A radio wave with a wavelength of 10 meters and has a frequency of (300,000,000 / 10) = 30 MHz.
300,000,000 meters = 186,282 miles
A radio wave with a wavelength of 10 miles has a frequency of (186,282 / 10) =
18,628 Hz.
why are international environmental laws needed?
International environmental laws are needed in order to ensure that the whole world is protected from environmental degradation.
Many pollutants can migrate from the sources where they are released to other places, very distant from the point of release. Often times, pollutants do not recognize international boundaries.
Pollutant gases released in one country may still be detected in another country far away from the country where the gases were released.
As a result of this, it is important to have international laws that set limits concerning the maximum allowable concentration of certain pollutants that can be discharged into air, water or land.
By so doing, the whole world will be protected from the harmful effects of dangerous pollutants.
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Water has a boiling point of 100 degrees Celsius . Arctic acid has a boiling point of 117.9 degrees Celsius both substances are colorless liquids how could you use this information to determine which of two unknown substances is acetic acid
Pour each into a separate container and heat them both up to 100 degrees Celcius. The one that boils is water.
Answer:
heat each substance to 100 degrees Celsius and check for gas beging formed
Explanation:
are data that do not support a hypothesis useful ?
Yes. Because the hypothesis is just a proposed explanation pending further investigation. So new data could prove hypothesis wrong.
Answer:
Yes, data that does not support a hypothesis is useful.
Explanation:
As you may already know, a hypothesis is an assumption about something, about some phenomenon, or about a situation. This assumption must be credited or discredited through experiments that will generate data that may support the hypothesis or not support the hypothesis.
In all cases, the data is useful. Data that support the hypothesis prove that the hypothesis is true and can stop being a speculation, to be a truth. On the other hand, data that do not support the hypothesis are useful because they take away the credibility of the speculation, showing that it cannot be carried forward, since it is not true.
Plz help with this science qurstion
I would hope about 50% of the energy you get back from eating something
Identify 3 limitations of the tri-component model. (Psychology)
thanks, heaps!
There is usually discrepancy with behaviors and attitudes of the individuals.
That is the reason there are the attitudes in which effective component, behavioral component and cognitive components. The sensitive and emotional reactions or feelings of an individual with one another. Though when an individual behaves with others through actions. The third limitation is when a person has a belief about anything.These above are three limitations of the tri-component model.
The tri-component model has limitations such as oversimplification of attitudes, neglect of situational factors, and potential lack of predictive power for behavior.
The tri-component model in psychology, also known as the ABC model, posits that attitudes consist of three components: affective (emotions), behavioral (actions), and cognitive (beliefs). While this model is helpful for understanding attitudes, it does have several limitations:
Oversimplification: The model may over-simplify the complex nature of attitudes by assuming that the three components always align. In real-life scenarios, these components can sometimes be inconsistent with one another.Neglect of situational factors: The tri-component model tends to overlook the influence of situational factors on attitudes and behavior. People's actions can vary greatly depending on the context, which the model doesn't fully account for.Lack of predictive power: The tri-component model may not always accurately predict behavior. Although attitudes can influence behavior, other factors like social norms and individual differences can also play a significant role.In summary, while the tri-component model offers a valuable framework for analyzing attitudes, it is limited by its potential oversimplification, neglect of situational influences, and occasional lack of predictive power regarding behavior.
please help ! the picture is attached
The answer is c,b,d,a hope this helps
What describes the cell?
A.a bacterial cell with nucleus
B. An an animal with nucleus
C.an animal cell without nucleus
D.a bacterial call without nucleus
Animal cell with nucleus.
ExplanationThe picture shows a cell with a membrane-bound nucleus showing it as an animal or eukaryotic cell. The Nucleus of the eukaryotic cell contains a large amount of DNA in its nucleolus. In addition another membrane- bounded organelles can also be seen in this cell which the bacterial cell lacks.
Answer: Animal Cell with nucleus
Explanation: The picture shows a cell with a membrane-bound nucleus showing it as an animal or eukaryotic cell. The Nucleus of the eukaryotic cell contains a large amount of DNA in its nucleolus. In addition another membrane- bounded organelles can also be seen in this cell which the bacterial cell lacks.
The town of Alpine Glen lies at the base of a mountain and next to the Alpine River. In recent months, the people of the town have noticed that the river has become much muddier, and that silt deposits have been building up along the river banks. Which of the following changes to the environment is the most likely cause of the change to the Alpine River?
A. Trees were cleared from a mountainside, causing an increase in soil erosion. B. Cattle or other livestock were introduced to the mountain, causing an increase in soil erosion.
C. A new dam began operating on the river, causing soil to be added to the water.
D. A new power plant increased the river temperature, causing the erosive force of the water to increase.
The answer is A because since the trees are being cut the soil runs off to the river banks
Answer:
Option A, Trees were cleared from a mountainside, causing an increase in soil erosion
Explanation:
The reason behind Alpine river getting muddier is that the surface runoff from the near by catchment areas consist of increased content of soil, clay, silt and debris.
This is possible only when the soil in the surrounding regions is loose enough to be carried away by water. And this is possible only when the trees in the near by areas are cut at a fast rate thereby leaving loose soil behind.
This loose soil is carried by water which drains into Alpine river and thus makes it muddier
Hence, option A is correct
According to the American Psychological Association, which of the following is not among the top sources of stress for Americans?
Work
Health
Money
Education
Answer:
Education
Explanation:
Education is not among the top sources of stress for Americans according to the American Psychological Association. The American Psychological Association is an organization that represents psychologists in the United States. The APA researches various matters like abortion, human rights, detainees and so on. In 2010, the APA conducted a survey on stress and their findings include there is high stress in America; self-care isn’t a priority and lack of will power and concludes that work, health, and money are the top sources of stress in America.
Whole grains, like oats, barley, and wheat, are good sources of the B-complex vitamins. These foods are also considered very good sources of energy. Why would whole grains be good sources of energy? A. They are rich in fats, which can only be transported to energy-producing cells with the help of B-complex vitamins. B. They are rich in fats, which are broken down and stored in the body through processes that require B-complex vitamins. C. They are rich in complex carbohydrates which provide energy, and their B-complex vitamins are important for transporting these carbohydrates to cells that need energy. D. They are rich in complex carbohydrates which can be broken down for energy, and their B-complex vitamins are involved in metabolic processes that release this energy.
i do believe the answer is d for one wheat and other barley products are not made of fats but carbs. and they are really good for energy because it can be broken down alot slower than many other energy sources.. hope this helps.
The correct answer is option D.
Whole grains like wheat, oats and barley are good sources of B-complex vitamins, these are very good source of energy because they are complex carbohydrates and when these complex carbohydrates are broken down into simpler carbohydrates it helps in energy production. B- complex vitamins serves as co enzymes in the metabolic processes of the body.
While working in a lab you drop an empty flask on the floor and it breaks what is the appropriate action to take
use gloves a towle clean it up. put it in a little bag and throw it away. gloves are so you don't damage your hands from the chemicals.
Final answer:
In the lab, after breaking a flask, notify your teacher, sweep up the broken glass if safe to do so, and dispose of it in the designated broken glass container. Safety protocols, including wearing closed-toe shoes and keeping the work area clean, should always be followed.
Explanation:
Appropriate Action After Breaking a Flask in the Lab
If you drop an empty flask on the floor and it breaks, the appropriate action is to immediately take steps to ensure everyone's safety and properly dispose of the broken glass. First, notify your teacher about the accident. Then, if given permission and it's safe to do so, use a broom and dustpan to sweep up the broken glass. Dispose of the glass in the designated broken glass container within the lab. It is crucial to always follow the safety protocols provided by your teacher to maintain a safe working environment. Additionally, wearing closed-toe shoes and avoiding loose clothing can help prevent accidents. Remember, you are responsible for your own safety and the safety of others in the laboratory.
As a general rule, keep your work area neat and clean to prevent incidents like this. And remember to never eat or drink in the laboratory, as this can lead to chemical exposure. In the case of any chemical spills, control the spill by first putting on personal protective equipment (PPE) and then follow the correct spill control procedures.
What is the purpose of the plasma membrane
he plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell. hope this helped!
Identify the advantages and disadvantages of renewable and Nonrenewable resources
Renewable energy is generally defined as energy that is collected from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy often provides energy in four important areas: electricity generation, air and water heating/cooling, transportation, and rural (off-grid) energy services.
A non-renewable resource (also called a finite resource) is a resource that does not renew itself at a sufficient rate for sustainable economic extraction in meaningful human time-frames. An example is carbon-based, organically-derived fuel. The original organic material, with the aid of heat and pressure, becomes a fuel such as oil or gas.
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The nurse is caring for a 24 hour post-partum client receiving heparin prophylactically for a history of DVT. List one (1) possible complication related to heparin therapy and the appropriate nursing considerations for that complication.
Heparin also called unfractionated heparin, it refers to a medicine that is used as a blood thinner (anticoagulant). It is mainly used in the prevention and treatment of deep vein thrombosis, arterial thromboembolism, and pulmonary embolism. It is also used in the treatment of unstable angina and heart attacks.
However, one of the possible issue with the heparin therapy is hemorrhage, that is, frequent loss of blood inside the body, also known as internal bleeding. In such a case, one has to discontinue the use of heparin.
Hemorrhaging is a potential complication of heparin therapy, and nurses must closely monitor vital signs and bleeding indicators, regularly check aPTT levels, educate the patient about symptoms, and be prepared to administer protamine sulfate if necessary.
One possible complication related to heparin therapy is hemorrhaging, which involves bleeding that may occur due to the over-thinning of the blood. The appropriate nursing considerations for this complication include:
Monitoring the patient's vital signs frequently to detect any early signs of bleeding, such as a drop in blood pressure or changes in heart rate.Regularly assessing for signs of bleeding, including checking for bruising, hematuria (blood in the urine), or melena (black, tarry stools).Ensuring laboratory tests like activated partial thromboplastin time (aPTT) are checked to monitor the therapeutic range of heparin and to adjust dosages as necessary.Educating the patient on the importance of reporting any unusual bleeding or bruising.Preparing to administer protamine sulfate, which is a medication used to reverse the effects of heparin in case of excessive bleeding.Overall, vigilance in monitoring and prompt response to any signs of bleeding can mitigate the risks associated with heparin use in post-partum patients.
Seeking shelter form the cold is an example of an
Hello there!
Seeking shelter from the cold is an example of Response to Temperature.
This all started with something called Negative Feedback which is a reaction that causing a return to Homeostasis. An example of a negative feedback is thermoregulation of someone's in a situation of being too cold. Thermoreceptors in your skin which are the receptors, send the information that the person is too cold to the Hypothalamus which is the control center. The control center analyzes the information and sends signals through the nervous system to the blood vessels, which are the effectors. Then Vasoconstriction occurs by causing the person to gain heat and return to homeostasis.
Thus, when your body is cold and you are looking for shelter or a blanket or whatever, your body is telling you that. That's how you know if you are too cold or not. This all happened with the three components of the negative feedback, which are the receptors, control center, and the effectors.
As always, it is my pleasure to help students like you.
~Dr. Gary
If two people with wavy hair have offspring what percent of their offspring would you excpect have wavy hair?
A 100%
B 75%
C 50%
D 25%
Hi there! The correct answer is C. 50%.
Which of the following would be the best way to demonstrate the motion of plates near a divergent fault, using your hands? A. pulling your hands apart B. sliding one hand over the other C. making a fist with each hand, then stacking them D. keeping hands level and parallel to each other, moving one ahead of the other
I think the answer is A
Answer:
A. Pulling your hands apart.
Explanation:
A divergent fault is where two tectonic plates move apart from each other.
How is information converted into translation
I think it would be A. From nucleic acids to amino acids.
Hope this helped!
Translation in biology refers to the process where the genetic code from mRNA is deciphered by ribosomes to produce proteins through initiation, elongation, and termination steps.
Translation is the biological process by which the genetic code contained in mRNA (messenger RNA) is read by a ribosome to synthesize a specific protein. This process is crucial for gene expression in all living organisms. Translation can be broken down into several key steps:
Initiation: The ribosome assembles around the target mRNA. The first tRNA is attached at the start codon.Elongation: The ribosome continues to translate the mRNA, one codon at a time, and individual amino acids are added by their corresponding tRNAs (transfer RNAs) to the growing polypeptide chain.Termination: The process ends when a stop codon is reached, and the ribosome releases the completed polypeptide.This conversion from nucleotides to amino acids involves not only the ribosomes and tRNAs but also numerous other enzymes including aminoacyl-tRNA synthetases which play a role in the activation of amino acids.
In summary, translation is the information conversion process that synthesizes proteins by decoding the sequence of nucleotides in an mRNA into a specific sequence of amino acids in a protein.
Density worksheet which will float on water. A. Air, b. Corn oil,c. Glycerine, d. Corn syrup, e. Wood, f. Steel, g. Rubber, h. Ice, i. Water
What does gel electrophoresis do?
Gel electrophoresis is a technique used to separate molecules like DNA, RNA, or proteins according to size and charge, by applying an electric field. The molecules move through a gel which acts as a sieve, allowing size-based separation, and the results are visualized using specific dyes.
Explanation:Gel electrophoresis is a laboratory technique used to separate DNA, RNA, or proteins based on their size and charge. The process involves using a gel as a filter to sort the molecules as they are forced through it by an electric field. Because nucleic acids and proteins have different charges under certain conditions, they will move through the gel at different rates. DNA, for example, possesses a net negative charge due to the phosphate groups along its backbone, making it migrate towards the positive electrode. Shorter DNA fragments move through the gel faster than the longer ones due to the gel's sieving effect, allowing for the separation based on size. After the electrophoresis, these separated fragments appear as bands on the gel which can then be stained with a specific dye to make them visible for analysis.
How is the theory of evolution an example of a scientific theory
The theory of evolution is a scientific theory based on thorough testing and verification. It describes the facts about the living world and has withstood significant efforts to discredit it. The theory provides a framework for understanding and predicting the diversity of life on Earth.
Explanation:The theory of evolution is a scientific theory because it is based on thorough testing and verification. In science, a theory is a well-supported explanation for a set of observations, and the theory of evolution describes the facts about the living world. This theory has withstood significant efforts to discredit it and is widely accepted among scientists. It provides a framework for understanding and predicting the diversity of life on Earth.
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substances like oxygen pass through the cell without the use of energy and move from an area of high concentration to an area of low concentration. this process is called what?
This process is known as diffusion.
Explanation:Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. It happens in liquids and gases because their particles move randomly from place to place.It does not require energy as it is a passive transport.According to above information the transport of oxygen in cells from high concentration to low concentration is diffusion.Use the pubic hunting menu to visit the public hunting page. What resources must a hunter use to have the correct WMA regulations
They must have a management area hunting permit, also a hunting licenses-Good luck!
A hunter needs to use the official state wildlife agency website, physical hunting guides and rulebooks, and local experts to have the correct WMA regulations.
Explanation:To have the correct Wildlife Management Area (WMA) regulations, a hunter must utilize a range of resources. Firstly, the official state wildlife agency website usually lists the most updated and comprehensive WMA regulations. Also, physical copies of hunting guides and rulebooks often provide WMA rules, typically available at hunting supply stores, parks, and wildlife agency offices.
Furthermore, there are sometimes locally-specific regulations that vary from one WMA to another. Thus, consulting with local wildlife officers or other local hunting experts could be necessary and helpful.
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Why do some dna fragments move farther than others during gel electrophoresis ?
The DNA fragments having shorter size than other move faster than other.
Explanation:Gel electroscopes is a technique used to separate DNA fragments according to their size. DNA samples are loaded into wells at one end of a gel, and an electric current is applied to pull them through the gel. DNA fragments are negatively charged, so they move towards the positive electrode. Hence short fragments having less number of nuecleotides move faster than long fragmentas.
Because their masses are different
The graph shows how the activity of an enzyme changes at different temperatures. Which statement best describes what happens to the enzyme when the temperature of the reaction increases to 63°C?
A
The enzyme is used up and the reaction reverses.
B
The enzyme begins to decrease the rate of the reaction.
C
The enzyme continues to increase the rate of the reaction.
D
The enzyme changes shape and can no longer speed up the reaction.
Answer
D..The enzyme changes shape and can no longer speed up the reaction.
Explanation:
We are a graph which shows the activity of an enzyme changes at different temperatures.
We have to find that which statement describe what happens to the reaction increases to 63 degrees.
We know that enzymes are biological catalyst and made from proteins .
It does not change in the reaction.
Catalyst increase the rate of reaction but do not any change in the reaction.
Therefore , when temperature increase then rate of reaction increases upto optimized level and then decreases when temperature increases.
Hence,option D is true.
what do you think are some of the limiting factors for rabbit population
Limiting factors for rabbit population include density-dependent factors such as resource availability competition and diseases and density-independent factors like harsh weather and pollution. Genetic drift and differential survival and reproduction related to physical traits can also significantly impact the population.
Explanation:The rabbit population can be influenced by several factors categorized as density-dependent and density-independent. Density-dependent factors include resource availability and competition, predation, disease spread, and maternal stress due to crowding which can lower fecundity. The number of offspring and survival rates can decrease when the population gets too dens slowing the rate of population growth. Density-independent factors are typically abiotic elements like weather natural disasters and pollution. These conditions can cause mortality regardless of population density. For example, a harsh winter could equally affect a small or large rabbit population.
Genetic factors can also play a significant role in rabbit population dynamics. The introduction of new individuals can cause genetic drift. For example if several white rabbits migrate into a population of brown rabbits, the number of individuals with white fur allele in the population would increase. Also, differential survival and reproduction can cause genetic drift. If white rabbits are more conspicuous to predators and thus are more frequently preyed upon, the frequency of white fur allele might decline in the population.
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1) Which biome has the most extreme conditions? EXPLAIN your answer!
The Tundra.. IT HAS THE COLDEST TEMPS.
The Tundra is the most extreme condition
Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.
occurs in
organisms that
sexually reproduce
occurs during
growth and
development
the DNA is
replicated
occurs in
all organisms
the number of
chromosomes
remains the same
the number of
chromosomes
reduces by half
Occurs in organisms that sexually reproduce ==> Occurs in meosis.
Meiosis is a type of gamete-specific nuclear division.
Meiosis occurs during spermatogenesis and oogenesis (egg formation in women).
In order for the number of chromosomes, characteristic of the species, to be conserved, it is necessary that before the encounter, the number of chromosomes of each of the reproductive cells be divided by two.
The reduction in the number of chromosomes takes place during the phenomenon called "meiosis".
Occurs during growth and development ==> It concerns mitosis.
Mitosis will ensure the good fulfillment of several phenomena:
. embryonic development,
. the general growth of organisms from birth to adult size,
. continued growth of certain organisms and / or organs; for example, trees, hair, teeth in ruminants, nails, ...
The DNA is replicated ==> concern both mitosis and meiosis.
The cell cycle of eukaryotic cells is as follows:
• Interphase (normal functions, DNA replication)
G1 - growth / cellular activity
S - DNA synthesis / replication
G2 - preparation for division
• Phase M (cell division): which consists of either mitosis or meiosis, depending on cell types.
• Cytocinesis (cytoplasmic division).
So whether it is mitosis or meiosis, both are preceded by a replication of the genetic material (DNA)
Occurs in all organisms ==> concern both mitosis and meiosis.
An organism is a set of elements that make up a functional structure.
In biology, the term organism designates a living being as it is organized, that is to say composed of different organs or organelles forming a coherent whole (as opposed to micro-organisms).
All multicellular organisms have sexual reproduction, so their cells are systematically mitosis and meiosis.
We exclude microorganisms of which a very small part of them have asexual reproduction.
The number of chromosomes remains the same : concerns only mitosis.
During mitosis, the human cell has 2n monochromatid chromosomes. In phase S consists of a doubling of the amount of DNA indeed, and the cells then have 2n chromosomes bichromatidiens. In the metaphase of mitosis, the chromosomes of the mother cell are arranged on a "metaphase plate", then split in 2-chromosomes, but monochromatids, during anaphase. Each daughter cell therefore has 2n monochromatid chromosomes.
The number of chromosomes reduces by half ==> Concerns only meiosis
Meiosis unfolds in two stages:
* The first meiotic division is called reductional because it allows to pass from 2n double chromosomes to n double chromosomes.
* The second is called equational because it preserves the number of chromosomes: one passes from n double chromosomes to n simple chromosomes.
Meiosis thus allows the formation of 4 haploid daughter cells (or gametes).
In humans, a normal cell contains 2n = 46 chromosomes (thus 23 pairs) while a gamete contains n = 23 chromosomes in two divisions).
Both mitosis and meiosis occur in organisms that sexually reproduce, and in these processes, the DNA is replicated. Mitosis is specific to growth and maintaining the same number of chromosomes as in the parent cell. Meiosis is characterized by the reduction of chromosomes by half.
Explanation:The given descriptions can be associated in the following manners:
"Occurs in organisms that sexually reproduce" - This is true for both mitosis and meiosis. "Occurs during growth and development" - This is closely related to mitosis as it is a process for growth and repair in almost all organisms. "The DNA is replicated" - This process happens in both mitosis and meiosis. "Occurs in all organisms" - This also is true for both, as mitosis happens in prokaryotic and eukaryotic cells and meiosis is prevalent in sexually reproducing organisms. "The number of chromosomes remains the same" - This is specific to mitosis, where the daughter cells have the same number of chromosomes as the parent cell. "The number of chromosomes reduces by half" - This is a characteristic of meiosis, as it produces sex cells (gametes) with half the original number of chromosomes. Learn more about Mitosis and Meiosis here:
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Which of these energy resources is likely to be depleted if these trends continue? A) Coal B) Timber C) Petroleum D) Natural Gas
D) Natural Gas i think is correct sorry if im wrong
Final answer:
Based on the provided information and current trends, petroleum is the energy resource likely to be depleted first, with estimates suggesting exhaustion of known reserves in about 60 years.
Explanation:
Considering the provided information that estimates known reserves of petroleum to be exhausted in about 60 years, and the fact that coal and natural gas have a relatively more abundant supply, petroleum (C) is the correct answer. Natural gas is estimated to run out in about 120 years, and coal is plentiful, comprising over 90% of the world's fossil fuel reserves.
Moreover, coal as a solid is more difficult to mine and ship than petroleum or natural gas, which may also contribute to petroleum being used up first. Thus, based on the information provided, petroleum is the energy resource most likely to be depleted sooner as compared to the others listed.
Food shortages, natural disasters, disease, and ____ can reduce population size
Job shortages maybe? It would be a little easier if therewas a selection of coices in this case
Answer:
The correct answer would be - predation.
Explanation:
Predation is one of the limiting factors other than food, natural processes, shelter, temperature, and many others affect the population size. Predation is a relationship between these organisms, where a predator and eats the other organism that is prey.
Decrease in the population size can be caused by these limiting factors such as shortage in food, natural disasters, shelter, and predation.
Thus, the correct answer would be - predation.