Ashrae standard 15 -2013 require that each machinery room activate an alarm and mechanical ventillation?

To find the temperature of refrigerant r134a in °C when P = 2.4 bar and U = 257 kJ/kg, we can use the thermodynamic property tables for r134a. First, we need to determine the specific volume of the refrigerant at the given pressure using the tables.

The specific volume at 2.4 bar is 0.0627 m³/kg.
Next, we need to determine the saturation state of the refrigerant by comparing the given specific internal energy (U) to the values in the table. The saturated liquid specific internal energy at 2.4 bar is 189.5 kJ/kg, and the saturated vapor specific internal energy is 979.7 kJ/kg. Since U is greater than the saturated liquid value but less than the saturated vapor value, the refrigerant is in a two-phase region.
Using the quality equation, we can determine the quality of the refrigerant.
x = (U - Uf) / (Ug - Uf) = (257 - 189.5) / (979.7 - 189.5) = 0.096
With the quality known, we can use the tables again to determine the corresponding temperature. At a quality of 0.096 and a pressure of 2.4 bar, the refrigerant temperature is approximately 7.9°C.
Therefore, the temperature of refrigerant r134a in °C when P = 2.4 bar and U = 257 kJ/kg is 7.9°C.

Learn more about volume here

https://brainly.com/question/27535498

#SPJ11

The numerical values for the mesh currents that we have in the question are given as:

We first have to write the KVL

2 - 1(i₁ - i₂) + 3 - 5(i₁ - i₃) = 0

We have to expand the equation that we have above

2 - i₁ + i₂ + 3 - 5i₁ + 5i₃ = 0

take like terms

-i₁ - 5i₁  i₂ + 5i₃ = 5

=  6i₁ - i₂ - 5i₃ = 5

-1(i₂ - i₁) - 6 i₂ - 9(i₃ - i2) = 0

after expanding we would have

i₁ - 16i₂ + 9i₃ = 0------- equation 2

-5 (i3 - i1) - 3 - 9(i3 - i2) - 7i3 = 0

5i1 + 9i2 - 2i3 = 3 ------ equation 3

From the equations that we have in 1, 2 and 3, we would solve the system of equations to get

1i = 0.9892 = 0.9892 ampere

i2 = 0.1501 ampere

i3 = 0.1570 ampere

These are the mesh current that are in the labeled diagram.

Read more on mesh current here:

https://brainly.com/question/28192863

#SPJ1

Answer: Not Enough Time

Often, the deadline date is decided before the project starts and is non-negotiable. This deadline results in a headlong rush to get started on the assumption, the sooner you begin coding, the sooner you'll finish.

A rush to start coding is almost always the wrong approach. It is important to spend the time to create a good design. Not having a good design leads to continuing changes throughout the development phase. When this happens, time and budget are consumed at a rapid rate.

Solution: Make time to create a good design. Don't be tempted to jump straight in and begin coding. Assign time to this task and the rest of the project will run much better. It will improve your reputation when you deliver something that fulfils the customers' expectations and works the first time correctly.

Explanation:

The reasons for a successful and unsuccessful software project is clear objectives and specifications and poor communication between the client and team respectively.

A software project is an entire process of developing software, from gathering requirements to testing and maintenance, carried out in accordance with execution techniques over a predetermined amount of time to produce the desired software output.

Project success is the accomplishment of something wanted, planned, or attempted, while project failure is a "project that fails to execute a duty or. an expected action, non-occurrence, or non-performance." Success is also defined as an action that achieves its intended goal.

Therefore, clear objectives and requirements and inadequate customer and team communication are the causes of successful and failed software projects, respectively.

To learn more about software projects, refer to the link:

https://brainly.com/question/29557260

#SPJ2

In a steel mill, a 1000 lb steel casting at 800°F is quenched by plunging it into a 500-gallon oil bath, which is initially at a temperature of 100°F. We are to determine the final temperature of the oil and steel.

Let the final temperature of the steel be T2 (in °F) and the final temperature of the oil be T3 (in °F).First, let's determine the heat gained by the oil

.= Heat lost by steelmcΔT

= mcΔTWhere

m = mass of steel,

c = specific heat capacity of steel, and

ΔT = change in temperature of steel.(1000 lb) (0.11 Btu/lb.°F) (800°F - T2)

= (500 gal) (8.33 lb/gal) (0.5 Btu/lb.°F) (T3 - 100°F)Simplifying gives:88,000 - 0.11 T2

= 2083.25 (T3 - 100)Divide both sides by 2083.25:0.0422T2 + T3

= 123.7Equation 1Now, let's determine the heat lost by the oil.mc

ΔT = mcΔTWhere

m = mass of oil,

c = specific heat capacity of oil, and

ΔT = change in temperature of oil.(500 gal) (8.33 T2

= 1245°FSubstituting T2 into Equation 1 gives:T3

= 101°FTherefore, the final temperature of the oil is 101°F and the final temperature of the steel is 1245°F.

To know more about quenched visit:
https://brainly.com/question/15708073

#SPJ11

To minimize the maximum absolute value of the bending moment in the beam, the counterweight should be positioned in such a way that it counteracts the effects of the distributed load on the beam.

This can be achieved by placing the counterweight at a location where the moment caused by the distributed load is maximum. The value of the counterweight can be determined by equating the moment due to the distributed load and the moment due to the counterweight. Mathematically, this can be represented as:
\(moment_{distributed load}\) = \(moment_{counterweight}\) Once you have calculated the value of the counterweight, the maximum absolute value of the bending moment (|M|max) can be determined by analyzing the beam's bending moment diagram and finding the point where the bending moment is minimum or maximum.
Please note that to provide a specific answer, more information about the beam, such as its length, material, and the magnitude of the distributed load, is required.

Learn more about moment here: https://brainly.com/question/14140953

#SPJ11

Answer:

True :)

Explanation:

If this is a true or false question.

The discoloration is when the color of a particular thing comes off or changes, fading from its original color. In other words, when the original color of anything changes or wanes off, then that is called discoloration. The statement is true.

This chemical shift occurs for a number of reasons, including its interaction with other elements nearby or the unfavorable effects of other elements it comes into touch with.

Water leaks may create cases of discoloration on walls, surfaces, even ceilings, and pipes. As a result, the surface progressively changes and becomes moist.

Discoloration puts the surrounding region in danger in addition to altering the part(s) or area's look and durability.

Since a change in that region or component is required, the raw material(s) used are wasted. The claim that discoloration results in the waste of raw materials are thus accurate.

Learn more about discoloration here:

brainly.com/question/6378613

#SPJ6

In automobiles, an alternator produces an internal AC (alternating current) that is changed back into DC (direct current) before leaving the alternator.

The alternator in automobiles generates AC, or alternating current, as its internal output. However, since most automotive electrical systems operate on DC, or direct current, the AC output needs to be converted back to DC before leaving the alternator.Alternators are responsible for generating electrical power in vehicles. They convert mechanical energy, supplied by the engine's crankshaft, into electrical energy. The alternator's rotor consists of a coil of wire that rotates within a magnetic field. This rotation induces an alternating current (AC) in the coil.

To utilize this electrical energy, it needs to be converted into direct current (DC), which is the type of electricity used by the various electrical components in an automobile. The AC output from the alternator is rectified, meaning it is changed back into DC. This is achieved through the use of diodes, which allow current flow in only one direction.Once the AC output is rectified, it can be used to charge the vehicle's battery and power the electrical systems. The battery acts as a buffer, storing the electrical energy and providing a steady supply of DC power when the engine is not running.

To know more about direct current visit:

https://brainly.com/question/33435559

#SPJ11

Answer:

After the vehicle is involved in an accident or fire.

After the vehicle is involved in an accident or fire. Therefore option C is correct.

CNG (Compressed Natural Gas) containers in vehicles need to be inspected after the vehicle is involved in an accident or fire. This is because accidents or fires can cause structural damage or compromise the integrity of the CNG container.

It's crucial to assess the container's condition thoroughly after such incidents to ensure there are no leaks or damages that could lead to hazardous situations.

Regular inspections help identify any potential safety risks and ensure that the CNG container remains in a safe and functional state, promoting the overall safety of the vehicle and its occupants.

Inspections after other events like car washes, rain, or parking outside are not necessary for CNG container safety.

Therefore option C is correct.

Know more about CNG:

https://brainly.com/question/33814751

#SPJ7

Answer:

he is the chief officer of crime invistegating department.

Answer:

In both cases, reynolds number is greater than 2000,so the flows can't be laminar.

Explanation:

A) For flow in a tube of uniform diameter, the reynolds number is defined as;

Re = 2ρvr/η

where;

ρ is the fluid density,

v its speed,

η is viscosity

r is the tube radius.

In this question,

We are given;

r = 0.25cm = 0.25 × 10^(-2) m

η of water has a standard value of 1.005 × 10^(-3)

ρ of water has a standard value of 1000 kg/m³

In the reynolds equation, we don't know the velocity. So let's calculate it from;

Q' = vA

Where; Q' is flow rate = 0.5 L/s = 0.0005 m³/s

Area = πr² = π × (0.25 × 10^(-2))²

Area = 1.963 × 10^(-5) m²

So, v = Q/A = 0.0005/(1.963 × 10^(-5)) = 25.5 m/s

So, Re = 2ρvr/η = (2*1000*25.5*0.25 × 10^(-2))/(1.005 × 10^(-3))

Re = 126865.67

Re > 2000 and so the flow is not laminar

B) Now,

radius = 0.9cm = 0.9 × 10^(-2) m

So, A = πr² = π × (0.9 × 10^(-2))²

A = 2.5447 × 10^(-4) m²

v = Q/A = 0.0005/(2.5447 × 10^(-4))

v = 1.965 m/s

Re = 2ρvr/η = (2*1000*1.965*0.9 × 10^(-2))/(1.005 × 10^(-3))

Re = 35194.03

Re > 2000. So flow is not laminar.

here's your answer..

Answer:

True

Explanation:

Principles of plasma arc cutting, Uses a constricting nozzle to create, concentrate,  and direct the high-velocity plasma. Plasma gas is always used

in plasma arc cutting When shielding gas is also used, the process is called dual flow plasma arc cutting. I hope this helps.

Answer:

Explanation:

The situation being described completely fails in regard to the importance of metrology. This is because the main importance of metrology is making sure that all of the measurements in a process are as accurate as possible. This accuracy allows an entire process to function efficiently and without errors. In a food production plant, each individual department of the plant relies on the previous function to have completed their job with the correct and accurate instructions so that they can fulfill their functions correctly and end up with a perfect product. If the oven (like in this scenario) is a couple of degrees off it can cause the product to come out burned or undercooked, which will then get transferred to the next part of production which will also fail due to the failed input (burned or undercooked product). This will ultimately lead to an unusable product at the end of the process and money wasted. Which in a large production plant means thousands of products in a single batch are thrown away.

In terms of the necessity of metrology, the situation stated absolutely fails. This is because metrology's primary goal is to ensure that all measurements in a process are as precise as feasible. This precision allows a whole process to run smoothly and error-free. If the oven temperature is wrong by a few degrees, the product will come out charred or undercooked, and the product will be sent to the next step of the process, which will also fail owing to the failed input. This will result in a useless product and a waste of money at the end of the procedure. In a big manufacturing facility, this means thousands of goods are discarded in a single batch.

A data analyst working on a dataset when begins the transform data phase of analysis will be taking these two actions: one is finding the correlation between data and the other is performing calculations on data. Therefore, options (c) and (d) hold the correct answers.

Data analysis refers to the technique of examing data sets in order to discover trends and build conclusions about the information the data sets contain. The transform phase is a phase data of analysis where a data analyst identifies patterns and relationships between different data sets. For doing so, the data analyst finds correlations between several data sets and performs calculations on them as well.

"

Here is the complete question

A data analyst is working on a dataset and begins the transform data phase of analysis. what are some of the actions that they will take? select all that apply.

a)  Filtering data

b)  Sorting data

c)  Finding a correlation in data

d)  Performing a calculaiton with data

"

You can learn more about  data analysis at

https://brainly.com/question/28070419

#SPJ4

The weather depiction chart is a crucial tool for pilots to gather information about the current weather conditions, assess potential hazards, and make informed decisions before and during the flight.

The weather depiction chart is a valuable tool for pilots as it provides a visual representation of current weather conditions over a wide area. It provides essential information about various weather phenomena that can impact flight safety.

The chart helps pilots to understand the current weather conditions in their flight region. It provides an overview of areas of high and low pressure, fronts, areas of precipitation, cloud cover, and other weather patterns.

Learn more about weather depiction chart, here:

https://brainly.com/question/32509576

#SPJ4

Answer:true

Explanation:

Answer:

(C) She would disagree but also point to some instances where they attempted to show some curiosity about her career.

The actual dimensions for the given nominal dimensions 1x2 stick of lumber, a 2x4 stick of lumber are;

Actual dimension of 1 x 2 stick of lumber = ³/₄'' × 3¹/₂''

Actual dimension of 2 x 4 stick of lumber = 1¹/₂'' × 3¹/₂''

The nominal dimension for a sheet of plywood is; 4' x 8'

Lumber sticks are sticks made from timber in forms used mainly in building construction as formwork support for the sheets of plywood used.

There could also be other uses of lumber sticks like making of some basic home furniture's but they are primarily used in building construction.

Now, Lumber sticks could come in different nominal dimensions such as;

Now, in the question, we are dealing with 1x2 stick of lumber and a 2x4 stick of lumber. From general cutting standards in most workshops, the actual sizes are respectively;

Actual size of 1 x 2 stick of lumber = ³/₄'' × 3¹/₂''

Actual size of 2 x 4 stick of lumber = 1¹/₂'' × 3¹/₂''

Now, for a sheet of plywood, the standard size of a sheet of plywood is 4' × 8'.

Read more about sheet of plywood at; https://brainly.com/question/25678463

Closed cell foam application would be best suited for a flammable liquid spill near a building wall.

Flammable materials are materials that are easily ignited and can quickly burn in the presence of an open flame or spark. Common items that are considered flammable include gasoline, wood, paper, plastic, rubber, and some fabrics. Flammable materials often have a flash point, which is the lowest temperature at which they will combust. In addition, items such as paint, paint thinner, and aerosol cans can also be classified as flammable. It is important to store these materials in designated areas away from open flames or other heat sources.

To know more about Flammable
https://brainly.com/question/28222891
#SPJ4

Answer:

Blissymbols

Explanation:

Blissymbols is a constructed language with hundreds of basic symbols that represent words.

Answer:

Blissymbols

Explanation:

The word problem for y = 2x is as follows.

"If y is the number of cakes produced by using 2 amounts of backing ingredients (x), find the number of cakes produced if x is 25."

A word problem is a mathematical exercise in scientific education in which substantial background information about the subject is conveyed in regular English rather than mathematical notation.

A word problem in mathematics is a math question expressed as one or more sentences that demand students to apply their arithmetic skills to a real-life setting.

This implies that in order to understand the word problem, students must be conversant with the terminology linked with the mathematical symbols to which they are used.

Learn more about word problems:
https://brainly.com/question/2610134
#SPJ1

The fact that Eli plans to set up a recycling program made him choose D. The material he chose is renewable and is much better for the environment.

It should be noted that recycling simply means the process of collecting and processing materials that can be turned into another product.

Therefore, the material he chose is renewable and is much better for the environment and thus influenced his decision.

Learn more about recycling on:

https://brainly.com/question/1152017

a. Versatility b. Attractiveness c. Sustainability

d. Affordability

Versatility is the capacity to adapt to different situations or contexts. It involves having the ability to adjust to changing environments and being able to handle different tasks with ease. Versatility can also be seen in the use of multiple skills, such as being able to switch between different roles or activities as needed. It is an important quality in any job and can be beneficial in many aspects of life. Having versatility can help one to become more flexible and resilient in an ever-changing world.

To learn more about capacity

https://brainly.com/question/29620221

#SPJ4

The thickness of the vessel wall is estimated to be around 29.2 mm.

σ = pr/t

where p is the internal pressure, r is the internal radius of the vessel, and t is the thickness of the vessel wall.

Rearranging for t we get:

t = pr/σ

We can substitute σ from the strain equation into the thickness equation:

t = pr/(E*ε)

The strain ε is the elongation divided by the original length, so ε = 0.012 mm / 20 mm = 0.0006.

The radius r is half of the outer diameter: r = d/2 = 2.0 m / 2 = 1.0 m.

Substituting the known values:

t = (3.510^6 Pa * 1.0 m) / (20010^9 Pa * 0.0006) ≈ 0.0292 m or 29.2 mm.

So, the thickness of the vessel wall is estimated to be around 29.2 mm.

Read more on pressure here:https://brainly.com/question/28012687

#SPJ4

Electric

Answer

Explain

Home safety and security is an electric process as there are some devices that have electric involvement.

The systems in house safety are which consist of sensors and regular cameras or sirens, are armed via way of means of inputting a code at the keypad, the usage of a voice command, urgent a key fob, or doing it via an app.

Electronic protection gadget refers to any digital device that might carry out protection operations like surveillance, get right of entry to manage, alarming or an intrusion manage to a facility or a place which makes use of energy from mains and additionally an energy backup like a batter.

Read more about the Home safety :

https://brainly.com/question/14367881

#SPJ2

In the radio communication system, multipath is the propagation phenomenon that causes diffusion or reflection in multiple different directions of a signal.

Multipath is a propagation mechanism that impacts the propagation of signals in radio communication. Multipath results in the transmission of data to the receiving antenna by two or more paths. Diffusion and reflection are the causes that create multiple paths for the signal to be delivered.

Diffraction occurs when a signal bends around sharp corners; while reflection occurs when a signal impinges on a smooth object. When a signal is received through more than one path because of the diffraction or reflection, it creates phase shifting and interference of the signal.

You can learn more about signal propagation at

https://brainly.com/question/14452898

#SPJ4

Answer:

can you explain how to do this

Explanation:

The one that is not a part of a rack-and-pinion steering system are the pitman arm, idler arm, and center link. The correct option is d. all answers are correct.

Rack and pinion steering employs a gear set to transform the steering wheel's circular motion into the linear motion required to turn the wheels. Tie rods, the shaft, and rack and pinion are the key components of a rack and pinion system.

When the steering wheel is rotated, the shaft transfers the steering wheel's action to the gear. This causes the gear to rotate, which causes the rack to move.

Therefore, the correct option is d. all answers are correct

To learn more about the steering system, refer to the link:

https://brainly.com/question/11210624

#SPJ1

Technical practice incorporates build-time identification of security vulnerabilities in the code is  Penetration testing.

A penetration test, sometimes referred to as a pen test or ethical hacking, is a legitimate simulated cyberattack on a computer system that is carried out to analyze the system's security. This is distinct from a vulnerability assessment.

In order to identify and illustrate the financial effects of a system's vulnerabilities, penetration testers employ the same tools, strategies, and procedures as attackers. Reconnaissance, scanning, vulnerability assessment, exploitation, and reporting are the five stages of a penetration test.

Penetration testing is a technical activity that includes build-time discovery of security vulnerabilities in the code.

Penetration tests are essential to an organization's security because they teach staff members how to respond to any kind of intrusion from a malicious party. Pen tests are a method of determining whether a company's security procedures are actually effective.

To learn more about Penetrating Testing, refer to:

https://brainly.com/question/26555003

#SPJ4