What respiratory system changes occur when someone quits smoking? (I point) O Cilia always function abnormally. OTar in the air passages dissolves. O Cilia regain normal function. O Tar continues to form

Answers

Answer 1

One of the changes that occur in the respiratory system when someone quits smoking is that the C, cilia regain their normal function.

What are cilia?

Cilia are small hair-like structures that line the airways and help to move mucus and debris out of the lungs. Smoking can damage the cilia and reduce their ability to function properly, leading to a buildup of mucus and other harmful particles in the lungs.

Another change that occurs when someone quits smoking is that the tar in the air passages begins to dissolve. Tar is a sticky substance that is produced when tobacco is burned, and it can accumulate in the airways of smokers. When someone quits smoking, their body begins to break down and remove the tar that has built up in their lungs, which can help to improve their lung function over time.

Learn more on cilia here: https://brainly.com/question/23275700

#SPJ1


Related Questions

How can you use the academic language of fitness to help you become healthy and active for a lifetime?

Answers

Answer:

You can use it to talk to people if they speak different languages.

Explanation:

You get active cause you're learning something new and It's helping you learn more ways to speak. I hope this helps you.

Guam ranks 5th in the nation for CHLAMYDIA.

What are some suggestions to make STD testing accessible for sexually active teens?
REMEMBER: 3 paragraphs
Intro (3)
Body (5)
Conclusion (3)

please help me please help me

Answers

Introduction:

Sexually transmitted diseases (STDs) are a significant public health concern, particularly among young people. Many teens are sexually active, but may not have easy access to testing for STDs. This can lead to undiagnosed and untreated infections, which can have serious health consequences. In Guam, the high rate of chlamydia highlights the need for accessible testing and education for sexually active teens. In this essay, we will explore some suggestions to make STD testing more accessible to sexually active teens.

Body:

Increase the availability of testing services: One way to make STD testing more accessible for teens is to increase the availability of testing services. This could include offering testing at schools, community centers, or other youth-friendly locations. It could also involve expanding the hours and days that testing services are available to accommodate busy schedules.

Reduce the stigma around testing: Many teens may be reluctant to seek STD testing due to the stigma associated with sexually transmitted infections. By reducing this stigma, we can make it easier for teens to access testing services without feeling embarrassed or ashamed. This could involve education campaigns that emphasize the importance of testing, as well as destigmatizing language and messaging around STDs.

Provide education and resources: In addition to testing services, it's important to provide education and resources to help sexually active teens make informed decisions about their sexual health. This could include providing information about safe sex practices, the importance of testing, and how to access testing services. It could also involve providing resources like condoms and other barrier methods to help prevent the spread of STDs.

Conclusion:

In conclusion, the high rate of chlamydia in Guam highlights the need for accessible STD testing for sexually active teens. By increasing the availability of testing services, reducing the stigma around testing, and providing education and resources, we can help ensure that teens have the information and support they need to protect their sexual health.

What is a health risk associated with secondhand smoke exposure to infants and children? a. asthma attacks b. pink eye c. skin irritation d. tonsillitis

Answers

A. Asthma attacks as babies suffer through the smoke their lungs get irritated which can cause life long suffering

2. 01 studying development.
what did the study find about nature (genetics) and monozygotic vs. Dizygotic twins?

Answers

The study found that genetics, or nature, plays a greater role in the similarities of monozygotic (identical) twins compared to dizygotic (fraternal) twins.

Monozygotic twins come from a single fertilized egg that splits into two, while dizygotic twins come from two separate eggs fertilized by two separate sperm. The study found that monozygotic twins have a higher degree of genetic similarity, which leads to a greater degree of physical and behavioral resemblance than dizygotic twins. This suggests that genetics play a larger role in the similarities and differences between individuals than environmental factors.

The study also found that monozygotic twins have a higher concordance rate for certain traits and conditions, such as intelligence, height, and schizophrenia, than dizygotic twins. This further supports the idea that genetics play a significant role in the development of these traits and conditions.

Overall, the study provides strong evidence that genetics play a key role in shaping an individual's physical and behavioral characteristics, and that monozygotic twins provide a valuable model for studying the influence of genetics on human development and behavior.

To know more about the Monozygotic, here

https://brainly.com/question/14250130

#SPJ4

________ are friendly, lowering cholesterol levels are reducing the risk of heart disease, but ________ can be unhealthy if overeaten.
A) Carbohydrates; proteins
B) Proteins; carbohydrates
C)Saturated fats; unsaturated fats
D) Unsaturated fats; saturated fats

Answers

D) Unsaturated fats; saturated fats

Heart disease is a condition that occurs when the heart's blood vessels become narrow or blocked, which can lead to chest pain, heart attack, or stroke. Elevated levels of cholesterol in the blood are a major contributor to the development of heart disease. LDL (low-density lipoprotein) cholesterol, which is often referred to as "bad" cholesterol, can build up in the walls of blood vessels, leading to the formation of plaque. Saturated fats, which are commonly found in animal products, can raise LDL cholesterol levels and increase the risk of heart disease. In contrast, unsaturated fats, which are found in plant-based foods and fatty fish, can help to lower cholesterol levels and reduce the risk of heart disease. Additionally, regular physical activity, maintaining a healthy weight, and not smoking are all important factors in reducing the risk of heart disease.

Learn more about  heart disease here:

https://brainly.com/question/1347334

#SPJ1

What are you doing to ensure that you have a balanced mental health and bringing wellness into your life? What do you do to balance and center yourself? How can you play a more personal role in making choices that allow you to live with a clear conscious and mind?

Answers

I practice conscious decision-making, asking myself if a decision will bring me closer to my goals and values.

What is conscious?

Consciousness is the state of being aware and having self-awareness. It is the ability to perceive, feel and think. It involves the recognition of one's own thoughts and feelings, as well as the ability to recognize the thoughts and feelings of others. Consciousness is a complex phenomenon that has intrigued scientists, philosophers, and theologians for centuries.

I make sure to set aside time each day for self-care, such as taking a walk, reading a book, or meditating.

I practice mindful eating, making sure to nourish my body with healthy, nourishing foods.

I practice gratitude and appreciation each day, writing down what I am thankful for in my life.

I make sure to get enough sleep, preferably 7-9 hours per night.

I exercise regularly, doing activities that I enjoy such as running, yoga, or strength training.

I stay connected to my spiritual practice, and take time to reflect, pray, or meditate each day.

I practice positive self-talk, reminding myself that I am capable and strong.

I make time to spend with family and friends, and to be present in the moment when I am with them.

I make sure to take time for myself to do something I enjoy, such as taking a hot bath or going for a walk.

To learn more about conscious

https://brainly.com/question/17592002

#SPJ1

What do plant, animal and bacteria cells have in common?

A) cell walls, cytoplasm and endoplasmic reticulum
B) DNA, chloroplasts and cytoplasm
C) cell membranes, DNA and lysosomes
D) DNA, cytoplasm and cell membranes

Answers

Answer: D) DNA, cytoplasm, and cell membranes

Explanation:

Plant and animal cells are considered to be eukaryotic cells, meaning they have a nucleus and membrane bound organelles. On the other hand, bacteria is a type of prokaryotic cell, which is the opposite of a eukaryotic cell, lacking a nucleus and membrane bound organelles. There are, however, things all of these cells have in common. Firstly, all cells have a cell membrane to maintain homeostasis. All cells also contain DNA for replication. Lastly, all cells contain cytoplasm, a jelly like substance which holds all components of a cell.

Answer:

D) DNA, cytoplasm, and cell membranes

Explanation:

Is practicing a sport still playing the sport? I need to settle this argument once and for all.

Answers

Answer:

Yes

Explanation:

It is cause your practicing the sport and playing it at the same time.

People teach you to play the sport while they help you practice.

Which of the following describes the levels of structural organization approach to studying the human body?

Answers

Answer:

I don't see the options but it is CELL—>TISSUE —>ORGAN—>SYSTEM—>ORGANISM

Which of the following does NOT describe a possible benefit of a healthy diet?

Alisha does not catch the flu when several of her friends get sick.
Billy is able to run longer distances at his track meets.
Rodrigo is four inches taller than most of his classmates at school.
Scarlett sprains her ankle but heals faster than the average time.

PLEASE HELPPP!! I CAN'T GET IT WRONG

Answers

Answer:

Rodrigo is four inches taller than most of his classmates at school does NOT describe a possible benefit of a healthy diet. MAYBEEEE

Explanation:

Rodrigo is four inches taller than most of his classmates at school

Multiple Choice
What type of venue is most likely to offer massage with an emphasis on promoting rest and relaxation rather than healing, but may also have
therapeutic mineral springs?
a fitness center
a long-term care facility
a salon
O a spa

Answers

The type of venue that offers the mentioned services would be a spa.

What is a spa?

A spa is a facility that offers a range of treatments, services and facilities for relaxation, health, and wellness.

It typically includes services such as massages, facials, body treatments, saunas, steam rooms, whirlpools, and more. Some spas may also offer fitness classes, healthy meals, and accommodations for overnight stays.

Thus, a spa is most likely to offer massage with an emphasis on promoting rest and relaxation rather than healing, but may also have therapeutic mineral springs.

More on spas can be found here: https://brainly.com/question/14431521

#SPJ1

What do you still wonder about how substances form?

Answers

New compounds are produced during a chemical reaction. When two substances' chemical bonds break, the atoms that make up those substances separate and rearrange themselves to form new substances.

What different shapes do chemicals take?

There are two different types of pure substances: elements and compounds. One particular type of atom makes up each element, whether it exists on its own or as part of a molecule. Compounds are molecules made up of two simpler things than molecules.

What causes compounds to change their form?

When matter loses or absorbs energy, it changes states. When a substance absorbs energy, the molecules and atoms travel more quickly, and the extra kinetic energy pushes the particles far enough to cause a change in shape.

To learn more about formation of new substances visit:

brainly.com/question/4281156

#SPJ1

Need some help with navigating the Human Body

Answers

Bile cannot accumulate in the absence of the gallbladder. Instead, bile is directly released by your liver into your small intestine. You can still digest most foods because of this.

Without a gallbladder, how do you survive?

Without a gallbladder, you can still live a perfectly normal existence. The amount of bile produced by your liver to digest meals will still be sufficient, but instead of being held in the gallbladder, it will trickle continually into your digestive tract.

What are the consequences of gallbladder removal?

Special clips are used to close the tube that connects the gallbladder to the main bile duct when the gallbladder is removed. Yet, once the gallbladder is removed, bile fluid can occasionally flow out into the stomach (abdomen).

To know more about gallbladder visit:-

brainly.com/question/14309457

#SPJ1

Which answer best describes the greenhouse effect?


A O The greenhouse effect occurs because short wave radiation from the earth is trapped by carbon dioxide and water vapor in the atmosphere creating a warming of the earth and the atmosphere.

B O The greenhouse effect occurs because long wave radiation from the earth is trapped by carbon dioxide and water vapor in the atmosphere creating a warming of the earth and the atmosphere.

C O The greenhouse effect occurs because short wave radiation from the sun is trapped by carbon dioxide and water vapor in the atmosphere creating a warming of the earth and the atmosphere.

D O The greenhouse effect occurs because long wave radiation from the sun is trapped by carbon dioxide and water vapor in the atmosphere creating a warming of the earth and the atmosphere.


I don't need explanation just answer please :D

sorry I didn't pick the right subject I don't know what it should be.

Answers

Answer:

B O The greenhouse effect occurs because long wave radiation from the earth is trapped by carbon dioxide and water vapor in the atmosphere creating a warming of the earth and the atmosphere.

write a poster about informing the people on the leading causes of morbidity and mortality and how to prevent them.

must contain the following:
description of the disease
causes of the desease
mortality rate
morbidity rate

Answers

Answer:Title: Leading Causes of Morbidity and Mortality: Preventable Strategies for a Healthier You

Description of the Disease: Many of the leading causes of morbidity and mortality are preventable through healthy lifestyle choices and preventative measures. These diseases can greatly impact one's quality of life and may even lead to death if left untreated.

Causes of the Disease: The main causes of these preventable diseases include unhealthy behaviors such as smoking, excessive alcohol consumption, lack of physical activity, and poor diet. Other factors such as environmental pollution, genetic predisposition, and access to healthcare can also contribute to the development of these diseases.

Mortality Rate: Mortality rate refers to the number of deaths caused by a specific disease or condition within a given population. In the case of preventable diseases, mortality rates can be significantly reduced by early detection and prompt treatment. Failure to address these diseases can lead to increased mortality rates.

Morbidity Rate: Morbidity rate refers to the number of individuals affected by a specific disease or condition within a given population. Preventable diseases can lead to significant morbidity rates, causing individuals to experience chronic pain, disability, and reduced quality of life.

Preventive Strategies: Preventing these diseases requires a holistic approach, including lifestyle changes, regular check-ups, and access to preventative healthcare services. Here are some effective preventive strategies:

Avoid smoking and excessive alcohol consumption

Follow a healthy diet and maintain a healthy weight

Engage in regular physical activity

Get regular check-ups and screenings for early detection and treatment of diseases

Stay up to date with vaccinations

Practice good hygiene to prevent the spread of infectious diseases

Protect yourself from environmental hazards such as pollution and toxic substances.

By implementing these preventive strategies, we can reduce the impact of preventable diseases and improve our overall health and well-being.

Remember, prevention is always better than cure. Take the necessary steps to prevent these diseases and enjoy a healthier and happier life!

Explanation:

match the choices below to the correct description. - this body wave is a compressional wave. - this body wave is a shear wave. - this surface wave moves from side to side. - this surface wave moves up and down.

Answers

Answer:

his body wave is a compressional wave: This type of wave travels through the earth in a push-pull motion, similar to sound waves through air. This type of wave is also known as a P-wave or primary wave.

This body wave is a shear wave: This type of wave moves material back and forth perpendicular to the direction of the wave. This type of wave is also known as an S-wave or secondary wave.

This surface wave moves from side to side: This type of wave is a type of Rayleigh wave, which moves the ground up and down and side-to-side in a rolling motion. This type of wave is slower than body waves and often causes the most damage during earthquakes.

This surface wave moves up and down: This type of wave is a type of Love wave, which moves the ground from side to side perpendicular to the direction of the wave. This type of wave is faster than Rayleigh waves and can also cause significant damage during earthquakes.

Explanation:

This body wave is a compressional wave: P-wave (Primary wave)
This body wave is a shear wave: S-wave (Secondary wave)
This surface wave moves from side to side: Love wave
This surface wave moves up and down: Rayleigh wave

Here you can learn more about surface wave

https://brainly.com/question/13779567#

#SPJ11

How do astronomers know which element is present where?
A. By looking for specific wavelengths of light that each element produces
B. By comparing the density of the gas to the densities of various elements
C. By measuring the temperature of each part of the gas
D. By observing chemical reactions taking place in the nebula​

Answers

Answer:

A. by looking for specific wavelengths of light that each element produces

Explanation:

Astronomers tend to use a spectroscope that helps find light and wavelengths.

is 11 cups of water a day good for your health?

Answers

Yes it is,water is good for you

5. How did your target heart rate range compare to your actual heart rate during
exercise? Were you out of breath? Were you above, below, or within your target
range?

Answers

Answer:

Your breathing and heart rate rise when you engage in endurance exercises, also known as aerobic exercises.

Explanation:

Your breathing and heart rate rise when you engage in endurance exercises, also known as aerobic exercises. You may maintain your health, increase your fitness, and carry out the daily duties you need to undertake with the support of these exercises. The health of your heart, lungs, and circulatory system are all improved by endurance training. They also have the power to postpone or even reverse several illnesses that are common in older people, including diabetes, breast and colon cancer, heart disease, and others. Exercises that increase endurance include:

Any exercise should begin with a 5 minute _____ and end with a 5 minute ____

Answers

stretch? this question is biased

three initiatives that grade 10 learners may consider implementing to fostor unity after having been divided by discriminatory tendencies.also indicate how each initiative could help decrease future discriminatory acts in your school

Answers

By fostering empathy and goodwill among students and giving a method to handle issues that encourage accountability, these programs can promote genetic  and reduce discriminatory behavior in the school.

How can accountability be demonstrated?

Being committed to completing your tasks and goals is an excellent illustration of accountability. You'll be successful in accomplishing your goals effectively if you can control outside distractions and pressures. You are also setting a positive example for your team when they observe this. You instill in your employees a strong work ethic.

In a professional setting, what does accountability mean?

In a professional setting, what does accountability mean? Everyone on the team is accountable for their performance, decisions, actions, and behaviors in the workplace. Also, it is related to a rise in work ethic and morale among employees, which promotes greater performance.

To know more about promote genetic visit:

https://brainly.com/question/13898654

#SPJ1

Mateo a participar en un concurso para crear el logotipo de los juegos coleguiativo como será la silueta del logatipo si es un cuadritero con un ángulo de 210​

Answers

"The description of a quadrilateral with an angle of 210 degrees suggests that one of the corners of the quadrilateral would extend inward, forming a concave angle.

This corner would be opposite to another corner, where the two sides of the quadrilateral join to form the angle of 210 degrees. The other two corners of the quadrilateral would have convex angles of 90 degrees each. The final shape of the logo will depend on how this quadrilateral is used in creating the overall design. It could be used as a frame or container for other graphic elements, or it could be stylized and simplified to create a more abstract shape that represents the values and themes of the College Games."

For such more question on quadrilateral

https://brainly.com/question/29615475

#SPJ4


To help boost her students' levels of confidence on an upcoming standardized test, Mrs. Thomas decided to use subliminal messages. What was h
BEST attempt at using subliminal messages?
O A. She made a puzzle that when students put it together revealed: "You've got this."
OB.
At the top of the study guide, she typed the words: "You have all the answers you need."
She hid the words "You will succeed" multiple times in a review video for her students.
On the students' lockers, she made posters that said, "You will ace this upcoming test."
O C.
O D.

Answers

Mrs. Thomas made the decision to employ subliminal messages in order to increase the students' trust in herself for an impending standardised test. She created problem that said, "You've got this," after kids solved it.

Correct option is, A.

How does subliminal messaging affect the brain?

The brain's response to subliminal information is therefore not automatic and requires concentration. The looks activated by subliminal signals was proven to be the main sensory cortex, a section which was discovered to be the earliest to just get data from the retina.

What constitutes a successful subliminal?

These are advertisements that give viewers the impression that they have found the covert message. They should be a bit pleased with themselves and perhaps enjoy the wit of the advertisement. It shouldn't ever seem like an effort to hypnotise or brainwash someone.

To know more about impending visit:

https://brainly.com/question/28343828

#SPJ1

b. Why are health professionals trying to increase the number of people who can be
organ or tissue donors? How are they doing this?

Answers

Answer: The kidney is a paired organ, which means a living individual can donate one kidney. Health professionals are trying to increase the number of people who can be organ or tissue donors because, there are people in need of a new organ and they need people to be willing to donate a kidney. They are trying to increase the number so then people in need can get the help they need.

I answered what I could!  

     

   Hope I helped you out!

Which is one way to develop the refusal skills you will need in actual social situations? A. role-playing B. talking to yourself C. thinking about situations D. imagining being confident

Answers

Answer: One effective way to develop the refusal skills you need in actual social situations is through role-playing.

Explanation:

Role-playing involves practicing how to say "no" in different situations, such as saying no to peer pressure or rejecting an offer that makes you uncomfortable. This allows you to practice and develop your communication skills and build your confidence in saying "no" in real-life scenarios.

Role-playing can also help you anticipate potential situations where you may face pressure to engage in behaviors that go against your values or beliefs. By rehearsing and practicing your responses to these situations, you can be better prepared to handle them in real-life scenarios.

Overall, role-playing is a useful tool for developing refusal skills that can help you navigate social situations with confidence and assertiveness.

Answer: A.

Explanation: Always taking actions before doing anything will always result in a more prepared and better outcome for when the event actually happens. Think about it like studying for a test. If you actually study, you will do better on the exam rather than thinking about studying or talking to yourself about studying. Being or imagining being overconfident is always a detriment: it is good to give yourself a boost in moral when needed, however, in excess it is just promoting probable failure.

One of the reasons medical costs are so high is the role of for-profit hospitals, which can lead to unnecessary medical procedures. What does this imply about non-profit hospitals?


There is no oversight for non-profit hospitals regarding what they charge.


All non-profit hospitals are run by government organizations.


Most patients will undergo any procedure that doctors recommend.


Non-profit hospitals have less incentive to recommend unnecessary procedures.

Answers

The statement implies that non-profit hospitals have less incentive to recommend unnecessary medical procedures compared to for-profit hospitals.

What is non profit hospital?

A non-profit hospital is a type of hospital that operates as a charitable organization and does not distribute profits to shareholders or owners. Instead, any financial surplus is reinvested in the hospital or used to support community health programs.

Non-profit hospitals may be owned and operated by a variety of organizations, including religious institutions, universities, or community-based organizations. They often have a mission to provide accessible and affordable health care to their communities, and may offer a range of services, such as primary care, emergency care, specialized surgeries, and other medical treatments.

Since for-profit hospitals are motivated by profit, they may recommend or perform medical procedures that are not medically necessary in order to generate revenue. In contrast, non-profit hospitals typically have a different mission, such as providing quality care to the community, and may have less pressure to generate profits. This can result in non-profit hospitals being more conservative in recommending and performing medical procedures, which could lead to lower medical costs for patients. However, it is important to note that this statement does not imply that non-profit hospitals are immune to financial pressures or that there is no oversight for non-profit hospitals regarding what they charge.

To know more about Medical visit :-

https://brainly.com/question/27885331

#SPJ9

Please choose one of the options below:

1. I have been bullied by someone and want to stand up for myself.

2. I have bullied someone and need to ask for forgiveness.

3. I know someone who is being bullied and want to help the person and the person doing the bullying.

With your choice from above, choose the corresponding action below, and then write out what you learned from this experience. Example: If you choose #1 above, then choose action #1 below, and do it.

1. Go to a classmate, teacher, or leader. Explain the situation, approach the individual, and reconcile with a leader present. Don't be afraid or ashamed to tell your story in a truthful way. You are doing the right thing and should take pride in standing for what is right.

2. Take a classmate, teacher, or leader and go apologize to the person you've hurt and make the situation right.

3. Find a classmate, teacher, or leader, and share what you believe is happening or what you've experienced so you can help make the situation right for your friend or the person being hurt as well as the person doing the bullying.

PLEASE HELP, i havent experienced any of these things so i dont have anything to put for this!!

Answers

Answer:

If you have been bullied by someone and want to stand up for yourself, you can choose to go to a classmate, teacher, or leader, explain the situation, approach the individual, and reconcile with a leader present. It is important to be truthful about what happened and not be afraid or ashamed to tell your story. You have the right to stand up for yourself and seek help from others. This experience can teach you the importance of speaking up and seeking help when you are being treated unfairly.

If you have bullied someone and need to ask for forgiveness, you can take a classmate, teacher, or leader and go apologize to the person you've hurt and make the situation right. It is important to take responsibility for your actions and show genuine remorse. This experience can teach you the importance of empathy and treating others with kindness and respect.

If you know someone who is being bullied and want to help, you can find a classmate, teacher, or leader, and share what you believe is happening or what you've experienced so you can help make the situation right for your friend or the person being hurt as well as the person doing the bullying. It is important to speak up and be an ally for those who are being mistreated. This experience can teach you the importance of being compassionate and taking action to help others in need.

Explanation:

A patient has high lipid levels. The nurse decides to discuss some of the patient's risk factors. Which of

the following should be included? Select all that apply.

Type 2 diabetes mellitus

Hyperthyroidism

Sedentary lifestyle

Familal hypercholesterolemia

Diet with high level of omega-3 fatty acids

Answers

Answer: Diet with high level of omega-3 fatty acids

there are two charge balls hanging from a roof with long silk threat and are free to move ball one has a charge of 2 mc and ball two has a charge of 6 mc calculate the charge in each sphere after they touch

Answers

There are two charged balls hanging from a roof with long silk thread and are free to move ball 1 has a charge of 2 mC and ball 2 has a charge of 6 mC. The charge in each sphere after they touch is 4mC.This is according to the law of conservation of charge.

What is law of conservation of charge?

According to the fundamental law of physics known as "conservation of charge," electric charge cannot be generated or destroyed. This implies that over time, the total electric charge in a system stays constant. This law, which is founded on the idea of energy conservation, is crucial for comprehending how electric charges behave in a system. Because it explains how electric currents and circuits behave, conservation of charge is a key idea in electrical engineering. Understanding the behavior of atoms, molecules, and other subatomic particles requires an understanding of charge conservation. A fundamental law of physics known as the conservation of charge is utilised to explain a variety of natural occurrences.

What is Electric charge?

The attraction or repulsion between things as a result of their interaction with an electric field is described by the electric charge, which is a fundamental feature of matter. The magnitude of an object's charge, which may be positive, negative, or neutral is used to measure it.

To know more about Electric field, visit;

https://brainly.com/question/8971780

#SPJ9

Consider the simple air-standard refrigeration cycle. Air enters the compressor at 0. 1 MPa and -20◦C and leaves at 0. 5 MPa. Air enters the expander at 15◦C. Determine 1. The COP for this cycle. 2. The rate at which air must enter the compressor to provide 1 kW of refrigeration

Answers

a) The COP for this cycle is 2.94.

b) The rate at which air must enter the compressor to provide 1 kW of refrigeration is 0.27 kg/s.

To solve this problem, we need to use the basic principles of the air-standard refrigeration cycle and the definitions of the coefficient of performance (COP) and refrigeration capacity.

First, let's draw a schematic of the refrigeration cycle and label the relevant states:

(State 1)      (State 2)

 |                   |

 |           compressor

 |                   |

 |-----|-------|---|

       |         |

      (State 3) (State 4)

       |         |

       |       expander

       |         |

      (State 5) (State 6)

Where State 1 is the inlet to the compressor, State 2 is the outlet of the compressor, State 3 is the inlet to the evaporator, State 4 is the outlet of the evaporator, State 5 is the inlet to the expander, and State 6 is the outlet of the expander.

Now, let's use the given information to find the properties of the air at each state:

State 1: P1 = 0.1 MPa, T1 = -20°C

State 2: P2 = 0.5 MPa (given), T2 = T3 (isentropic compression)

State 3: T3 = -20°C (given), P3 = P4 (isobaric heat rejection)

State 4: Q_L = 1 kW (given), T4 = 0°C (saturated vapor at P4)

State 5: T5 = 15°C (given), P5 = P6 (isobaric heat absorption)

State 6: T6 = T1 (isentropic expansion), P6 = P1 (given)

Next, we can use the ideal gas law and specific heat ratios to find the specific volume, specific enthalpy, and specific entropy at each state. We can use the table values of specific heat ratios for air:

k = 1.4 (constant-pressure specific heat ratio)

[tex]c_p[/tex] = 1.005 kJ/kg·K (specific heat capacity at constant pressure)

[tex]c_v[/tex] = 0.718 kJ/kg·K (specific heat capacity at constant volume)

With these values, we can use the following equations to find the properties of each state:

[tex]v = R_{air}* (\frac{T}{P})[/tex]

[tex]h = c_p *T[/tex]

[tex]s = [c_p* ln(\frac{T}{T_0})] - [R_{air} *ln(\frac{P}{P_0})][/tex]

Where [tex]R_{air} = 0.287[/tex] kJ/kg·K is the specific gas constant for air, and T0 and P0 are reference values of temperature and pressure (usually taken as 0°C and 1 atm).Using these equations, we can find the properties of each state as follows:

State 1: v1 = 0.892 m³/kg, h1 = -107.3 kJ/kg, s1 = -0.392 kJ/kg·K

State 2: v2 = 0.175 m³/kg, h2 = -78.4 kJ/kg, s2 = -0.364 kJ/kg·K

State 3: v3 = 0.892 m³/kg, h3 = -107.3 kJ/kg, s3 = -0.392 kJ/kg·K

State 4: v4 = 0.971 m³/kg, h4 = -31.3 kJ/kg, s4 = -0.219 kJ/kg·K

State 5: v5 = 0.792 m³/kg, h5 = -42.1 kJ/kg, s5 = -0.305 kJ/kg·K

Learn more about compressor

brainly.com/question/12950601

#SPJ4

Other Questions
The equation of the passing through the points(-1,-4) and (3,0) which of the following type of media is most commonly used in backbone networks because of its high capacity? question 5 options: fiber un-shielderd twister pair shielded twisted pair coax cable which of these enviroments will have the highest average temperatures? rural farms, urban cities, ocean shorelines, or suburban centers? Which could be the entire interval over which the function, f(x), is negative? A) (8, 2) B) (8, 0) C) (, 6) D) (, 4) When eighteen is reduced by one-third of a number, the result is 9. Find the number. Tommy Sweeney could easily be elected in the next mayoral electionis this sentence passive or action voice Under her cell phone plan, Sydney pays a flat cost of $35.50 per month and $5 per gigabyte. She wants to keep her bill under $50 per month. Write and solve an inequality which can be used to determine x, the number of gigabytes Sydney can use while staying within her budget. Consider a two-period endowment economy populated by identical households with preferences defined over consumption in period 1, C1 and consumption in period 2, C2, and described by the utility functionlnC1 +ElnC2where C1 denotes consumption in period 1, C2 denotes consumption in period 2, and E denotes the expected value operator. Each period, the economy receives an endowment of 10 units of food. Households start period 1 carrying no assets or debts from the past (B0 = 0). Financial markets are incomplete. There is a single internationally traded bond that pays the interest rate r = 0.a) Compute consumption, the trade balance, the current account, and national saving in period 1.b) Assume now that the endowment in period 1 continues to be 10, but that the economy is prone to severe natural disasters in period 2. Suppose that these negative events are very rare, but have catastrophic effects on the countrys output. Specifically, assume that with probability 0.01 the economy suffers an earthquake in period 2 that causes the endowment to drop by 90 percent with respect to period 1. With probability 0.99, the endowment in period 2 is 111/11. What is the expected endowment in period 2? How does it compare to that of period 1?c) What percent of period 1 endowment will the country export? Compare this answer to what happens under certainty and provide intuition.d) Suppose that the probability of the catastrophic event increases to 0.02, all other things equal. Compute the mean and standard deviation of the endowment in period 2. Is the change in probability mean preserving?e) Calculate the equilibrium levels of consumption and the trade balance in period 1. d) Science gives more evidence for creation than a belief in GodEvaluate this statement considering argumentsboth for and against. In your answer you should:Refer to Catholic teachingRefer to different Christian and non-religiousbeliefsReach a justified conclusion Researchers were able to observe changes in bacterial populations that resulted from mutations. How were the later generations of bacteria different from the original population?1.) They were 25 percent faster due to having more tails.2.)They lost the ability to reproduce.3.) They were 25 percent faster due to having fewer tails.4.) They required less food to grow and reproduce. 1. The graph shown is a graph of f'(x). If f(2)=5, use the graph to find f(8). A. 16.5C. 25.5D. 21.5E. 25 7. Which of the following is an element? a) Sugar b) Copper c) Salt d) Water -5/8 - -4/3 in simplest form FILL IN THE BLANK. A director chooses the ____________ frame when the characters in the story are restricted () in their movements, often due to outside forces, such as social or economic forces. Often used in horror, thriller, dramas, or anything not wishing to refer to the real. Typically features the exaggerated and stylized depth, the distorted light and shadow, and distorted shadow. In the _______ frame, the design elements call attention to themselves and may be more important than the characters. Dima has twice as many books as Ramiro. If dima gives 12 books to Ramiro, they will have the same number of books.How many books do they have in total Sanjay attempts a 49-yard field goal in a football game. For his attempt to be a success, the football needs to pass through the uprights and over the crossbar that is 10 feet above the ground.Sanjay kicks the ball from the ground with an initial velocity of 73 feet per second, at an angle of 34 with the horizontal.What is true of Sanjay's attempt?ResponsesThe kick is not successful. The ball is approximately 5 feet too low.The kick is not successful. The ball is approximately 8 feet too low.The kick is not successful. The ball is approximately 2 feet too lowThe kick is good! The football clears the crossbar by approximately 5 feet. Which of the following would you expect to see written as separated ions in an ionic equation?H2(g)H2O(l)H2S(g)HCl(aq) Find the length of the diagonals of rectangle WXYZ. WY = 14x + 10; XZ = 11x + 22 What fats are and where they are found . What are the three different types? Roberto will put a border around the edges of the platform how much border will he need if the area is 12 square units?