Engineering College

## Answers

**Answer 1**

**Answer:**

A) 3 m

**Explanation:**

The major head loss is calculated by using the expression: [tex]f \dfrac{L}{D}( \dfrac {U^2}{2g})[/tex]

here:

U = Q/A

Using the continuity equation:

[tex]U = \dfrac{Q}{\dfrac{\pi}{4}D^2}[/tex]

[tex]U = \dfrac{5/60 \ m^3/s}{\dfrac{\pi}{4}(0.2)^2}[/tex]

U = 2.65 m/s

Reynolds no = [tex]\dfrac{\rho U D}{\mu}[/tex]

[tex]= \dfrac{998 \ kg/m^3 \times 2.65 \ m/s \times 0.2 m}{8.93 \times 10^{-4} \ Pa^-s}[/tex]

= 594,894

Thus, this implies that the flow is turbulent.

Using Moddy's diagram at 5.94 × 10⁻⁵ &;

the relative roughness of 0.01

f = 0.038

Thus, the major head loss = [tex]f \dfrac{L}{D}( \dfrac {U^2}{2g})[/tex]

[tex]=0.038 \times (\dfrac{45\ m }{0.2\ m } )\times \dfrac{(2.65 \ m/s) ^2}{2(9.81 \ m/s^2)}[/tex]

= 3.06 m

[tex]\simeq[/tex]** 3 m**

## Related Questions

Signal loss is the reduction of a signal that occurs in a medium as a function of the physical length of the channel. This is known as:_________

a. degradation.

b. attenuation.

c. frequency degradation.

d. amplitude degradation.

### Answers

Answer:

B) Attenuation

Explanation:

Attenuation can be regarded as the loss of signal strength which could be as a result of both external and internal factors. This loss of signal strength could occur in networking cables as well as other connections. Attenuation is a loss in energy, because as signal travels, its strength decreases as a a result of distance it covers, this loss of energy is due to the signal trying to overcome the resistance at the medium. One of the main the causes of attenuation is When there is Extra noise on available networks, networks such as electrical current as well as radio waves. It should be noted that attenuation is Signal loss which is the reduction of a signal that occurs in a medium as a function of the physical length of the channel.

Singnal attenuation can taken care of by using lower loss materials with high cost, instead of making of PCB routing length reduction. Amplifiers can also be engaged in amplifying attenuated signal to get back the original signal, this will compensate the loss.

Attenuation can be measured in decibels(dB), this gives the measurement of relative strengths of one signal at two different point or measurement of two signals.

Which best explains Susan B Anthony purpose in her speech “Women’s rights to the suffrage”

### Answers

**Answer:**

She wrote and delivered a speech in 1873, which came to be known as the “Women's Rights to the Suffrage” speech. In her address, she lets the audience know of her “crime” of voting. She reminds the listener that the Constitution of the United States says “we the people” and does not exclude women as people

**Answer:**

D. To show why she was justified in voting.

**Explanation:**

A soil with a cohesion of 25 kPa has a normal stress of 39 kPa and a shear stress of 56 kPa at the point of failure. The angle of internal friction for the soil is most nearly:__________.

### Answers

Answer:

39⁰

Explanation:

We have cohesion c = 25kpa

Then the normal stress = 39kpa

Shear stress = 56kpa

This question is asking us to find the angle of internal friction

Shear stress at the time of failure = cohesion C + normal stresstanΦ

56 = 25 + 39tanΦ

Φ = angle if refractive index

Φ = 38.48⁰

This is approximately 39⁰

Therefore in answer to this question, the angle of internal friction for the soil is nearly 39⁰

S

Calculate the torque developed by a motor that delivers 200 hp rotation at 3600 rpm. Use the Torque value to determine the diameter of a solid steel shaft with an allowable shear stress of 20,520 psi.

### Answers

**Solution :**

Given:

Power, P = 200 hp

= 110000 lbf ft/s

Speed, N = 3600 rpm

Power , [tex]$P=\frac{2 \pi NT}{60}$[/tex]

∴ Torque, [tex]$T = \frac{60 P}{2 \pi N}$[/tex]

[tex]$T = \frac{60 \times 110000}{2 \pi \times 3600}$[/tex]

T = 291.93 lb -ft

[tex]$T_{allow} = 20,250 \ psi$[/tex] ---- allowable shear stress

Therefore, torque , T = 391.93 lb-ft

T = 291.93 x 12 lb-in

∴ T 3503.16 lb-in

Now from the Torsion formula,

[tex]$\frac{T}{J}=\frac{T_{allow}}{ r}$[/tex]

Here, [tex]$r=\frac{d}{2} ; \ \ \ J=\frac{\pi d^4}{32}$[/tex] ---- polar moment of inertia.

∴ [tex]$\frac{T}{\frac{\pi d^4}{32}}=\frac{T_{allow}}{ d/2}$[/tex]

[tex]$T_{allow}=\frac{16 T}{\pi d^3}$[/tex]

[tex]$\pi d^3=\frac{16 \times 3503.16}{20520}$[/tex]

[tex]$\pi d^3 = 2.7315$[/tex]

[tex]$d^3 = 0.8699$[/tex]

or [tex]$d= (0.8699)^{1/3}$[/tex]

d = 0.9546 in

Therefore the diameter of the shaft is 0.9546 in.

What other ways could a wildfire be contained, extinguished, or slowed down?

### Answers

Back burning, starting fires infront of the main fire to prevent the fire from spreading and depleting fuel for the fire, digging trenches so the fire has no where to go, dropping water from planes or helicopters.

A wheel barrow is used to lift a 150 lb load. The length from the wheel axle to the center of the load is 2 ft. The length from the wheel and axle to the effort is 6 ft. a. What is the ideal mechanical advantage of the system? b. Using static equilibrium calculations, calculate the effort force needed to overcome the resistance force in the system.

### Answers

**Answer:**

[tex]3:1[/tex]

[tex]50\ \text{lb}[/tex]

**Explanation:**

[tex]F_r=150\ \text{lb}[/tex]

Mechanical advantage is will be the ratio of the distances from the wheel axle of the forces.

[tex]MA=\dfrac{6}{2}\\\Rightarrow MA=3:1[/tex]

**The ideal mechanical advantage of the system is **[tex]3:1[/tex]**.**

The moment in the system is conserved so moment about the wheel axle is

[tex]M_e=M_r\\\Rightarrow 6F_e=2F_r\\\Rightarrow F_e=\dfrac{2F_r}{6}\\\Rightarrow F_e=\dfrac{2\times 150}{6}\\\Rightarrow F_e=50\ \text{lb}[/tex]

**The required effort force is **[tex]50\ \text{lb}[/tex]**.**

The process by which natural forces move weathered rock and soil from one place to another is called

a)soil conservation. b)deposition. c)abrasion. d)erosion

### Answers

**Answer:**

Erosionis the geological process in which earthen materials are worn away and transported by natural forces such aswindorwater. A similar process,weathering, breaks down ordissolvesrock, but does not involve movement.Erosion is the opposite ofdeposition, the geological process in which earthen materials are deposited, or built up, on alandform.

Most erosion is performed by liquid water, wind, or ice (usually in the form of aglacier). If the wind isdusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in thefluid(air or water) and being transported from one place to another. This transported material is calledsediment.

**Explanation:**

*Physical erosion describes the process of rocks changing their physical properties without changing their basic chemical composition. Physical erosion often causes rocks to get smaller or smoother. Rockseroded through physical erosion often form clastic sediments.Clastic sediments are composed of fragments of older rocks that have been transported from their place of origin.**Landslides and other forms ofmass wastingare associated with physical weathering. These processes cause rocks to dislodge from hillsides and crumble as they tumble down a slope.*

*Landslides and other forms ofmass wastingare associated with physical weathering. These processes cause rocks to dislodge from hillsides and crumble as they tumble down a slope.*

*Plant growth can also contribute to physical erosion in a process calledbioerosion. Plants break up earthen materials as they take root, and can create cracks andcrevices in rocks they encounter.*

*I** **HOPE** **I** **HELPED** **YOU*

(A) Explain why residual thermal stresses are introduced into a glass piece when it is cooled.(B) Are thermal stresses introduced upon heating? Why or why not?

### Answers

Answer:

Yes, they are

Explanation:

A

Assuming that a glass piece is cooled from an elevated temperature, then the internal stresses which are also called thermal stresses, gets inroduced due to result of the difference in cooling rate and that of the thermal contraction that exists between the surface and the interior regions. They can lead to fractures such as thermal shock, as a result, we deem these thermal stresses important.

B

Yes, they are. They are introduced upon heating due to the thermal expansion that takes place

When a retaining structure moves towards the soil backfill, the stress condition is called:__________.

(A) at rest state,

(B) active state.

(C) passive state.

(D) both (B) and (C)

### Answers

**Answer:**

(C) passive state.

**Explanation:**

The earth pressure is the pressure exerted by the soil on the shoring system. They are three types of earth pressure which are:

a) Rest state: In this state, the retaining wall is stationary, this makes the lateral stress to be zero.

b) Active state: In this state, the wall moves away from the back fill, this leads to an internal resistance. Hence the active earth pressure is less than earth pressure at rest

c) Passive state: In this state the wall is pushed towards the back fill, this leads to shearing resistance. Hence, the passive earth pressure is greater than earth pressure at rest

please any one know how to find the unit hydrograph ????!!!!!!!!!!! its important

### Answers

**Answer:**

roughly 13,or 12, or 11

**Explanation:**

The van der Waals equation is a modification of the ideal gas equation. What two factors does this equation account for? A. (1) Real gas molecules exert forces on each other. (2) Gas molecules have energy. B. (1) Real gas molecules exert ionic forces on each other. (2) Gas molecules have energy C. (1) Real gas molecules exert forces on each other. (2) Gas molecules have volume. D. (1) Real gas molecules exert ionic forces on each other. (2) Gas molecules have volume. E. None of the above have BOTH of the two factors accurately stated HINT: Check Van der Waals equation.

### Answers

**Answer:**

E

**Explanation:**

The vander waals equation

[tex](P+n^2a/V^2)(V-nb)[/tex]=nRT

The factor **n^2a/V^2** accounts for the attractive forces between the gases molecules whereas **nb** accounts for the decrease in volume occupied by the gas. Therefore, correct option would be E. None of the above have BOTH of the two factors accurately stated

The **correction **of** Van Der Waal **to the** ideal gas equation** is that; real gas molecules **exert forces **on each other and that gas molecules **have volume. **

Van Der Waal (1873) proposed a modification to the **ideal gas equation**; PV = nRT. The ideal gas law assumes that molecules of gases do not have a **definite volum**e but occupies the** same volume** as the container and do not exert any** attractive forces** on each other.

However, Van Der Waal introduced two major corrections to the ideal gas equation;

The gas molecules **have real volume**, V - nb gives the volume of the container that is** inaccessible** to the gas molecules.The second correction has to do with the fact that the gases actually **exert an attractive force** on each other. The real pressure of the gas is less than the ideal pressure of the gas which is captured in the term; P + an^2/V^2.

Hence, the ideal gas equation is now written as;

[tex](P + \frac{an^2}{V^2}) (V - nb) = nRT[/tex]

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what is the relationship between magnetism and electromagnetism and how does this effect voltage in a circuit?

### Answers

**Answer:**

A magnetic field of changing intensity perpendicular to a wire will induce a voltage along the length of that wire. The amount of voltage induced depends on the rate of change of the magnetic field flux and the number of turns of wire (if coiled) exposed to the change in flux.

**Please mark Brainliest! **

A **magnetic field** of changing intensity perpendicular to a wire will induce a **voltage** along the length of that wire.

**What is Electromagnetism?**

The amount of **voltage **induced depends on the rate of change of the **magnetic field** flux and the number of turns of wire (if coiled) exposed to the change in **flux.**

The interaction of the **electromagnetic field,** all electrically charged things, and all objects with **magnetic moments. **

One of the universe's four fundamental **interactions** is the **electromagnetic interaction**. This interaction includes all atomic, electrical, magnetic, and **electromagnetic **phenomena as well as light and light fields.

Therefore, A **magnetic field** of changing intensity perpendicular to a wire will induce a **voltage** along the length of that wire.

To learn more about **Electric field,** refer to the link:

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Two grenades, A and B, are thrown horizontally with different speeds from the top of a cliff 70 m high. The speed of A is 2.50 m/s and the speed of B is 3.40 m/s. Both grenades remain in air for 3.77 s. Assume that the acceleration due to gravity is 9.86 m/s2. What is the distance between A and B if they are thrown along the same straight line?

### Answers

**Explanation:**

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Propyl Benzhydryl Ether (continued on next page):

(1) What volume of 1-pentanol is needed to convert 1.50 grams of benzhydrol to n-pentyl benzhydryl ether?

(2) Based on the results of this experiment, write a mechanism for the acid catalyzed reaction of benzhydrol with 1-pentanol to give the product from the last question. (Note: the mechanism is written on the first page of this experiment. You just have to figure out, based on the experimental results, which alcohol is ROH and which is R'OH and the write it using those two alcohols.)

(3) Under milder temperatures than what is needed for dehydration, strong acids catalyze the self-condensation of 1-propyl alcohol to give di-n-propyl ether. The mechanism differs from that of today's reaction in that the protonated alcohol undergoes an Sy2 rather than an Syl reaction. Write the mechanism for the acid catalyzed condensation of ethyl alcohol to give diethyl ether. Note: make sure your mechanism has the following three steps (a) protonation (b) Sx2 (not Syl) and finally (c) deprotonation.

### Answers

**Answer:**

See detailed explanation and image attached

**Explanation:**

1 mole of 1-pentanol reacts with 1 mole of benzhydrol

Number of moles in 1.5 g of benzhydrol = mass/molar mass = 1.5 g/184 g/mol = 0.008 moles of benzhydrol

x moles of 1-pentanol reacts with 0.008 moles of benzhydrol

x = 0.008 moles of 1-pentanol

If 1 mole occupies 22.4 L

0.008 moles occupies 22.4 * 0.008 moles = 0.179 L of 1-pentanol is required.

The mechanism of the formation of n-pentyl benzhydryl ether involves the protonation of the -OH group in benzhydrol. This is followed by loss of water molecule creating a carbocation which is attacked by the 1-pentanol. Abstraction of a proton by a base completes the mechanism, regenerates the acid and yields the n-pentyl benzhydryl ether as shown in the image attached.

The synthesis of diethyl ether occurs by protonation of one ethanol molecule followed by SN2 attack by anothe ethanol molecule and a simultaneous loss of a water molecule. Deprotonation by a base yields the diethyl ether

If a designer is developing a plan for a project in which the entire part is made out of ¾" thick plywood and he only wants to use one view, he should use the _______________ view.Immersive Reader Back Front Right Top

### Answers

Answer: Front View.

Explanation:

Since the design of the developers for the project is based around creating a component with a 3⁄4 thick plywood. The only view he should consider should be the front view, so it will be easier to show the project to potential buyers or clients who are typically more concerned about aesthetics by using the front view.

Technician A says that some vehicle makers do NOT apply undercoating to the floor pan. Technician B says that some vehicle makers do NOT apply anti-corrosion compound to interior cavities. Who is right?

### Answers

Answer:

Explanation:

Both technicians are right

What are shims used for ?

### Answers

Bro search that up on goggle

Either b or c I believe

Your sprayer has a 60-foot wide boom with 36 nozzles along this 60-foot length. Your spray speed is 4.5 miles per hour and you want 25 GPA. How much should you catch per nozzle in 15 seconds to be properly calibrated?

### Answers

**Answer:**

**358.52 m/s**

**Explanation:**

From the information given:

The required amount you should catch per nozzle in 15 secs. can be determined by using the formula:

[tex]Gallons/Min = \dfrac{(Gallons/Acre \times Miles/Hour \times nozzle \ spacing )}{5940}[/tex]

where;

Gallons/Acre = 25 GPA

[tex]= \dfrac{(25 \times 4.5 \times 60 \times \dfrac{12}{ 36})}{5940} \times \dfrac{15}{60}[/tex]

[tex]= \dfrac{(25 \times 4.5 \times 60 \times0.333)}{5940} \times 0.25[/tex]

[tex]= \dfrac{(2247.75)}{5940} \times 0.25[/tex]

= 0.0946 gps

**= 358.52 m/s**

Your friend has two substances A and B which are compressed liquid and superheated vapor respectively. Both are in rigid vessels. Your friend claims that when he cools down both substances they started to boil. Can this be true? Explain yourself using a T-v diagram.

### Answers

**Answer:**

Following are the solution to the given question:

**Explanation:**

The material is necessary to cook since frying is a speedy process for evaporation.

Drug A is now in the compressed fluid area, and the material would not boil if the pressure is chilled. Because the ship is solid, its substance A claim is false.

Unless the volume comprises of a drop in the heat, the B substance reaches a vapor pressure area and a wet region. That's the area that melting may occur. His claim for material B could therefore be true.

Crank OA rotates with uniform angular velocity 0 4 rad/s along counterclockwise. Take OA= r= 0.5

m,AB2r,and BC 2r.For the instant, 45,OA is horizontal and AB is vertical.

determine the angular velocity and angular acceleration of BC.

### Answers

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Lucia is playing with magnetic toy vehicles. She has two identical toy vehicles (purple and pink) that start on opposite sides of a center magnet that cannot move. She moves both vehicles one space closer to the center magnet

### Answers

**Incomplete question.** The remaining part of the question read;

How did the potential energy of the two vehicles change? Did the potential energy of one vehicle change more than the other? Why do you think so?

**Explanation:**

1. The potential energy of the two vehicles** increased** because we could observe that they have unlike poles moving towards the center of the magnet. So the magnet field would be repealing both toy vehicles.

2. The potential energy of **the pink vehicle** change more than **the purple vehicle.** This is evident as we notice the pink vehicle is closer to the center of the magnet than the other.

3. The reason for this is because **Lucia **exerts more force (potential energy) on the pink vehicle to fight the repelling effect of the magnet

Answer:

1. The potential energy of the two vehicles increased because we could observe that they have unlike poles moving towards the center of the magnet. So the magnet field would be repealing both toy vehicles.

2. The potential energy of the pink vehicle change more than the purple vehicle. This is evident as we notice the pink vehicle is closer to the center of the magnet than the other.

3. The reason for this is because Lucia exerts more force (potential energy) on the pink vehicle to fight the repelling effect of the magnet

Explanation:

what information should a professional engineer keep private

### Answers

their social security number

What project is this ?

### Answers

**Answer:**

**a building project...**

**Explanation:**

17. When shopping around for a bank, you should consider all of the following EXCEPT: *

. Bank fees charged

B. Services provided by the bank

C. The bank teller's level of education

D. Minimum Balance you have to maintain

### Answers

Answer: C. The bank teller's level of education

Explanation:

When shopping around for a bank, some of the factors that an individual should consider include the fees charged by the bank, the services provided by the bank and the minimum balance that one must have in order to maintain the account opened.

One is not concerned with the bank teller's level of education. This is the concern of the management of the bank and the human resource department. It is the management that will determine the kind of person they want any for the position and the level of education he or she must have.

Therefore, the correct option is C.

A good place to get hints about how to answer a response question could be

a.

Your teacher

c.

Both of these

b.

The rest of the test

d.

None of these

Please select the best answer from the choices provided

A

B

C

D

### Answers

**Answer:**

I think its A

**Explanation:**

A maybe?

...............................

Calculate the number of vacancies per cubic meter at 1000∘C for a metal that has an energy for vacancy formation of 1.22 eV/atom, a density of 6.25g/cm^3, and an atomic weight of 37.4 g/mol.

(A) 1.49×10^18 m^−3

(B) 7.18×10^22 m^−3

(C) 1.49×10^24 m^−3

(D) 2.57×10^24 m^−3

### Answers

Answer:

C

Explanation:

N = Na.P/A------(1)

Na = avogadro's number = 6.02210²³

P = density

A = atomic weight of metal

When we substitute into equation 1 above we get

1.0x10²⁹atoms/m³

From here we calculate the number of vacancies

T = 1000⁰c = 1273K

The formula to use is

Nv= Nexo(Qt/K.T) -----(2)

Qt = 1.22eV

K = Boltzmann's constant = 8.6210x10^-5

When we substitute values into equation 2

We get Nv = 1.49 x 10²⁴m-3

Therefore option c is correct

Check attachment for a more detailed calculation of this question

What is the purpose of O-ring and valve seals in a cylinder head?

### Answers

**Answer:**

its to show the shape is flat and only flat at the botom and top and you can set it up ther way and it wlll still look the same.

**Explanation:**

**O rings and valve seals** are used to **block **a path to prevent **escape **of a **liquid or a gas. **

What is cylinder head?

The **cylinder head** controls** air or fuel** flow in and out of the **cylinders.**

The **O ring** in cylinder head is placed into a **groove **to secure them in place. They are **compressed **between two **surfaces **to have a** seal pack**. The **O-ring or valve seal** creates a** air and liquid-tight** mating surface.

Thus, **O rings and valve seals** are used to **block **a path to prevent **escape **of a **liquid or a gas. **

Learn more about** cylinder head.**

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define the power of a machine

### Answers

**Answer:**

Power of a machine is defined as its rate of doing work. It is the rate of transfer of energy. The power of a machine is said to be one watt if it can work at the rate of one joule in one second.

**Explanation:**

To attain maximum power delivered to a load, what value of load impedance is required if 1. the load can have any complex value; 2. the load must be pure resistance?

### Answers

Answer:

Explanation:

Maximum power will be delivered to the load if

Z(load) = Z(t)*

If the Thevenin is defined as Z(t) = R(t) + jX(t), then the load impedance will be

Z(load) = Z(t)* = R(t) - jX(t)

Finding the equivalent impedance, we have that

Z(eq) = Z(t) + Z(load)

Simplifying further, we have

Z(eq) = R(t) + jX(t) + R(t) - jX(t)

Z(eq) = 2R(t)

Therefore, maximum power will be delivered to the load when Z(load) = Z(t)*

Maximum power will be delivered to a pure resistance table if

R(load) = |Z(t)|

Again, if we define the impedance of Thevenin, we have

Z(t) = R(t) + jX(t)

And therefore, our load resistance is

R(load) = √[R(t)² + X(t)²]

The Republican National Committee publishes a monthly digest of information for Republicans called .

### Answers

**Answer: The Republican**

**Explanation:**