The concentration of PAHs in the suspended particles in units of ng m-3:
concentration = mass/volume = 4.9 × 10-9 g/1440 m3 = 3.4 × 10-12 g m-3 = 3.4 ng m-3
If the concentration of polycyclic aromatic hydrocarbons (PAHs) recorded in the particle extraction is 0.5 ppb, and the concentration of PAHs in the ‘blank’ filter paper is 0.01 ppb, we can calculate the concentration of PAHs in the suspended particles in units of ng m-3.
Concentration of PAHs in extraction = 0.5 ppb
Concentration of PAHs in blank filter = 0.01 ppb
Therefore,
net PAHs concentration = 0.5 - 0.01 = 0.49 ppb = 0.49 μg L-1.
The volume of the sample = 10 mL or 0.01 L. Therefore, the mass of PAHs in the sample is:
mass = concentration × volume = 0.49 μg L-1 × 0.01 L = 4.9 ng = 4.9 × 10-9 g
The sample was collected for 24 hours, and the sampling rate is given as 1 m3 per minute. Therefore, the sampling
volume = 1 m3/minute × 60 minutes/hour × 24 hours = 1440 m3
Therefore, the concentration of PAHs in the suspended particles in units of ng m-3:
concentration = mass/volume = 4.9 × 10-9 g/1440 m3 = 3.4 × 10-12 g m-3 = 3.4 ng m-3
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Some vitamins can be produced by the body.
TRUE
FALSE
Answer:
true
Explanation:
my freind says so..
Look at the speedometer at the top. What do you notice about the speed when the skater goes from a height of 6m down to 0m and back up to 6m?
Answer:
First increases then decreases.
Explanation:
The speed of skater tends to increases when it moves from high elevation of 6 m to the low height area due to sloppy region while on the other hand, when the skater moves again from 0 m or from the ground level to 6 m height its speed decreases when reaches to the highest point. First the speed of the skater increases due to moving in the direction of gravity while on other hand, the speed of the skater decreases due to movement of skater against the gravity of earth.
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Answer:
The hood island tortoise.
Explanation:
It has the longest neck (adaptation), and will be able to reach food that is higher up, like a vine growing on a tree.
It is also because of it's saddle-shaped shell, that will make it easier to stretch.
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the mass of a 235 92u nucleus is _____ the sum of the masses of a 141 56ba nucleus, a 9236kr nucleus, and two neutrons, all separated from each other.
The mass of a 235 92U nucleus is less than the sum of the masses of a 141 56Ba nucleus, a 9236Kr nucleus, and two neutrons, all separated from each other.
The mass of the nucleus is affected by the number of protons and neutrons it contains. The total mass of a nucleus is determined by adding up the masses of the individual protons and neutrons. The mass of a 235 92U nucleus is less than the sum of the masses of a 141 56Ba nucleus, a 9236Kr nucleus, and two neutrons, all separated from each other.The mass of the nucleus is less than the sum of its parts due to a phenomenon known as nuclear binding energy.
The energy required to break a nucleus down into its individual protons and neutrons is referred to as nuclear binding energy. When a nucleus is created, nuclear binding energy is released, which lowers the overall mass of the nucleus by a small amount.The amount of nuclear binding energy present in a nucleus is determined by the number of protons and neutrons it contains. The larger the number of protons and neutrons, the greater the amount of nuclear binding energy. The nucleus becomes more tightly bound as a result of the increased nuclear binding energy, and its overall mass is reduced slightly.
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TRUE/FALSE> littoral zones are more likely to contain vegetation than riparian zones. please select the best answer from the choices provided
Littoral zones are more likely to contain vegetation than riparian zones. This statement is TRUE.
Littoral zone: This is the region of a body of water close to the shore. The littoral zone is the area of the lake where the rooted plants are able to grow. It is the area of the lake where sunlight penetrates all the way to the sediment and allows aquatic plants to grow. Therefore, the littoral zone is more likely to contain vegetation than riparian zones. Riparian zone: This is the area adjacent to a stream or river. Riparian zones are unique and provide a diverse range of habitats for different species. The vegetation in this zone is very important for the proper functioning of stream and river ecosystems. While it may contain vegetation, the likelihood is lower than that of the littoral zone.
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What type of muscle tissue is this
Answer:
It is skeletal muscle tissue also if you see my comment spread the word.
Explanation:
1. Which equation best represents the dissociation of water molecules into hydrogen ions and hydroxide ions?
A circuit consists of a wire, a lightbulb, a switch, and a battery. What would happen if the battery were replaced with a section of wire?
What is the purpose of vaccines?
to help your immune system prepare for diseases
to kill existing diseases in your body
to speed up your healing from diseases
to weaken diseases that affect your body
WILL GIVE BRAINLIST!!!! What effects do weathering, erosion, and deposition have on agriculture in Texas?
Answer:
cause the soil to become less fertile therefore causing the loss of nutrients and farmers can no longer plant crops causing profits to drop.
Explanation:
You aim to chemically synthesize four peptides with the following one-letter amino acid sequences: TIGER, PANTHER, CHEETAH, and CAT. A.Which one of these peptides will have the lowest pl? Give a reason for your answer. You are not required to calculate the pls of the peptides to answer this question. A qualitative knowledge of the ionization properties of amino acids discussed in class is sufficient to answer this question (4 points). B. Based on what we learned in the lectures, draw the titration curve for the GEAR peptide in the pH range 0-14. Make sure to label the two axes, and the pk1, pk2, and pkr values on the curve. If there are multiple R groups that titrate, indicate the pkrs as pKR1, PKR2 etc. You are not required to write out the chemical structures of the various titration intermediates (8 points). C. While entering the sequence in into the automated peptide synthesizer you mistakenly type in CHETAH instead of CHEETAH. So, you synthesize a peptide with the wrong sequence. However, you realize something is wrong as soon as you do a pH titration of the peptide. What is one difference be- tween the pH titration curves for the peptides CHEETAH and CHETAH? You can either answer in words alone or with help of pH titration curves (4 points).
The peptide CAT is expected to have the lowest pI due to its composition of basic amino acids.
The pI of a peptide is influenced by the ionizable amino acid residues it contains. CAT, among the given peptides, is composed mainly of basic amino acids such as arginine and lysine. These basic amino acids have higher pKa values for their side chains, resulting in a net positive charge at lower pH values.
The pI is the pH at which a peptide carries no net electrical charge, and in the case of CAT, it is likely to be lower due to the prevalence of basic amino acids. Peptides with acidic or neutral amino acids would have higher pI values, as their side chains have lower pKa values and tend to be negatively charged at lower pH values.
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The question is inappropriate, the correct question is:
You aim to chemically synthesize four peptides with the following one-letter amino acid sequences: TIGER, PANTHER, CHEETAH, and CAT. A.Which one of these peptides will have the lowest pl? Give a reason for your answer. You are not required to calculate the pls of the peptides to answer this question.
Describe the added “costs” of sexual reproduction for an organism.
O_o
huh
-_0
Photosynthesis???????
Delayed analysis of synovial fluid affects the results of all of the following tests except the:
A. Mucin clot test
B. Glucose
C. Crystal examination
D. WBC count
Delayed analysis of synovial fluid affects the results of all of the following tests except the: mucin clot test (option A).
A mucin clot test is not necessary for the diagnosis of joint disease, but it helps in the diagnosis of pseudogout and gout. Synovial fluid analysis is a diagnostic technique that involves withdrawing synovial fluid from a joint cavity, then analyzing the fluid to diagnose joint diseases. The technique is a standard test used by physicians, particularly rheumatologists, to detect joint conditions.
What is synovial fluid analysis?Synovial fluid analysis is a laboratory test that involves examining synovial fluid samples. Synovial fluid is a clear, viscous liquid that fills the joint cavity, lubricating the joint and protecting it from friction. The liquid is produced by synovial membranes that line the inner surface of the joint capsule. Synovial fluid contains numerous substances that help in the diagnosis of joint diseases.
What are the contents of synovial fluid?Synovial fluid contains a variety of substances that help diagnose joint diseases, including:
White blood cells (WBCs), including monocytes, macrophages, and lymphocytes.
Proteins such as albumin, globulin, and fibrinogen.
Crystals, which are associated with specific types of arthritis.
Glucose, lactate, and pyruvate are all energy sources in the body.
What happens when synovial fluid analysis is delayed?Synovial fluid analysis must be done as soon as feasible after the joint is aspirated. The composition of synovial fluid changes as time passes, affecting test findings. The number of WBCs in the sample rises with time, indicating an inflammatory response. Therefore, delayed synovial fluid analysis affects all of the tests mentioned except the mucin clot test. Hence, the correct answer is Option A.
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During a field trip, an instructor touched a moth resting on a tree trunk. The moth raised its forewings to reveal large eyespots on its hind wings. The instructor asked why the moth lifted its wings. One student answered that sensory receptors had fired and triggered a neuronal reflex culminating in the contraction of certain muscles. A second student responded that the behavior might frighten predators. Which statement best describes these explanations?
Answer:
The first explanation refers to proximate causation, whereas the second refers to ultimate causation.
Explanation:
The first example refers to proximate causation, whereas the second example to ultimate causation.
What is ultimate causation?The ability of one variable to impact another is known as causality, also known as causality. The first variable might create the second or might change the incidence of the second variable.
Correlation, which shows how much two variables tend to rise or fall together, and causation are frequently misconstrued. Correlation does not, however, automatically imply causality. The variations in both variables could be caused by a third component, for instance.
A statistically significant association has been shown between yellow cars and a reduced accident frequency. Just because there are fewer accidents involving yellow cars does not mean that they are any safer. A third element, such as the person's personality type.
Therefore, The first example refers to proximate causation, whereas the second example to ultimate causation.
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which product of aerobic cellular respiration could not form in an anaerobic environment
A.) ATP
B.) Acetyl CoA
C.) Carbon Dioxide
D.) Water
How does binomial nomenclature help scientists?
help!!!
Answer:
Explanation:
Bionomial nomenclature helps scientists by helping them classify organisms. This would be a two-name system that scientists use that describes the genus and species of the organism.
You are a geneticist working at a veterinary hospital. Your job is to help people understand genetic disorders that could affect their pets.
Answer:
To be connected with pet owners.
Explanation:
For doing this job, i have to be connected with the people having pets in their houses because with this interaction I provide all information about genetic disorders that their pet can gain. I will attend group discussion with these people in order to avoid threats of genetic disorder to their pets. With this information, these people are able to diagnose any genetic disorder symptoms in their pets and if we knew on time this genetic disorder can be eliminated from their pets and their health should be maintained.
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What does this table show?
Answer:
doesn't it just show metals and non metals and their atomic number and mass number?
Explanation:
How is liver malfunction likely to affect digestion?
O A. It will affect the digestion of high-protein foods.
O B. It will affect the digestion of high-fiber foods
O C. It will affect the digestion of fatty foods.
O D.
It will affect the digestion of fruits.
Answer:
C
Explanation:
It will affect the liver because the liver helps to store fatty foods
All of the following are possible fates of fatty acid that enters the liver except: S
A. Conversion to ketone bodies
B. Conversion to acetyl-CoA for cholesterol synthesis
C. Use as an energy source
D. Conversion to triacylglycerol
E. Conversion to glucose
Conversion to glucose. Fatty acids cannot be directly converted to glucose in the liver through a process called gluconeogenesis. The correct option is E
What is Gluconeogenesis ?The liver uses a process called gluconeogenesis to convert fatty acids indirectly into glucose. The process of producing glucose from non-carbohydrate sources, such as amino acids or glycerol, but not from fatty acids, is known as glucoseneogenesis.
Fatty acids can go through a variety of metabolic processes in the liver, including being converted to ketone bodies, being used as an energy source, being converted to acetyl-CoA for the production of cholesterol, and being converted to triacylglycerol for storage or transportation. They cannot, however, be changed into glucose.
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What causes objects to change their motion? *
1 a force
2 the mass of an object
3 the velocity of an object
Answer: 1 a force
Explanation:
Answer:
answer is 1 hope this helps
where is wind energy taken from
Answer:
The sun's uneven heating of the atmosphere, changes in the earth's temperature, and the earth's rotation all contribute to wind. Wind flow patterns are influenced by mountains, bodies of water, and plants. Wind turbines work by spinning propeller-like blades around a rotor to turn wind energy into electricity.
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Why can certain drugs or viruses cause birth defects?
please help quickly i will give a thanks you will get all the points and brainliest with 5 stars
Which molecules are used for releasing energy in the cell
1. glucose, carbon dioxide and water
2glucose, oxygen and amino acids
3glucose and oxygen
4glucose and amino acids
Answer: glucose and Oxygen
Explanation: Glucose is converted to water and carbon dioxide in mitocondries and energy is released. Oxygen is needed to reaction.
Amino acids can be converted to energy but that is not primary purpose of amino acids.
What produce the type iii secretion system virulence factor?
Answer:
The genes encoding several type III secretion systems reside on pathogenicity islands, which are inserted DNA segments within the chromosome that confer upon the host bacterium a variety of virulence traits, such as the ability to acquire iron and to adhere to or enter host cells.
(first one to answer gets brainliest!), What % of wind energy does the United States use?
Answer:
Although wind makes up about 8% of total U.S. electricity generating capacity, wind generators provided a smaller share (5%) of total U.S. electricity generation in 2016 because wind turbines have relatively low capacity factors.
Explanation:
Pelvic inflammatory disease (PID) is also a risk factor for ectopic pregnancies, in which a fertilized egg implants outside the uterus. Explain the connection between PID and ectopic pregnancies. - Inflammation resulting from PID can accelerate the development of the fertilized egg, so that it is able to implant sooner before reaching the uterus. - PID damages the ciliated epithelium lining the uterine tubes, making it more difficult for the fertilized egg to reach the uterus. - Fertilized eggs are more likely to implant in the uterine tubes that are inflamed because of the extensive blood supply. - PID causes scarring of the uterine tubes, which can obstruct the passage of a fertilized egg to the uterus where it would normally be implanted.
The connection between pelvic inflammatory disease (PID) and ectopic pregnancies is that PID can damage the ciliated epithelium lining the uterine tubes, making it more difficult for the fertilized egg to reach the uterus. Additionally, PID can cause scarring of the uterine tubes, which can obstruct the passage of a fertilized egg to the uterus where it would normally be implanted.
PID is an infection of the reproductive organs, typically caused by sexually transmitted bacteria. Inflammation resulting from PID can damage the ciliated epithelium lining the uterine tubes, impairing their ability to move the fertilized egg toward the uterus. This increases the risk of the fertilized egg implanting in the fallopian tubes or other locations outside the uterus, resulting in an ectopic pregnancy.
Furthermore, PID can cause scarring of the uterine tubes, creating physical obstructions that prevent the fertilized egg from reaching the uterus, leading to an increased likelihood of ectopic pregnancies. Therefore, the correct answer is that PID causes scarring of the uterine tubes, which can obstruct the passage of a fertilized egg to the uterus where it would normally be implanted.
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Solar Energy Supply Part 3 0.0/5.0 puntos (calificado) How much land would be required if the solar installations were in the much-less-sunny northeast US, producing 7.5W/m² on average? sq km Enviar
X MW / 0.0000075 MW/km² land area would be required if the solar installations were in the much-less-sunny northeast US, producing 7.5W/m² on average.
To calculate the land required for solar installations in the much-less-sunny northeast US, producing an average of 7.5W/m², we need to consider the energy output per unit area and the total energy demand.
Let's assume that the total energy demand in the northeast US is X megawatts (MW). To convert this demand into the required land area, we need to divide the total energy demand by the average energy output per unit area.First, we need to convert the average energy output from watts per square meter (W/m²) to megawatts per square kilometer (MW/km²). Since 1 MW is equal to 1,000,000 W and 1 square kilometer is equal to 1,000,000 square meters, we can convert the average energy output as follows:
7.5 W/m² = 7.5/1,000,000 MW/km² = 0.0000075 MW/km²
Next, we divide the total energy demand (X MW) by the average energy output per unit area to find the land area required:
Land area required = X MW / 0.0000075 MW/km²
The resulting value will be in square kilometers (km²), which represents the land area required for the solar installations in the much-less-sunny northeast US to meet the energy demand.
It's important to note that the exact total energy demand and the specific conditions of the solar installations may vary, so this calculation provides a general approach to estimate the land area required based on the given average energy output per unit area.
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Where does the growth of plants occur.
Answer:
the tips of the steams and roots, also known as an apices
Answer:
The growth in plants can occur in or as the stems and including the roots lengthens or grows. Thus, some plants and including the ones that are woody, Which can increase in thickness during their life span. The increase causes in length or the growth of the shoot and of course the root., which is mostly referred as primary growth. This is the result of a cell division in the shoot apical meristem.