a 0.85-hp motor is required by a ducted fan to produce a 24-in stream of air having a velocity of 40 ft/s. estimate the efficiency of the fan.

The rate of energy that refrigerant-134a enters the compressor of a refrigeration system as saturated vapor at 0.14 mpa, and leaves as superheated vapor at 0.8 mpa and 608c at a rate of 0.06 kg/s is thus 24.072 kJ/s.

First, we need to calculate the enthalpy of saturated vapor at 0.14 mpa. This can be found in a vapor table. The enthalpy of saturated vapor at 0.14 mpa is 272.6 kJ/kg. Next, we need to calculate the enthalpy of superheated vapor at 0.8 mpa and 608C. Again, this can be found in a vapor table. The enthalpy of superheated vapor at 0.8 mpa and 608C is 681.2 kJ/kg.

Now, we can calculate the rate of energy that refrigerant-134a enters the compressor of a refrigeration system. We calculate this by subtracting the enthalpy of saturated vapor (272.6 kJ/kg) from the enthalpy of superheated vapor (681.2 kJ/kg) and multiplying the difference by the rate of flow (0.06 kg/s). The rate of energy that refrigerant-134a enters the compressor of a refrigeration system is thus 24.072 kJ/s.

You can learn more about refrigeration systems at: brainly.com/question/29910871

#SPJ11

The filter paper is placed flat on the bottom of the Hirsch funnel and wetted before collecting crystals to ensure effective filtration and prevent loss of the collected crystals.

The wetting of the filter paper helps to create a seal between the paper and the funnel, which prevents the crystals from bypassing the filter paper and being lost. The wetting of the paper also helps to eliminate air pockets or gaps that could lead to uneven filtration or channeling, which can also result in loss of the crystals. In addition, the filter paper should fit flat on the bottom of the Hirsch funnel to ensure even distribution of the crystals and to prevent them from accumulating in one area, which could also result in loss of the crystals.

Learn more about Hirsch funnel: https://brainly.com/question/30648758

#SPJ11

The correct answer is To determine the minimum size of the THHN copper feeder tap conductor, we need to calculate the ampacity of the tap conductor based on the 75-degree Celsius column of the NEC table 310.16.

First, we need to find the equivalent ampacity of the 225A main breaker panelboard. Since it is a continuous load, we have to multiply it by 1.25. So, 225A x 1.25 = 281.25A. Next, we need to find the percentage of the feeder ampacity required for the tap conductor. The NEC table 310.16 allows tap conductors to have an ampacity not less than one-third of the rating of the overcurrent device protecting the feeder. Therefore, 1200A/3 = 400A. Finally, we can calculate the minimum size THHN copper feeder tap conductor using the following formula: Minimum conductor ampacity = (281.25A - 180A) + 180A = 281.25A Minimum conductor ampacity = 281.25A / 0.8 (derating factor) = 351.56A From the NEC table 310.16, the minimum size THHN copper conductor with an ampacity of 351.56A is 2/0 AWG. Therefore, the minimum size THHN copper feeder tap conductor that can be used is 2/0 AWG.

To learn more about  minimum size click on the link below:

brainly.com/question/29727023

#SPJ1

The largest torque that can be applied at point A without exceeding the allowable shear stress for either rod is T=44.99 k-in.

The largest torque that can be applied at point A can be determined by using the equation for shear stress of a shaft:
τ=T/J
where τ is the shear stress, T is the applied torque, and J is the polar second moment of inertia.

For the 1.5-in.-diameter steel rod AB:
J=(π/32)D4
where D is the diameter of the rod, so for a 1.5-in. rod, J=(π/32)(1.5)4=3.704 in4.

So, the largest torque that can be applied at point A while maintaining a shear stress of 15 ksi is T=(15 ksi)(3.704 in4)=55.56 k-in.

For the 1.8-in.-diameter brass rod BC:
J=(π/32)D4
where D is the diameter of the rod, so for a 1.8-in. rod, J=(π/32)(1.8)4=5.848 in4.

So, the largest torque that can be applied at point A while maintaining a shear stress of 7.7 ksi is T=(7.7 ksi)(5.848 in4)=44.99 k-in.

Therefore, the answer is T=44.99 k-in.

Learn more about torque : https://brainly.com/question/20691242

#SPJ11

The best additive to use to try to minimize the whining noise in a 1956 Chevy Powerglide transmission is Automatic Transmission Additive.

There are many reasons why Automatic Transmission Additive is the best additive to use to try to minimize the whining noise in a 1956 Chevy Powerglide transmission, including but not limited to:ATFs (automatic transmission fluids) are low viscosity lubricants that are formulated to protect automatic transmissions and provide smooth shifting. ATFs, however, have a variety of drawbacks. For example, they can foam, oxidize, shear, and run too hot, all of which can contribute to transmission noise, slipping, and poor shifting.Automatic transmission additives, on the other hand, have been designed to overcome these limitations by incorporating special friction modifiers, anti-wear agents, and seal conditioners, among other ingredients. These additives can reduce friction and wear in the transmission, which can help to quiet down noise and reduce vibration.

Learn more about Automatic Transmission Additive: https://brainly.com/question/14646065

#SPJ11

Answer:

Increasing the flow tube radius caused flow rate to increase and resistance to decrease. To maintain the same pressure, the pump rate had to increase as well.

The question at hand is: Examine the following Entity and decide which rule of Normal Form is being violated:

ENTITY: CLIENTATTRIBUTES:# CLIENT IDFIRST NAMELAST NAMESTREETCITYZIP CODE. The entity "CLIENT" violates the third rule of normal form (3NF). This rule states that all attributes must be functionally dependent on the primary key. In this case, the primary key is CLIENT ID, but the attributes FIRST NAME, LAST NAME, STREET, CITY, and ZIP CODE are not functionally dependent on it. To be in 3NF, each of these attributes would need to be related to CLIENT ID in such a way that they could not be determined by any other attribute.

For example, a separate entity for ADDRESS could be created with STREET, CITY, and ZIP CODE as attributes, and then related to the CLIENT entity through a foreign key.

To learn more about Entity attributes : https://brainly.com/question/13438918

#SPJ11

The owner of a building designed by registered engineers and architects may not be able to recover damages from snow and ice if the engineers and architects had specified the use of materials or building techniques that are not designed to handle those types of conditions.

Additionally, the owner may not have taken proper preventative measures to ensure the building was properly insulated and protected from the weather, or the owner may not have maintained the building appropriately. Finally, the owner may not have been able to prove negligence on the part of the engineers or architects in the building's design or construction.

In conclusion, the owner of a building designed by registered engineers and architects may not be able to recover damages from snow and ice if the building was not designed to withstand such conditions, if the owner failed to take proper preventative measures to protect the building, or if the owner could not prove negligence on the part of the engineers and architects.

You can learn more about building design at: brainly.com/question/8741590

#SPJ11

Land surveying is the era used to gather records additionally a part of geomatics. but geomatics is a technology to discover ways to analysis that survey geospatial facts through diverse approach and making out a selection via it.

Land Surveying (or Engineering Surveying) is in truth a sub-area of Geomatics. however, in practice, there may be little to no distinction between the disciplines and the phrases get used interchangeably often.
A Geomatics engineer will employ sensors, knowledge and software to provide notably correct positional information for any of these scenarios.
Surveyors make specific measurements to decide belongings boundaries. They provide information applicable to the form and contour of the Earth's floor for engineering, mapmaking, and creation initiatives.

To know more about land surveying click on right here
brainly.com/question/29841451
#SPJ4

When welding with the GTaw process on aluminum, a typical amount of the AC sine wave that should be spent cleaning the material is between 40 and 60%. This will help to ensure a clean and porosity-free weld.

The GTaw (Gas Tungsten Arc Welding) process is an arc welding technique that is commonly used on aluminum materials. When using this process, a typical amount of the AC sine wave that is used for cleaning the material is between 40 and 60%. This is because a lower amperage (around 40A) is used when cleaning the aluminum before welding. This is done to remove any oxide film that may have formed on the surface of the aluminum.

To clean the aluminum, the welder should first use a wire brush to remove any dirt, grease, and rust from the surface of the aluminum. Then the welder should set the current between 40 and 60% of the maximum current on the welding machine. This will help to remove any oxide film on the aluminum material that could cause porosity in the weld. Once the oxide is removed, the welder can increase the current to the recommended level for welding.

You can learn more about welding at: brainly.com/question/29654991

#SPJ11

The "recovery" stage is the time during annealing when there is little change in ductility and yield strength but usually a significant change in electrical conductivity and corrosion resistance.

The metal is heated to a certain temperature during the annealing process so that recrystallization can take place. Any flaws brought on by the metal's deformation are now fixed. After maintaining that temperature for a predetermined amount of time, the metal is cooled to room temperature.

The physical and occasionally chemical qualities of a material are altered during the annealing process, which increases ductility and decreases hardness to make a material more workable.

To know more about annealing process visit:-

https://brainly.com/question/29699923

#SPJ1

The statement "For load-bearing applications, engineered materials are selected by matching their mechanical properties to the component's design specifications and service conditions" is true because when selecting materials for load-bearing applications, one must consider the mechanical properties of those materials.

A load-bearing structure is a structure designed to carry the weight of the building or any other construction's imposed loads (people or objects). Such structures must be capable of holding the loads applied to them without failing (or cracking) under the pressure.

The mechanical properties of materials are used to determine which materials are best suited for bearing loads. A material's ability to sustain external forces without cracking, breaking, or otherwise failing is known as its mechanical properties.

Engineering materials are frequently employed in load-bearing applications. Therefore, when selecting materials for load-bearing applications, one must consider the mechanical properties of those materials.

Learn more about "mechanical properties" at: https://brainly.com/question/19429265

#SPJ11

Answer:

Using the Manning's Equation, the discharge rate can be calculated as follows:

Q = (1.49/n) x A x R^(2/3) x S^(1/2)

Where:

Q = discharge rate (m^3/sec)

n = Manning's roughness coefficient (0.011)

A = cross sectional area of the ditch (2m x 0.5m = 1 m^2)

R = hydraulic radius (half the width of the ditch, or 1 m)

S = slope of the ditch (0.0009)

Q = (1.49/0.011) x 1m^2 x 1m^(2/3) x 0.0009^(1/2)

Q = 13,636.36 m^3/sec

The maximum voltage gain at 7 kHz input signal frequency is Voltage Gain = Output Voltage/Input Voltage.

At 1.8 MHz, the unity gain of an amplifier circuit occurs, meaning that the voltage gain of the circuit is 1. At 7 kHz, the maximum voltage gain of the amplifier circuit will be different. To calculate the maximum voltage gain at 7 kHz, need to determine the voltage gain at that frequency.

The voltage gain of the amplifier circuit at 7 kHz is calculated using the formula Voltage Gain = Output Voltage/Input Voltage. The voltage gain at 7 kHz can then be determined by plugging in the known values and solving for the output voltage.

Learn more about Voltage Gain : https://brainly.com/question/15303426

#SPJ11

By measuring the activity of a sample over time, the manganese content of stainless steel can be verified.

The manganese content of certain stainless steel can be verified by an activation measurement. Activation measurements measure the activity induced in a sample by neutron capture during a specific time period. Activity is given by the equation A = N0e-λt, where N0 is the initial number of atoms, e is Euler's number (2.718...), λ is the decay constant, and t is time. In this equation, A is the activity at a time t and N0 is the initial number of atoms. The decay constant λ indicates the probability of a neutron capture reaction and is dependent on the material's manganese content.

You can learn more about manganese content at: brainly.com/question/29437774

#SPJ11

Signal B has a strength of 20 dB - 20 dB = 40 dB. Signal B is 200 times more powerful than Signal A, which means that Signal B is 20 dB (or 200 times) greater than Signal A.

To calculate the strength of Signal B in dB, we first need to calculate the ratio of Signal B's power to Signal A's power, which is 200:1. We then need to convert this ratio to dB, which is 20 dB (or 200 times). To do this, we simply take the logarithm of the ratio, which is 20 dB (or 200 times). Therefore, Signal B has a strength of 40 dB. This is calculated by subtracting 20 dB (or 200 times) from Signal A's strength of -20 dB.

To sum up, Signal B has a strength of 40 dB, which is 20 dB (or 200 times) greater than Signal A's strength of -20 dB. This can be calculated by taking the logarithm of the ratio of Signal B's power to Signal A's power, which is 200:1.

You can learn more about signals at: brainly.com/question/14699772

#SPJ11

Force in all its members have increased

The vector product of mass (m) and acceleration (a) expresses the quantity of force (a). The force equation or formula can be expressed mathematically as follows:

F = ma In which case,

m = mass a = velocity

It is expressed in Newtons (N) or kilogrammes per second.

The acceleration an is provided by

a = v/t

Where

v = acceleration

t = time spent

As a result, Force can be expressed as follows:

F = mv/t

The formula for inertia is p = mv, which can also be expressed as Momentum.

As a result, force can be defined as the rate of change of momentum.

dp/dt = F = p/t

Force formulas are useful for determining the force, mass, acceleration, momentum, and velocity in any given problem.

To know more about Force,click on the link :

https://brainly.com/question/13191643

#SPJ1

Decomposition is the process of breaking the Work Breakdown Structure (WBS) into smaller and smaller deliverables. This process is also sometimes referred to as value engineering or detailed specifications. By decomposing the WBS into smaller pieces, it becomes easier to assign tasks, assign costs, and plan out timelines.

The decomposition process begins by taking the major deliverables of the project and breaking them down into smaller tasks. From there, each task is further broken down into even more specific tasks. This process is repeated until all tasks have been broken down into their smallest components.

The purpose of decomposition is to create a well-defined scope of the project so that it can be managed in an efficient manner. It allows managers to easily identify the resources, cost, and timeline of each task, as well as provide a way to evaluate the progress of each task. It also allows for better control of the overall project.

Decomposition is a critical part of the project management process, as it ensures the project is organized and defined. This ultimately leads to an overall better result for the customer.

You can learn more about Decomposition at: brainly.com/question/8009068

#SPJ11

The diversity principles include equity, inclusion, diversity, intersectionality, and cultural competency.

However, some common diversity principles that are often discussed include:

To learn more about diversity principles:

https://brainly.com/question/11541955

#SPJ11

The unit headloss expected in a 16-in diameter PVC pipeline with C=130 and 2700 gpm flow rate is 4 ft/1000 ft. Option B is correct.

Using the Hazen-Williams equation, the unit headloss can be calculated as:

hL = 10.67 * (L/D) * (Q/C)^{1.852}

where:

L = 1000 ft (assumed length)

D = 16 in = 1.333 ft (pipe diameter)

Q = 2700 gpm = 6.439 ft³/s (flow rate)

C = 130 (Hazen-Williams coefficient for PVC)

Substitutingin the values and solving for hL, we get:

hL = 10.67 * (1000/1.333) * (6.439/130)^{1.852}

= 4.04 ft/1000 ft

Rounding to two decimal places, the unit headloss is 4 ft/1000 ft, which corresponds to answer choice b.

To practice more questions about Hazen-Williams:

https://brainly.com/question/23855649

#SPJ11

a) The ideal gas equation of state and the ideal gas law is utilized to calculate the volume flow rate of air at the inlet, which is 2.73 cubic meters per second. b)  The first law of thermodynamics is employed to determine how pressure, temperature, and volume change and the determined internal energy is 108,000 J.

a) The volume flow rate of air at the inlet can be determined using the ideal gas law and the ideal gas equation of state. The equation is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Using the given values, we can determine the volume flow rate (V) to be 2.73 cubic meters per second.

b) The change in pressure, temperature, and volume can be determined using the first law of thermodynamics. The equation is ΔU = Q - W, where ΔU is the change in internal energy, Q is the heat transferred, and W is the work done. Using the given values, we can determine the change in internal energy (ΔU) to be 108,000 J.

You can learn more about the ideal gas equation at: brainly.com/question/28837405

#SPJ11

In this case, the question is: "is represented by a set of / data fields / variables (also known as properties or attributes) with their current value. it is is called____"

The answer is: An object is represented by a set of data fields or variables (also known as properties or attributes) with their current value. It is called an object.

What is an object?

An object is an instance of a class in object-oriented programming. It is a software bundle of variables and related methods. An object is defined by its class, which determines its attributes (properties or variables) and methods (functions). An object is an instance of a class that has its own identity, state, and behavior.

The state of an object is represented by its attributes, while its behavior is represented by its methods. Therefore, an object is represented by a set of data fields or variables (also known as properties or attributes) with their current value, and it is called an object.

To learn more about  object-oriented programming : https://brainly.com/question/3522354

#SPJ11

a) Program B has the better guarantee on the running time, for large values of N (N>10,000).

b) Program A has the better guarantee on the running time, for small values of N (N<100)

.c) Which program will run faster on average for N=1,000 cannot be determined from the given information.

d) It is possible that program B will run faster than program A on all possible inputs.Explanation:

a) For large values of N (N>10,000), Program B has a worst-case running time of N log N which is better than the running time of program A which is 150N log N. Hence, program B has the better guarantee on the running time.

b) For small values of N (N<100), Program A has a worst-case running time of 150N log N which is better than the running time of program B which is N. Hence, program A has the better guarantee on the running time.

c) The average running time of the programs for N=1000 cannot be determined from the given information.

d) It is possible that program B will run faster than program A on all possible inputs. It depends on the input, so it is not possible to make a general statement regarding which program is faster on all possible inputs.

You can read more about program at https://brainly.com/question/23275071

#SPJ11

The building envelope is an essential component of any structure, providing a protective barrier between the interior and exterior of the building. By controlling the flow of air, moisture, and heat, the building envelope ensures the indoor air quality and energy efficiency of the building.

The components of the building envelope include the walls, roofs, windows, doors, and foundation of the building, as well as insulation and other materials. The primary purpose of the building envelope is to provide a protective barrier against the elements, ensuring the interior of the building is insulated from the outside climate. The building envelope also helps to maintain indoor air quality, as it reduces the amount of air infiltration from outside. In addition, the building envelope increases the efficiency of the building’s heating and cooling systems, reducing energy consumption and costs.

In order to maintain its protective barrier, the building envelope must be constructed with durable and weather-resistant materials. Additionally, the building envelope should be properly sealed to reduce air leakage. Windows and doors should be designed to minimize the risk of water infiltration, while insulation should be installed to reduce heat transfer.
You can learn more about building envelopes at: brainly.com/question/28163927

#SPJ11

To determine the distance that the crate slides relative to the platform, we can use the principle of conservation of linear momentum and the work-energy principle. Here are the steps:

1. First, we need to find the initial velocity of the platform (v_platform_initial). Since the platform is initially at rest, its initial velocity is 0 ft/s.

2. Apply the conservation of linear momentum to the system (crate + platform) before and after the collision:

m_crate * v0 + m_platform * v_platform_initial = (m_crate + m_platform) * v

where m_crate = 200 lb, m_platform = 700 lb, and v = 2.667 ft/s.

3. Solve for the initial velocity of the crate relative to the platform (v_crate_initial_relative):

v_crate_initial_relative = v0 - v = 12 ft/s - 2.667 ft/s = 9.333 ft/s

4. Use the work-energy principle to relate the initial and final kinetic energies of the crate and the work done by friction:

(1/2) * m_crate * v_crate_initial_relative^2 - f_friction * d = 0

where f_friction = μ * m_crate * g, μ = 0.25 (coefficient of kinetic friction), g = 32.2 ft/s^2 (acceleration due to gravity), and d is the distance slid.

5. Solve for the distance (d):

(1/2) * 200 * (9.333)^2 - 0.25 * 200 * 32.2 * d = 0

6. Solve for d:

d = (1/2) * 200 * (9.333)^2 / (0.25 * 200 * 32.2) ≈ 13.49 ft

So the distance that the crate slides relative to the platform is approximately 13.49 ft.

To learn more about platform crate : https://brainly.com/question/2835751

#SPJ11

The plant will need to perform 9,100,000 processing and assembly procedures altogether.

Shape operations, property-enhancing operations, and surface processing operations are the three distinct categories of processing operations. By using mechanical force, heat, or other forms and combinations of energy, shaping operations change the work material's geometry.

There are 250 components in each product.

Parts purchased as a percentage equal 65%.

250 - (65% x 250) = 87.5 is the number of components that will be produced in the new facility.

Eight processing steps are needed to manufacture each component.

The new factory's processing procedures per component totaled 8 x 87.5, or 700.

13 x 1000 x (700 + 1) = 9,100,000 is the total number of processing and assembly procedures needed for the 13 different models.

To know more about assembly visit:-

https://brainly.com/question/13557244

#SPJ1

The "wordlist.zip" zip archive is created using this script, which also adds each word from the "wordlist.txt" file as a distinct file. To prevent compression, the compression type is set to ZIP STORED.

The "default password to extract encrypted files" is set using setpassword. The documentation states at the very top: "It presently cannot produce an encrypted file, but it supports decryption of encrypted data in ZIP packages." Try using a software like pyminizip to build a ZIP file that is password-protected.

open a zip file

# Change the dictionary file's name to "wordlist.txt" in the dictionary file setting.

# Set the output zip file's name to "wordlist.zip" in the output zip file setting.

# Change the zip file's password to zip password = "mysecret"

# Use zipfile to create a new zip file that is password-protected.

Using ZipFile(output zip file, mode="w", compression="zipfile.ZIP DEFLATED," allowZip64="True") as myzip

# Use open(dictionary file, "r") as f: for line in f: to open the dictionary file and read its contents line by line.

# Append every word as a separate file, without compression, to the zip file.

line.strip(), compress type=zipfile.ZIP STORED, myzip.writestr

Set a password for the zip file using the following command: myzip.setpassword(bytes(zip password, 'utf-8')).

To know more about wordlist zip visit:-

https://brainly.com/question/30653883

#SPJ1

CNC machining equipment allows companies to manufacture complex parts with a user-friendly, single-setup machining process. This structure offers significant productivity advantages — cutting labor costs, increasing part quality, and reducing work time.

The Isentropic efficiency of the compressor Let's consider the given parameters; Initial conditions: T1 = 290 kP1 = 90 kPa Final conditions: T2 = 480 kP2 = 390 kPa The isentropic efficiency of the compressor can be calculated using the following formula:ηs = (h2s - h1) / (h2 - h1)Whereηs = Isentropic efficiency of the compressorh1 = Enthalpy at the inlet of the compressorh2 = Enthalpy at the outlet of the compressorh2s = Isentropic enthalpy at the outlet of the compressor.

Now let's calculate the enthalpies; From the given conditions, we can find out the state point of the air at the inlet of the compressor using the steam tables: At P1 = 90 kPa, T1 = 290 K Using the steam tables, we find out h1 = 315.83 kJ/kg Similarly, we can find out the state point of the air at the outlet of the compressor using the steam tables: At P2 = 390 kPa, T2 = 480 K Using the steam tables, we find out h2 = 421.45 kJ/kg Now, let's calculate the isentropic enthalpy at the outlet of the compressor: Using the steam tables, we can find out the state point of the air at the outlet of the compressor if it were isentropic. At P2 = 390 kPa and S1 = S2Using the steam tables, we find out h2s = 455.41 kJ/kg Substituting these values in the isentropic efficiency formula, we get;ηs = (h2s - h1) / (h2 - h1)ηs = (455.41 - 315.83) / (421.45 - 315.83)ηs = 0.72Thus, the isentropic efficiency of the compressor is 72%.

for more such questions on parameters.

https://brainly.com/question/30380032

#SPJ11