTER OUT NOW RADDED R

harden you could either me or leave

harden you could either me or leave

GO WATCH AFTER OUT NOW RADDED R

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A ramjet operates by taking in air at the inlet, providing fuel for combustion, and exhausting the hot air through the exit. Th
UNO [17]

Answer:

15300 N

Explanation:

\rho_i = Density of air at inlet

\dfrac{m}{t} = Mass flow rate = 60 kg/s

v_i = Inlet velocity = 225 m/s

\rho_o = Density of gas at outlet = 0.25\ \text{kg/m}^3

A_i = Inlet area

A_o = Outlet area = 0.5\ \text{m}^2

Since mass flow rate is the same in the inlet and outlet we have

\rho_iv_iA_i=\rho_ov_oA_o\\\Rightarrow v_o=\dfrac{\dfrac{m}{t}}{\rho_oA_o}\\\Rightarrow v_o=\dfrac{60}{0.25\times 0.5}\\\Rightarrow v_o=480\ \text{m/s}

Thrust is given by

F=\dfrac{m}{t}(v_o-v_i)\\\Rightarrow F=60\times (480-225)\\\Rightarrow F=15300\ \text{N}

The thrust generated is 15300 N.

8 0
3 years ago
Write a program that adds the numbers 1 through 5 into the numbers ArrayList and then prints out the first element in the list.
nekit [7.7K]

Answer:

Answer code is given below along with comments to explain each step

Explanation:

Method 1:

// size of the array numbers to store 1 to 5 integers

int Size = 5;  

// here we have initialized our array numbers, the type of array is integers and size is 5, right now it is empty.

ArrayList<Integer> numbers = new ArrayList<Integer>(Size);

// lets store values into the array numbers one by one

numbers.add(1)

numbers.add(2)

numbers.add(3)

numbers.add(4)

numbers.add(5)

// here we are finding the first element in the array numbers by get() function, the first element is at the 0th position

int firstElement = numbers.get(0);

// to print the first element in the array numbers

System.out.println(firstElement);  

Method 2:

int Size = 5;  

ArrayList<Integer> numbers = new ArrayList<Integer>(Size);

// here we are using a for loop instead of adding manually one by one to store the values from 1 to 5

for (int i = 0; i < Size; i++)  

{

// adding the values 1 to 5 into array numbers

  numbers.add(i);  

}

//here we are finding the first element in the array numbers

int firstElement = numbers.get(0);  

// to print the first element in the array

System.out.println(firstElement);  

6 0
3 years ago
Question #6 Fill in the Blank Complete the following sentence. The term describes initiatives and products that preserve the env
viktelen [127]

Answer:

The term "<u>green"</u> describes initiatives and products that preserve the environment

Explanation:

In order to preserve the environment the Environmental Protection Agency has provides tips for "Being Green on the Road", which highlights the topics including, Green Vehicle Guides, guides for Fuel Economy, guides for Clean Diesel and many more ways our environmental footprint can be reduced

A green economy is an economy that focuses on the reduction of risk of economic activity on the environment, such as the reduction of carbon emission and reduction in environmental pollution, biodiversity loss prevention, and promotes a sustainable development

A green tech aims to protect the environment and to reverse previous damage done to the environment, including technology for clean energy, water purification, and waste recycling.

6 0
3 years ago
1. What is engineering? Based on your current perception, in a few sentences define the term “engineering.”
andreev551 [17]

THANKSTHANSKTHANKSTHANSK

THANKSTHANSK

THANKSTHANSK

THANKSTHANSK

6 0
3 years ago
How can someone for Brainly delete your account? like serious question. How?
7nadin3 [17]

Answer:

I think the admins or whomever works for this app deletes accounts if it's against the guidelines and inappropriate

8 0
2 years ago
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