how do the shades functions in soft and hard pencil​

Answers

Answer 1

Answer:

Harder pencils produce lighter marks since less of the material is released as pressure is applied. 

Explanation:

Harder pencils produce lighter marks since less of the material is released as pressure is applied. Softer pencils make darker marks since more of the material is released. Therefore, a "4H" pencil will produce lighter marks than an "2H" pencil while a "4B" pencil will make darker marks than a "2B" pencil.


Related Questions

What are the four levels at which the process of gene expression may be regulated?

Answers

Gene expression can be regulated at four levels: transcriptional, post-transcriptional, translational, and post-translational regulation.

The four levels at which gene expression may be regulated are:

Transcriptional regulation: control of the rate of transcription of DNA into RNAPost-transcriptional regulation: control of the stability, transport, and translation of RNATranslational regulation: control of the rate of protein synthesisPost-translational regulation: control of the activity, stability, and degradation of proteins.

Gene expression is the process by which the genetic information stored in DNA is used to produce functional molecules such as proteins. The process of gene expression can be regulated at four different levels to control the production of proteins. Transcriptional regulation controls the rate of transcription of DNA into RNA.

To learn more about gene expression at

https://brainly.com/question/15159232?referrer=searchResults

#SPJ4

What are the 5 characteristics of a healthy environment?

Answers

The 5 characteristics of a healthy environment are:

Water quality and adequacyAir quality Soil qualityLevels of biodiversityPest and introduced species

Healthier settings might prevent about one-quarter of the worldwide illness load. The COVID-19 outbreak serves as another reminder of the fragile interaction that exists between us and our world. Clean air, a stable climate, appropriate water, sanitation and hygiene, chemical safety, radiation protection, safe and healthy workplaces, sound agricultural practice's, health-supportive cities & built environments, and a maintained natural environment are all essential for optimal health.

Making healthy decisions is crucial, but it is insufficient to compensate for bad environmental situations that harm our health. Because our environment has such a huge influence on our health and well-being, taking care of the environment is a vital aspect of living well. We can collaborate as proactive communities to create a secure, happy, and healthy planet for future generations.

The Intermountain Air Quality and Health team developed a series of patient handouts to assist you understand what to do when the air quality is poor. Pregnant mothers, youngsters in their early infancy years, adults who work outside, and others are among those who would benefit from the handouts.

To know more about the Healthy Environment, here

https://brainly.com/question/28290036

#SPJ4

How do physical activities affects the Behaviour of a person?

Answers

Physical activity has a wide range of benefits that  is Improving mood, Boosting self-esteem, Enhancing cognitive function, Improving sleep.

Improving mood: Exercise is known to release endorphins, which are chemicals in the brain that can improve mood and reduce symptoms of anxiety and depression.

Boosting self-esteem: Regular physical activity can lead to improved physical fitness and body image, which can in turn boost self-esteem and self-confidence.

Enhancing cognitive function: Studies have shown that regular physical activity can improve cognitive function and brain health, including memory, attention, and problem-solving skills.

Increasing social connections: Participating in physical activities such as team sports or group fitness classes can increase social connections and interactions, which can be beneficial for mental well-being.

Reducing stress: Exercise can help to reduce stress and promote relaxation by decreasing cortisol levels in the body.

Building healthy habits: Participating in regular physical activity can help to develop healthy habits and routines, which can have positive effects on behavior and overall health.

Improving sleep: Regular exercise can help to improve sleep quality and duration, which can lead to better overall physical and mental health.

Increasing energy levels: Physical activity can help to increase energy levels and reduce fatigue.

To know more about Physical activity  click below:

https://brainly.com/question/14338730#

#SPJ4

What are lifestyle diseases?

Answers

Answer: heart disease, stroke, diabetes, obesity, metabolic syndrome, chronic obstructive

Explanation: i will edit this if you need a specific answer

How will involvement to physical activity help you to become a good person?

Answers

Exercise will undoubtedly enhance your health, but it will also improve other aspects of your life. Exercise is essential for improving mental health, lowering stress, and achieving major life objectives.

A healthy lifestyle keeps you fit, active, and less prone to disease. According to the World Health Organization, healthy living is a style of life that allows you to enjoy more elements of your life. It is a style of life that reduces the chances of being seriously ill or dying prematurely. Health is more than merely avoiding sickness or illness.

A healthy lifestyle offers several advantages not just for the body but also for the mind. A healthy lifestyle can also lower your chances of developing cancer, heart disease, diabetes, obesity, and osteoporosis. To summarise, there are several advantages to leading a healthy lifestyle.

To learn more about importance of physical fitness, here

https://brainly.com/question/1188359

#SPJ4

Length of program or degree for police officer?

Answers

Answer:Sign up at the police academy

Explanation:

Answer:

It usually takes about 13 to 19 weeks on average but can last up to six months. Note that it is possible to complete the Police Academy prior to applying for a police officer.

Explanation:

Hope this helps! :)

What is environmental wellness?

Answers

Being in excellent health means spending time in enjoyable, stimulating situations that promote wellbeing. It promotes outdoor recreation and the creation of a tranquil private area.

What effects does the environment have on our health?

Environmental toxins can make conditions like tumors, heart failure, and respiratory issues worse. Low-income people have a higher likelihood to reside in contaminated locations and have access to contaminated water. Additionally, children and pregnant women are more at risk for pollution-related health problems.

Why is the health of the environment important?

How we relate to and deal with the natural world is referred to as our environmental wellbeing. Positive interactions with nature lead to emotions of admiration and thankfulness. These emotions motivate us to safeguard the environment and lead better lives.

To know more about wellness visit:

https://brainly.com/question/28295265

#SPJ4

According to the author, the decline of tennis in the United States comes primarily as a result of the A popularity of sports such as baseball, basketball, and football B trouble involved in player development C difficulty of playing tennis D small number of accessible tennis courts E retirement of Pete Sampras

Answers

The key factor for tennis' decline in the United States, according to the author, is the problem with player development.

Which country invented tennis?

Tennis is an amazing sport that is today played for fun or competitively on a variety of surfaces by a vast number of people. The jeu de paume, which originated in France in the eleventh century and was developed and standardized in England in the 1870s, is the immediate ancestor of this game.

The British colonizers introduced tennis to India in the 1880s, and it immediately became a popular sport. BK Nehru and Sardar Nihal Singh eventually joined as M Saleem, the Fayzee brothers, and Jagat Mohan Lal who proceeded to the Wimbledon's final 16 stages.

learn more about tennis

brainly.com/question/29368983

#SPJ4

What is a condition that is likely to have a clear past history of similar complaints? A. Trauma to the abdomen. B. Ectopic pregnancy. C. Cholecystitis

Answers

it’s C , Cholecystitis

Health authorities recommend that adults consume _____ ounces of seafood per week. a. 8-12 b. 3-6 c. 14-21 d. 5-7 e. 2.5.

Answers

Adults should consume 8 to 12 ounces of seafood per week, according to health authorities.

The most popular marine life for human consumption as "seafood" is fish and shellfish. Clams, oysters, mussels, cephalopods like octopus and squid, crustaceans like shrimp, crabs, and lobster, and echinoderms like sea cucumbers and sea urchins are just a few of the mollusk species that go under the umbrella name "shellfish."

Around the world, seafood is a major source of (animal) protein, particularly in coastal cuisines. According to popular belief, pescetarians are semi-vegetarians who mostly consume seafood as their supply of meat.

There are some detrimental outcomes as well. Seafood allergy is more prevalent in areas where seafood is a big part of the diet. There are conditions that resemble seafood allergies that are caused by parasites or toxins present in seafood.

To know more about health authorities

brainly.com/question/26013527

#SPJ4

What are 3 types of heat stroke?

Answers

The 3 types of heat strokes are

Heat crampsHeat exhaustionHeat stroke

Heat stroke is the most deadly heat-related illness. It happens when the body's temperature can no longer be controlled: the body's temperature rises fast, perspiration stops, and the body is unable to cool down. Heat stroke causes the body temperature to swiftly rise to 106°F or higher. Heatstroke is a potentially lethal disease induced by excessive body heat.

Heat exhaustion is characterised by profuse sweating and a rapid pulse as a result of your body overheating. It is one of three heat-related diseases, with heat cramps being the mildest and heatstroke being the most serious.

Heat cramps are painful, involuntary muscle spasms that occur after heavy physical activity in hot conditions. The spasms might be more intense and linger longer than regular midnight leg cramps. Heat cramps are typically induced by electrolyte and fluid loss.

To learn more about heat strokes, here

https://brainly.com/question/2107818

#SPJ4

The pediatric nurse knows that there are a number of anatomic and physiologic differences between children and adults. Which statement about the immune systems of infants and young children is true

Answers

One statement that is true about the immune systems of infants and young children is that they have less developed immune systems compared to adults.

Infants and young children have less mature immune systems, which means that they are more susceptible to infections and may have a harder time fighting off illnesses.

They also lack the immunity that comes from exposure to certain infections, which is why they need to receive vaccinations.

Additionally, the thymus, an important organ in the immune system, is also not fully developed in infants and young children, this results in less production of T-cells and less ability to produce immunological memory.

To learn more about immune systems at

https://brainly.com/question/19843453?referrer=searchResults

#SPJ4

What are 5 cardiovascular exercises you can do to strengthen your heart?

Answers

Cardiovascular exercises you can do to strengthen your heart are:

Brisk walkingRunningSwimmingCyclingPlaying tennis Jumping rope

Cardiovascular exercise would be any action that involves the use of aerobic metabolism. That is, oxygen is strongly engaged in the cellular activities that provide the energy required to sustain that activity during the activity. Your heart rate increases, and as breathe more deeply in order to optimism the quantity of oxygen in the bloodstream and help you use oxygen more efficiently. As a result, you are more invigorated and do not fatigue easily.

Understanding the link between cardiorespiratory fitness as well as other types of conditioning necessitates an examination of the changes that occur with increasing aerobic or anaerobic capacity. As aerobic/anaerobic capacity grows, general metabolism rises, muscle metabolism rises, hemoglobin rises, bloodstream buffers raise, venous return rises, stroke volume rises, and the blood bed becomes more adaptable to varied demands. Each of these cardiovascular fitness/cardiorespiratory conditioning outcomes will have a direct favorable influence on muscular endurance and an indirect positive effect on strength and flexibility.

To know more about the Cardiovascular, here

https://brainly.com/question/14349574

#SPJ4

What are the top 5 common diseases that we can acquire if your lifestyle is not health?

Answers

1. Obesity
2. Heart disease,including coronary artery disease and heart attack.
3. High cholesterol
4. Stroke
5. Metabolic syndrome

What are the 3 main lifestyle diseases?

Answers

Lifestyle disease include atherosclerosis,heart disease,and stroke; obesity and type 2 diabetes; and disease associated with smoking and alcohol and drug abuse.

Hopefully his helps.

What is the purpose of the Food Guide Pyramid ?

Answers

Answer: The Food Pyramid shows how much of what you eat overall should come from each shelf to achieve a healthy, balanced diet. The shape of the Food Pyramid shows the types of foods and drinks people need to eat most for healthy eating.

Explanation:

Sporting examples of lateral rotation, Eversion, Inversion, Dorsiflexsion, elevation and Depression.

Answers

Sporting examples of lateral rotation is Dorsiflexsion

What is Dorsiflexsion?The backward bending and contracting of your hand or foot is known as dorsiflexion. Your foot's ankle and your hand's wrist are extended in this way. Although the term "dorsiflex" typically refers to your wrist or ankle, you can also do it with your fingers and toes.Because it permits the tibia (the shin bone) to glide forward easily, dorsiflexion is significant. When squatting, the top of our body may lean forward to compensate for the ankle's immobility if the tibia is trapped in a vertical position [1].Tightness in your lower-limb posterior chain muscles, particularly in your calves, is one of the main causes of inadequate dorsiflexion. Restricted ankle movement, which is frequently

To learn more about Dorsiflexsion refers to:

brainly.com/question/29832298

#SPJ1

How painful is heat stroke?

Answers

Confusion, changed mental state, slurred speech, loss of consciousness (coma), and hot, dry skin or copious perspiration are all symptoms of heat stroke.

Heat stroke is induced by high outdoor temperatures and/or physical exertion. It usually occurs as a result of unavoidable prolonged exposure to extreme ambient or exertional heat. Specific medical illnesses, on the other hand, can increase the risk of heat stroke, and persons, particularly children, with specific genetic predispositions are vulnerable to heatstroke even under mild conditions.

Exertional heat stroke can occur in young people who do not have any health problems or drugs, most typically among athletes, outdoor labourers, or military personnel participating in strenuous hot-weather activity, or first responders wearing heavy personal protection equipment. It is vital to understand that humidity restricts the body's ability to cool itself through sweat and evaporation in both hot and humid circumstances. Excessive body temperature in humans and other warm-blooded species has been shown to disrupt enzymes that control biochemical pathways required for cellular respiration and organ function.

To learn more about heat stroke, here

https://brainly.com/question/4447364

#SPJ4

What are the 3 characteristics of a healthy community?

Answers

A healthy community is one in which all citizens have access to a good education, safe and healthy housing, appropriate work, transportation, physical exercise, and nutrition, as well as good health care.

Community health refers to basic health care provided by laypeople outside of hospitals and clinics. Community health is another aspect of public health that doctors are taught and practice. Having excellent health allows a person to go about their everyday activities with ease. Physical health refers to a person's body being free of sickness, whereas mental or social health refers to a person's capacity to do different social responsibilities assigned to him.

Along with eating well and exercising regularly, true health is getting adequate sleep, practicing mindfulness, managing stress, keeping mind and body fit, interacting socially, and doing other activities. A healthy active lifestyle is a way of living that includes frequent exercise and nutritious eating to promote overall health.

To learn more about healthy community, here

https://brainly.com/question/21598779

#SPJ4

How important is physical activities in your daily life as a student as a member of your family?

Answers

Answer: Being physically active can improve your brain health, help manage weight reduce the risk of disease strengthen bones and muscles and improve your ability to do everyday activities

Explanation:

A dieter whose weight falls below his or her set point is likely to experience a(n)
A. decrease in hunger and an increase in metabolic rate.
B. increase in hunger and an increase in metabolic rate.
C. decrease in hunger and a decrease in metabolic rate.
D. increase in hunger and a decrease in metabolic rate.

Answers

A dieter whose weight falls below his or her setpoint is likely to experience a(n): Increase in hunger and a decrease in metabolic rate.

Setpoint theory states that the human body tries to maintain its weight within a preferred range. Many people stay within a range of more or less weight throughout adulthood. Some people's systems allow them to stay lean when they are young, but can gain weight after middle age.

Metabolism is also constantly regulated up and down based on various signals. According to setpoint theory, your weight may increase or decrease temporarily, but will eventually return to your normal set range. A signaling system helps you maintain your weight.

Setpoint theory is the idea that the human body has a certain weight that it wants to maintain, and that the body adapts to maintain that weight whenever possible.

For more information on Setpoint , visit :

https://brainly.com/question/15409115

#SPJ4

A Tampa surgeon, Dr. Floyd Legatron, mistakenly removed the wrong leg of 52-year-old Jameson Kingsmith during an amputation procedure in June of 2009. Apparently, a chain of errors led to the mishap, and the surgical team even realized their error halfway into surgery, but by that time it was too late, and the leg had to be removed

Answers

The fundamental idea and providing a situational depiction are both of high quality.

Describing the idea and the situation Why is quality important?

The degree to which something is excellent, frequently to a high degree: The caliber of our products is guaranteed by our business. [ U ] Often, the term "quality" describes how good or poor something is: Highest-quality fabric made up the garment. The scenario is good.

What does "quality of work" mean?

What defines good work? Work quality is the standard of work that a team or individual consistently produces. Examples of good job qualities include professionalism, communication, and time management. These variables aid in gauging how well a company's personnel, divisions, or programs are performing.

To know more about quality visit:

https://brainly.com/question/18376767

#SPJ4

How do you write an action plan to achieve your goals?

Answers

Answer:

Start with an mission statement, then think about your goal, add some small steps to get there and boom you have an action plan.

What was before the food pyramid?

Answers

Before food was organized into cohesive groups or placed into a pyramid or a plate, the United States Department of Agriculture introduced the Basic 7 Food Chart.

How did the food pyramid alter, and why?

The food pyramid was modified by the U.S. Department of Agriculture in spring 2005 in order to provide a clearer illustration of a healthier diet. The revised prism is based on the most recent, credible scientific evidence regarding the relationship between diet and health.

The FDA updated the food pyramid when?

The USDA pyramid from 1992 was superseded by the one from 2005, which was distinct from it in a number of ways. More focus is placed on the whole carbohydrates and physical exercise in the new pyramid.

To know more about food pyramid visit:

https://brainly.com/question/17234521

#SPJ4

Please answer a simple A B or C.
Bianca has recently begun her first job as a pharmacy technician. One morning, she is tasked with filling forty-five different prescriptions while also answering the phone. After working for a few hours, she realizes she probably will not be able to finish filling all the prescriptions while going at her current pace. What is the best way that Bianca could handle her current situation in order to build trust with her coworkers?

A. explain the problem to her boss and ask for suggestions for increasing her productivity

B. have her co-workers take the phone calls while she fills her prescriptions

C. divide the precriptions amongst her co-workers to share the work load

Answers

Answer:

B. have her co-workers take the phone calls while she fills her prescriptions

Explanation:

I took the test.

What are 3 interesting facts about crime scene investigation

Answers

1. bugs can help solve a crime
2.teeth are typical identifiers on corpses
3. hair roots can identify gender

bonus: This one is random, but glitter is PERFECT when it comes to evidence. For one, it’s easily transferable from one person to another. Two, since it’s something not so obvious (unlike blood), suspects probably won’t wash it off immediately, if it even comes off their bodies at all. And lastly, it’s easy to fine with the shine of a flashlight. The likelihood that a crime scene involves glitter is not very likely, but… the more you know.

What are the side effects of heat exhaustion?

Answers

Heat exhaustion has the following side effects:

Sweating profuselySkin that is cold, pallid, and clammyA quick, feeble pulseVomiting or nauseaCramping of the musclesFatigue or weaknessDizziness

Heat exhaustion occurs when the body overheats (heats up) and is unable to cool itself down. During exercise or other physical activity, your body might overheat, particularly in hot, humid conditions.

Sweating is how the body loses fluids while you exercise. You can get dehydrated if you do not replenish those fluids with water or other drinks. Heat exhaustion can also be caused by dehydration.

Heat exhaustion symptoms consist of dizziness, headache, nausea, muscular cramps, and others. Removal from of the heat, rest, and fluids are all part of the treatment. Heat exhaustion, if left untreated, can progress to heatstroke, a potentially fatal illness.

To know more about the Heat exhaustion, here

https://brainly.com/question/2107818

#SPJ4

Why is it important for you to be physically active especially during this time of the dreadful virus causing disease called Covid 19?

Answers

Physical activity on a regular basis improves both the body and the mind. It can lower blood pressure, aid in weight management, and lower the risk of heart disease, stroke, type 2 diabetes, and different malignancies - all of which can enhance susceptibility to COVID-19.

Physical activity may enhance mental health, aid in weight loss, reduce illness risk, strengthen bones and muscles, and increase capacity to do everyday tasks. Adults who sit less and participate in moderate-to-vigorous physical activity have better health.

Physical activity helps you live longer and avoid chronic diseases such as heart disease, high blood pressure, an abnormal blood lipid (cholesterol and triglyceride) profile, stroke, type 2 diabetes, metabolic syndrome, and colon and breast cancer. Cardiorespiratory endurance is recognised as the most important component of health-related fitness since the heart and lungs are so important to overall health.

To learn more about importance of physical fitness, here

https://brainly.com/question/28418634

#SPJ4

Carmen is known for having excellent sportsmanship on the baseball diamond. Even after striking out, Carmen displays a good attitude and respects himself, other players, and the equipment. Which scenario demonstrates that Carmen respects the equipment during a baseball game even if he doesn't get a hit? Carrying the bat back to the dugout and placing it in the rack without incident Flinging the bat across the grass toward his team's dugout Snapping the bat across his thigh during an angry outburst Striking the bat against the wall of the dugout to release his frustration

Answers

The scenario that demonstrates that Carmen respects the equipment during baseball game even if he doesn't get a hit is : Carrying the bat back to dugout and placing it in the rack without incident.

What do you understand by sportsmanship?

An aspiration that a sport or activity will be enjoyed for its own sake is called sportsmanship and this is with proper consideration for fairness, ethics, respect, and a sense of fellowship with one's competitors.

Some of the main qualities that contribute to sportsmanlike behavior are : Be supportive, if you're losing, it's not good to take your disappointment out on your teammates, have a positive attitude, be respectful, willing to learn and also practice self-control.

To know more about sportsmanship, refer

https://brainly.com/question/9234010

#SPJ4

_____ in our diets helps us to feel full.?

Answers

Answer:

High-fibre foods in our diets help us to feel complete.

Explanation:

High-fibre foods not only provide volume but also take longer to digest and make you feel full longer with fewer calories. Vegetables, fruits and whole grains all contain fibre. Popcorn is an excellent example of a high-volume, low-calorie whole grain. This is why high-fibre foods in our diets help us feel complete.

Other Questions
Why is copper wire a better conductor of electricity than carbon fiber? (1 point)A) Carbon (C) does not have any valence electrons.B) Copper (Cu) is a metal, and only metals can conduct electricity. C) The electrons in copper (Cu) are loosely bound to the nucleus.D) Copper (Cu) has no loose electrons. Compare the Giant's Causeway with Devils Tower. In what ways are these formations similar? In what ways are they different During the Roman empire, someone spoke to the Senate complaining about the behavior of teenagers who was that what fraction of 3 kilograms is 50 grams Write an equation of the perpendicular bisector of the segment with the endpoints (-8,-1) and (4,5). y = A baby manatee weighs 58 kilograms. At birth the manatee weighed 30 kilograms. What is the percent increase in the manatee's weight rounded to the nearest whole number? the reconciliation of the bank statement is a process of comparing date on a bank statement with records maintained in the medical office What are the similarities between aerobics and anaerobic exercise? On a scale, drawing inches equals 10 miles if the length of the road on the scale is 4 inches which of the following could be used to find the length of the road The United States received a shipment of automobiles from Japan. The United States received an_________________________ If you double the total amount of Na ions, but you also double the amount of water they are dissolved in, __________. Is there anyone in your life whom you consider your hero explain? Based on the following reactions who many not have been listening to your thoughts on recycling?A. "These are some great ideas. We should try to get more towns to follow this plan."B. "I did not understand your idea about adding more recycling pick up days. Can you explain that again?"C. "That's good."D. "You have some good ideas, but remember, not all plastics can be recycled." Think back to Act 1. What details, either in the dialogue or in Miller'sdescriptions of the characters, contribute to the atmosphere of impendingdoom that hangs over Salem? A pizza delivery driver must make three stops on her route. She will leave the restaurant and travel 4 miles north to the first house. The next house is 6 miles away in the direction of east. She delivers the last pizza to the third stop, which is 5 miles south of the restaurant before she returns to the restaurant to pick up more pizza. What is her displacment for the entire trip You are hired to work for a company at age 25 and the company has a retirement planwhere you can put up to 6% of your salary into the plan each month and they will matchthat amount. Your starting monthly salary is $6,100, assume for simplicity sake younever get a raise, and the retirement plan guarantees a 6.28% interest rate over the life ofthe plan.Scenario 1: You decide to start the retirement plan right away and you can affordto put the full amount (6% of your salary) into the plan each month.a) What is 6% of your salary? _______________b) Since your company matches what you put into your retirement account, what is thetotal amount put into your account each month?_______________c) How much money will you have in the retirement account when you reach fullretirement age, the time when you can start taking money out of the account, which is 62years old? ________________d) How much money did you put into the account? ________________e) How much money did your employer put into your account? ________________f) How much money did your account gain in interest over the years? _______________Scenario 2: You decide to start the retirement plan right away, but you can onlyafford to put 3% of your salary into the plan each month.a) What is 3% of your salary? _______________b) Since your company matches what you put into your retirement account, what is thetotal amount put into your account each month?_______________c) How much money will you have in the retirement account when you reach fullretirement age, the time when you can start taking money out of the account, which is 62years old? ________________d) How much money did you put into the account? ________________e) How much money did your employer put into your account? ________________f) How much money did your account gain in interest over the years? _______________What is the difference in the amount of money you will have at age 62 between scenarios1 and 2? ________________What is the difference in the amounts of money you put into retirement betweenscenarios 1 and 2? _______________How much more money did you get from your employer in scenario 1 than 2? Raul and are on the green team. He and have finished our science project I am a non-volatile type of built-in memory. I store my contents long-term. My job is to store critical programs that the computer needs to access in order to boot up. What am I What is the sound of I Wandered Lonely as a Cloud? Determine the maximum thickness of an aluminium sheet in which a 50 mm diameter hole is to be punched, if the compressive stress in the punch is not to exceed 80 MPa.