1- when designing a storm sewer, you should ensure the flow velocity will be less than 10-15 ft/s to prevent what? ( scouring or hydraulic jump or self-cleansing )
2- in order to prevent clogging and to facilitate maintenance, the minimum pipe diameter you should hse for storm sewer is (in inches)? (fill in blank)

Answer:

La diferencia media logarítimica de temperatura del intercambiador en paralelo es aproximadamente 75.466 ºC.

La diferencia media logarítmica de temperatura del intercambiador en contracorriente es aproximadamente 97.881 ºC.

Explanation:

De la teoría de Transferencia de Calor tenemos que un intercambiador de calor en paralelo presenta las siguientes dos características:

1) Tanto el fluido caliente como el fluido frío entran por el mismo lado.

2) Tanto el fluido caliente como el fluido frío salen por el mismo lado.

Mientras que el intercambiador de calor en contracorriente tiene que:

1) El fluido caliente y el fluido frío entran por lados opuestos.

2) El fluido caliente y el fluido frío salen por lados opuestos.

A continuación, anexamos los esquemas de perfil de cada intercambiador.

Ahora, la Diferencia Media Logarítimica de Temperatura (\(\Delta T_{lm}\)), medida en grados Celsius, queda definida como sigue:

\(\Delta T_{lm} = \frac{\Delta T_{1}-\Delta T_{2}}{\ln \frac{\Delta T_{1}}{\Delta T_{2}} }\) (Eq. 1)

Donde \(\Delta T_{1}\) y \(\Delta T_{2}\) son las diferencias de temperatura de los fluidos en cada extremo del intercambiador, medido en grados Celsius.

Procedemos a determinar esas diferencias y la Diferencia Media Logarítimica de Temperatura para cada configuración:

Intercambiador en paralelo

\(\Delta T_{1} = 180\,^{\circ}C-3\,^{\circ}C\)

\(\Delta T_{1} = 177\,^{\circ}C\)

\(\Delta T_{2} = 78\,^{\circ}C - 55\,^{\circ}C\)

\(\Delta T_{2} = 23\,^{\circ}C\)

\(\Delta T_{lm} = \frac{177\,^{\circ}C-23\,^{\circ}C}{\ln \frac{177\,^{\circ}C}{23\,^{\circ}C} }\)

\(\Delta T_{lm} \approx 75.466\,^{\circ}C\)

La diferencia media logarítimica de temperatura del intercambiador en paralelo es aproximadamente 75.466 ºC.

Intercambiador en contracorriente

\(\Delta T_{1} = 180\,^{\circ}C-55\,^{\circ}C\)

\(\Delta T_{1} = 125\,^{\circ}C\)

\(\Delta T_{2} = 78\,^{\circ}C-3\,^{\circ}C\)

\(\Delta T_{2} = 75\,^{\circ}C\)

\(\Delta T_{lm} = \frac{125\,^{\circ}C-75\,^{\circ}C}{\ln \frac{125\,^{\circ}C}{75\,^{\circ}C} }\)

\(\Delta T_{lm} \approx 97.881\,^{\circ}C\)

La diferencia media logarítmica de temperatura del intercambiador en contracorriente es aproximadamente 97.881 ºC.

There are different aspect of drilling operations. What the operator have to do to ensure hole concentricity and a good surface finish is to Increase the spindle speed one and a half times the normal rate.

Countersinking is often used to produce a conical hole linking the angled shape on the bottom side of a flat-head screw.

There is a required spindle speed used for countersinking operation . The lead out rule is of 1/3 the speed of a drill of the same size often work for almost all countersinking and counterboring operations.

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Answer:

The discharge temperature is 259.82 K

Explanation:

In this question, we are concerned with calculating the discharge temperature

Please check attachment for complete solution

For a polymer-polymer blend system (binary mixture), the type of phase separation that can be expected depends on the interactions between the polymers and their miscibility. The following keywords can be used to describe different types of phase separation:

1. USCT (Upper Critical Solution Temperature): In this case, the blend exhibits phase separation upon heating above a specific temperature. Below the critical temperature, the polymers are miscible, but phase separation occurs as the temperature exceeds the USCT.

2. LCST (Lower Critical Solution Temperature): This refers to phase separation occurring upon cooling below a specific temperature. The blend is miscible above the critical temperature, but phase separation occurs as the temperature decreases below the LCST.

3. Spinodal: A spinodal phase separation occurs when the blend is thermodynamically unstable, leading to the spontaneous formation of separate phases without the presence of a distinct critical temperature. This type of phase separation results in the formation of a bicontinuous morphology.

4. Binodal: Binodal phase separation refers to the situation where phase separation occurs at a specific composition and temperature. Above or below this composition and temperature, the blend remains miscible.

5. Droplet: In a droplet phase separation, one polymer forms dispersed droplets within the continuous phase of the other polymer. This occurs when the two polymers have limited miscibility.

6. Bicontinuous: Bicontinuous phase separation results in the formation of interpenetrating and continuous networks of the two polymers. The blend exhibits interconnected phases without a clear distinction between the two.

7. Macrophase separation: Macrophase separation is characterized by the formation of large-scale phase separation, resulting in distinct and separate regions of each polymer. This type of phase separation is more pronounced and easily visible.

The specific type of phase separation observed in a polymer-polymer blend will depend on factors such as the polymer chemistry, molecular weight, interactions, and thermodynamic properties of the polymers involved.

For a polymer-polymer blend system (binary mixture), the type of phase separation that is expected to be observed depends on the specific polymers and their interaction parameters. Here are the descriptions of the keywords you provided:

USCT (Upper Critical Solution Temperature): In a USCT phase separation, the polymer blend remains miscible above a certain temperature but undergoes phase separation as the temperature is lowered below the critical temperature. This results in the formation of two distinct phases.

LCST (Lower Critical Solution Temperature): In an LCST phase separation, the polymer blend remains miscible below a certain temperature but undergoes phase separation as the temperature is increased above the critical temperature. This leads to the formation of two distinct phases.

Spinodal: In a spinodal phase separation, the polymer blend spontaneously undergoes phase separation without the presence of a distinct phase boundary. This results in the formation of a continuous network structure or a bicontinuous morphology.

Binodal: In a binodal phase separation, the polymer blend undergoes phase separation with the formation of distinct droplet-like regions dispersed in a continuous phase. The phase separation occurs along a specific composition range.

Droplet: In a droplet phase separation, the polymer blend forms distinct droplets or domains of one polymer dispersed in a continuous phase of the other polymer. This can occur when the blend has a limited miscibility or the interaction between the polymers is unfavorable.

Bicontinuous: In a bicontinuous phase separation, the polymer blend forms a network-like structure with two continuous phases interpenetrating each other. This can occur when the blend has a high degree of miscibility or when the polymers have a specific compatibility.

Macrophase separation: In a macrophase separation, the polymer blend undergoes phase separation on a larger scale, resulting in the formation of macroscopic regions or domains of each polymer. This can occur when the blend has a limited miscibility or when there are significant differences in the properties of the polymers.

The specific type of phase separation observed in a polymer-polymer blend system depends on factors such as polymer composition, molecular weight, interaction parameters, and processing conditions. Experimental characterization techniques, such as microscopy, scattering methods, and thermal analysis, are often used to determine the nature of phase separation in polymer blends.

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Answer:

Amplifier gain is equal to 10.67.

Explanation:

Voltage gain of an amplifier can be expressed as this equation:

A_v = (V_output) / (V_input)

Where A_v is the gain, V_output is the output voltage, and V_input is the input voltage.

For this we will solve:

A_v = 128 mV / 12 mV

A_v = 10.67

So the amplifier's gain is 10.67.

Cheers.

Answer:

The voltage gain is 2.07.

Explanation:

Given that,

Resistance \(R_{1}=14\ k\Omega\)

Resistance \(R_{2}=13\ k\Omega\)

We need to calculate the voltage gain

Using formula of voltage source

\(V_{s}=\dfrac{V_{o}\times R_{2}}{R_{1}+R_{2}}\)

\(\dfrac{V_{o}}{V_{s}}=\dfrac{R_{1}+R_{2}}{R_{2}}\)

Where, \(R_{1}\) = first resistance

\(R_{2}\) =second resistance

\(V_{s}\) = source voltage

\(V_{o}\) = output voltage

Put the value into the formula

\(\dfrac{V_{o}}{V_{s}}=\dfrac{14+13}{13}\)

\(\dfrac{V_{o}}{V_{s}}=2.07\)

Hence, The voltage gain is 2.07

In a production line, the cycle time refers to the time needed to complete one process or a unit of the item being manufactured. For instance, if an assembly line manufactures 300 units per day, and they operate 3 shifts a day, then they must make sure that their cycle time aligns with the demand.

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By organizing your PowerPoint slides into sections, you can sort them more quickly. Click the triangle next to the section names to collapse a segment.

How do I make an Equilateral Triangle in PowerPoint 2010 that is perfect?

Three of the sides of an equilateral triangle coincide. True equilateral triangles are easy to make with PowerPoint. Just remember to hold down the SHIFT key when you draw your right triangle. The triangle's sides will all remain the same as a result of this. Pick the Right Triangle under Insert -> Shapes. The SHIFT key will maintain the ratio of each side when you draw a triangle on the slide.

What additional triangles can we make in PowerPoint?

This question has a straightforward solution. The shape points are editable, and the characteristics that the intended triangle requires.

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The maverick hybrid powertrain is an innovative system that combines a 2.5L Atkinson-cycle I-4 gasoline engine with an electric motor. When these two power sources work together, they can produce a considerable amount of power.

The gasoline engine in the maverick hybrid powertrain is designed using the Atkinson cycle, which is a thermodynamic cycle that improves fuel efficiency by reducing energy losses during combustion. This engine alone can produce up to 162 horsepower and 155 lb-ft of torque.

However, when the electric motor is added to the equation, the total power output of the hybrid powertrain increases significantly. The electric motor can provide up to 94 horsepower and 173 lb-ft of torque, which is a significant boost to the overall power output of the system.

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Answer:

true, false, true, true

Explanation:

Answer:

As P is continually increased, the block will now slip, with the friction force acting on the block being: f = muK*N, where muK is the coefficient of kinetic friction, with f remaining constant thereafter as P is increased.

The transition between the corrosion protection for the bond and free stressing lengths is a crucial aspect of structural design, as it ensures the long-term durability and integrity of the structure. This transition involves carefully designing and implementing measures to protect the bond and free stressing lengths from corrosion, which can weaken the structural elements and ultimately compromise the safety and stability of the entire structure.

In order to ensure a seamless transition between these two protection measures, several factors must be considered during the design process. First, the materials used in the bond and free stressing lengths should be compatible, as they will be exposed to similar environmental conditions and potential sources of corrosion. The use of high-quality materials with proven corrosion resistance is essential to minimize the risk of corrosion-related issues.

Next, proper detailing and reinforcement placement should be incorporated into the design to maintain adequate cover and ensure the bond and free stressing lengths are well-protected from potential corrosion. This may involve using a combination of passive and active corrosion protection systems, such as the application of protective coatings, the use of galvanic anodes, or the implementation of cathodic protection.

Additionally, the construction process should be carefully planned and executed to maintain the integrity of the corrosion protection measures during installation. This includes the proper handling and storage of materials, strict adherence to construction standards, and thorough quality control measures to verify the effectiveness of the implemented protection systems.

By taking these factors into account and designing the transition between the corrosion protection for the bond and free stressing lengths with careful consideration, engineers can help ensure the long-term durability and performance of the structure.

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Answer:

those look like clamps

Explanation:

The method of bending segment that can be used to monitor each bend is a. an elapsed time method.

Using an elapsed time method to monitor each bend is an effective approach in bending segments. This method involves measuring the time it takes to complete each bend. By tracking the elapsed time, it becomes easier to ensure consistency and accuracy in the bending process.

When utilizing an elapsed time method, the operator starts a timer at the beginning of each bend and stops it once the bend is completed. This allows for precise measurement of the time taken for each bend. By establishing a benchmark time for a specific bend, operators can monitor subsequent bends and compare their times to the benchmark.

Any significant deviation from the benchmark can indicate a potential issue in the bending process, allowing for adjustments or corrections to be made promptly.

The elapsed time method is particularly useful when multiple bends need to be made consistently, such as in manufacturing or construction applications. It provides a reliable and objective measure to ensure that each bend meets the required specifications. This method can help reduce errors and variations in the bending process, resulting in improved overall quality and efficiency.

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The most common applications for micro piles are structural foundation support, underpinning, wall support, and slope stabilization.

The master format is a common outline for organizing information about building materials and components. Its primary divisions include topics such as sitework, concrete, masonry, metals, wood, and plastics, among others.) Seismic retrofitting or strengthening is done to improve the structural capacities (strength, stiffness, ductility, stability, and integrity) of the structure so that the building's performance level can be raised to withstand the design earthquake consideration.

The mass concrete underpinning method is the traditional underpinning method that has been used for centuries. The method entails extending the old foundation to a stable stratum. The soil beneath the existing foundation is excavated in stages orpins in a controlled manner.

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Answer:

control loop unit

Explanation:

Edmentum/Plato

Specific gravity = 1.67.

The specific gravity of a substance is defined as the ratio of the density of that substance to the density of a reference substance, typically water. Since the weight of a submerged object is reduced by the weight of the fluid it displaces, we can use the difference in weight between the object in air and in water to calculate the volume of water displaced, and hence the density of the object. Dividing the density of the object by the density of water gives the specific gravity. In this case, the specific gravity is (50 N - 30 N) / (50 N - 30 N) = 1.67.

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BadVaddr ($8) stores the memory address at which the exception occurs.

Hence, the exception occurs in store word instruction.

A memory address in computing is a designation of a particular memory location that is used by hardware and software at different levels. Memory addresses are fixed-length digit sequences that are typically represented as unsigned integers and used in operations.

Such a numerical semantic is based on CPU characteristics (such as the instruction pointer and incremental address registers) as well as on the use of memory as an array that is supported by different programming languages.

Numerous memory locations make up the main memory of a digital computer. Physical addresses—which are codes—are assigned to each memory location. To access the appropriate memory location, the CPU (or other device) can use the code.

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The estimate of the amount of work accomplished is called volume load.

Volume load refers to the total amount of weight lifted in a workout session. It takes into account the number of sets, the number of repetitions, and the weight used. Volume load can be used as a measure of the amount of work accomplished. Volume load is also used to monitor progress over time.

In conclusion, the estimate of the amount of work accomplished is called volume load. Volume load is a measure of the amount of work done in a workout session. It can be used to monitor progress over time.

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Note that the Skier's acceleration if friction is near zero is 4.14m/s, while her acceleration if friction is 45.0N is 3.39m/s.

In mechanics, acceleration is defined as the rate of change of an object's velocity with respect to time. Vector quantities are accelerations. The orientation of an object's acceleration is determined by the orientation of its net force.

The change in velocity (v) over the change in time (t) is expressed by the equation a = v/t. This enables you to calculate how quickly velocity varies in meters per second squared (m/s²).

To arrive at the above values, note that we are given:

Mass = 60Kg

Friction = 45N

The formula for acceleration used here is:

a = g x sinθ. where

a = acceleration

g = gravity constant and

Sinθ is the angle of incline.

This is because acceleration is directly proportional to the sine of the incline angle (θ), When sinθ is 1, the angle of the incline is 90°. Incline here accounts for the incline of the skier's body as she descends.

Hence:

a = 9.8 x sin25°

a = 9.8 x 0.422

a = 4.14m/s where friction is negligible.

B)

Where friction is 45.0N, we must use the following formula to account for same:

a = g x sinθ - (f/m);

Where f is friction (45.0N) and

m is mass (60kg)

substituting the values we have:

a = 9.8 x sin 25° - (45/60)

a = 9.8 x 0.422 - 0.75

a = 4.14 - 0.75

a = 3.39 (m/s)

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Answer:

the welding gun liner regulates the shielding gas.

Explanation:

The purpose of the welding gun liner is to properly position the welding wire from the wire feeder till it gets to the nozzle or contact tip of the gun. Regulation of the shielding gas depends on factors such as the speed, current, and type of gas being used. In gas metal arc welding, an electric arc is used to generate heat which melts both the electrode and the workpiece or base metal.

The electric arc produced is shielded from contamination by the shielding gas. The heat generated by the short electric arc is low.

According to the information the systems are: 1. Linear: No, Time-invariant: Yes, Causal: Yes, 2. Linear: Yes, Time-invariant: Yes, Causal: Yes, 3. Linear: No, Time-invariant: Yes, Causal: Yes, 4. Linear: Yes, Time-invariant: Yes, Causal: Yes

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Since the efficiency of the given engine (0.542) is less than the Carnot efficiency (0.743), the engine is not theoretically possible. Therefore, the engine proposed by the vendor is not theoretically possible.

Formula used:Efficiency = W/Qh

Where, Efficiency = (65/120)

Qh = heat energy input

W = useful work done

Qh = 120 Btu (given)

Efficiency = (65/120)

Efficiency = 0.542

Hence, efficiency is 0.542.

Now,Carnot efficiency = (Th - Tl)/Th

Where,Th = temperature of the heat source

Tl = temperature of the heat sink

Tl = 45°F (given)

Th = 175°F (given)

Carnot efficiency = (Th - Tl)/Th

Carnot efficiency = (175 - 45)/175

Carnot efficiency = 0.743

Hence, the Carnot efficiency is 0.743.

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Answer:

a. True

Explanation:

The study of fluids in a state of rest or in motion and the forces involved in it is called fluid mechanics. Fluid mechanics has a wide range of applications in the field of mechanical engineering as well as civil engineering.

When we study the flow of fluid between any two flat plates that is indefinitely flat and is parallel, the flow of the fluid is known as plane Poiseulle flow. The profile of a plane Poiseulle flow is parabolic.

The velocity profile of a plane Poiseulle flow is :

\($\frac{u(y)}{U_{max}}=1-\left(\frac{2y}{h}\right)^2$\)

Thus the answer is TRUE.

Multiple intake and exhaust valves per cylinder, C) Increase volumetric efficiency

Exhaust valves open to allow the release of exhaust gases from the combustion process after ignition has taken place, whereas intake valves open to allow the entry of an air/fuel mixture into the engine's cylinders prior to compression and ignition.

Each cylinder has several intake and exhaust valves, which improves volumetric efficiency.

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At 1.2mpa pressure and 50c

What is pressure?
By pressing a knife against some fruit, one can see a straightforward illustration of pressure. The surface won't be cut if you press the flat part of the knife against the fruit. The force is dispersed over a wide area (low pressure).

a)Mass flow rate of the refrigerant
Therefore h1= condenser inlet enthalpy =278.28KJ/Kg
saturation temperature at 1.2mpa is 46.29C
Therefore the temperature of the condenser

T2 = 46.29C - 5
T2 = 41.29C

Now,
d)power consumed by compressor W = 3.3KW
Q4 = QL + w = Q4
QL = mR(h1-h2)-W
= 0.0498 x (278.26 - 110.19)-3.3
=5.074KW
Hence refrigerator load is 5.74Kg

(COP)r = 238/53
(Cop) = 4.490

Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.

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The tatal resistance of the series-parallel circuit with two resistor connected in parallel which combination is connected in series to a single resistor is 9 ohms.

This can be defined as the opposition to current flow in a circuit.

To calculate the total resistance, first we need to find the total resistance of the parallel resistor.

For parallel,

Where:

R' = Total resistance of the parallel resistor.

From the question,

Given:

Substitute these values into equation 1

Finally, we combine the effective parallel resistance in series to the single resistance to the the total resistance of the circuit.

Where:

From the question,

Substitute these values into equation 2

Hence, the total resistance of the circuit is 9 ohms.

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Spheres come to rest in contact:

- both gray, charges -q and +q

- both orange, charges -q and +q

- both orange, charges +Q and -q

- gray, charge -Q, orange, chargef +q

Spheres come to rest separated

- both gray, +Q and +q

- both gray, -Q and +q

- both orange, -q and -Q

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The weight of the spheres is small enough that electrostatic forces are significant. Spheres come to rest in contact:

- both gray, charges -q and +q

- both orange, charges -q and +q

- both orange, charges +Q and -q

- gray, charge -Q, orange, charge f +q

Spheres come to rest separated

- both gray, +Q and +q

- both gray, -Q and +q

- both orange, -q and -Q

The distance between two charges creates an electrostatic force. The distance between two charges and their respective magnitudes determine the magnitude of the electrostatic force. When two charges, either positive or negative, are brought together, they repel one another.

The phenomena and properties of electric charges that are either stationary or moving slowly are the focus of the physics branch known as electrostatics. Coulomb's law describes electrostatic phenomena, which are caused by the forces that electric charges exert on one another.

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