Final answer:
Humans can hear frequencies ranging from 20 Hz to 20,000 Hz, with sounds below and above this range being classified as infrasound and ultrasound, respectively.
Explanation:
The approximate range of frequencies that humans can hear is from 20 Hz to 20,000 Hz. This range defines what is audible to the human ear; sounds with frequencies below 20 Hz are classified as infrasound, while those above 20,000 Hz are considered ultrasound. It's interesting to note that different species have varying ranges of hearing. For example, dogs can hear up to about 45,000 Hz, and bats and dolphins can detect frequencies as high as 110,000 Hz. In contrast, frequencies such as those produced by dog whistles are inaudible to humans but can be heard by dogs.
In which group would you put pasta and breads according to the mypyramid plan?
Answer:
Grains group
Explanation:
MyPyramid is a plan by the US government which has a set of recommendations to be followed for a diet and exercise and these are based on the dietary guidelines for Americans 2005.
The MyPyramid plan is intended to make the American citizens more aware of the nutrition that they are getting and the food they are eating.
There are a total of 7 categories in which the recommendations are made and these are: grains, vegetables, fruits, milk, meat and beans, oils, discretionary calories, and physical activity.
Out of these the pasta and bread are placed in the grains category.
A pattern has 5 blue triangles to every 80 yellow triangles.what is the ratio of blue triangles to all triangles
When the baby lies crosswise in the uterus during delivery, this is called?
ll theories are hypotheses, but not all hypotheses are theories. Francis wants to know if a specific hypothesis he is researching is a theory. Which describes how Francis would know the hypothesis is a theory? He could restate the hypothesis as a fact and no longer an explanation. He could determine whether the hypothesis is based on repeated experiments. He could perform the experiment and adjust data to match the desired results. He could design and perform a new controlled experiment to test the hypothesis.
Answer:
b
Explanation:
What is the main difference between aerobic respiration and anaerobic respiration?
the answer is , A . Aerobic respiration requires oxygen to proceed, but anaerobic respiration does not
How should a downed deer or other large animal be approached?
When a person is about to approach a large animal or downed deer, it is important to be calm and to approach it slowly to prevent it from having to run and to feel scared, it is also best to approach it from behind.
The question and answer focus on the appropriate way to approach a downed deer or other large animal. The key points suggest remaining stationary until the animal isn't going to move and to consider the overall balance of the ecosystem when making decisions about the animal.
Explanation:When approaching a downed deer or other large animal, it's important to proceed with utmost caution. One should first stop moving and become stationary until it's clear that the animal isn't going to move. Preserving the balance of the ecosystem and avoiding unnecessary disturbances to the animal are key.
Practices that impact the number of predators, the availability of nutrients in the soil, and the number of pests should be taken into account. Any drastic changes in these factors could indicate that indiscriminate hunting of deer or other large animals should be discouraged.
This allows for the prevention of imbalances in the food chain and the overall ecosystem.
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A novel synchronized diastolic injection method to reduce contrast volume during aortography for aortic regurgitation assessment: in-vitro experiment of a transcatheter heart valve model
The ______________ functions as the main link between the nervous system and the endocrine system. thyroid gland pituitary gland hypothalamus adrenal gland
The part of the peripheral nervous system that controls the movement of your legs when you wa
The three natural processes that form the basis for evolution are
"what mistaken notion about the nervous system persisted from ancient times up through the work of some renaissance thinkers?"
The nurse observes a client in a group who is reminiscing about his past. which effect should the nurse expect reminiscing to have on the client's functioning in the hospital?
Reminiscing can positively affect the patient's functioning in a hospital by offering emotional comfort, enhancing social interactions, and exercising memory and cognitive function. Cognitive tasks such as the three-word recall test or reversing the monthly sequence can help exercise this.
Explanation:For a patient in a hospital setting, reminiscing about their past can have various positive effects on their functioning. It can provide emotional solace, improve mood, and enhance social interactions. Moreover, reminiscing is a valuable tool to stimulate memory and cognitive function, so it could potentially help the client on certain cognitive tasks in order to slow cognitive decline.
Specific cognitive tasks, like the three-word recall test or reversing the months of the year, aim to exercise the patient's memory and cognitive ability. In the three-word recall test, a patient is asked to remember and then recall three words, such as book, clock, and shovel, after some time. Similarly, asking the patient to recite the months in reverse order helps to avoid the habitual sequence and challenges the memory and cognitive function of the patient.
In conclusion, reminiscing can play an important role in a client's cognitive maintenance and provide emotional comfort, thereby improving the overall hospital experience.
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Which two characteristics describe reputable digital resources
Answer:
Reputable digital resources must be
a) accurate
b) Authorized
Explanation:
Two characteristics which describe reputable digital resources are
1. A reputable digital resources must be accurate – The information provided by a digital resources must be reliable and free from error else its authenticity becomes questionable.
2. A reputable digital resources must have a authorship of its website. Thus all the information provided on the website must be referenced. A good web source must have a contact production person.
Suppose you had found that tina’s pupils were reactive to both direct and consensual light, yet unequal in size. which condition would you suspect
What type of tissue makes up the outer covering and lines organs of animals?
According to the kinetic molecular theory, the pressure of a gas in a container will increase if the A) number of collisions with the container wall increases. B) number of moles of the gas decreases. C) temperature of the gas decreases D) volume of the container increases.
Answer: A) number of collisions with the container wall increases.
Explanation: Pressure is defined as the force acting per unit area.
It is caused due to bombardment of gas molecules on the walls of the container.
Kinetic molecular theory states that:
1. Gases consist of large number of small particles.
2. Collision between gas particles and between particles and container walls are elastic collisions .
3. Gas particles are in continuous motion.
4. There are no forces of attraction between gas particles .
5. The temperature of a gas depends on the average kinetic energy of the particles of the gas.
According to the kinetic molecular theory, the pressure of a gas in a container will increase if the number of collisions with the container wall increases. This is because more frequent and forceful collisions result in higher pressure. The correct answer is A. the number of collisions with the container wall increases.
According to the kinetic molecular theory, the pressure of a gas in a container will increase if the:
The number of collisions with the container wall increases.The explanation can be understood through these key concepts:
Kinetic molecular theory: Gas pressure is caused by collisions between gas molecules and the container walls.
Amontons's Law: If the temperature is increased, the average speed and kinetic energy of the gas molecules increase, leading to more frequent and forceful collisions, thus increasing the pressure.
Boyle's Law: If the volume of a gas is decreased, the molecules will collide more frequently with the container walls, increasing the pressure.
Therefore, the correct choice is A) the number of collisions with the container wall increases.
Can you support the organization of life based on the atom as the basic unit of matter?
The outer layer of cells that will form the structures that will provide protection and nourishment for the newly formed organism is the ____.
Each level of the energy pyramid captures about _______ percent of the energy found in the level below it.
What are the chemical differences between the cell walls of gram positive and gram negative bacteria that might explain differences in the rate of decolorization?
The cell wall is the layer that lies outside the plasma membrane. The chemical difference between the cell walls of gram positive and gram negative bacteria are as follows-
Gram positive bacteria
The cell wall of gram positive bacteria is thick as compared to the gram negative bacteria. It consist of a single 20-80nm thick peptidoglycan layer.Gram negative bacteria
In gram negative bacteria the cell wall comprises of peptidoglycan layer and outer membrane. The peptidoglycan layer is 2 to 7 nm thick and it is covered by a 7 to 8 nm thick outer membrane.During staining procedure the bacteria are first stained with crystal violet and then treated with the iodine to promote dye retention. After this When gram positive bacteria are treated with alcohol (ethanol) for decolorization, the alcohol shrinks the pores of the thick peptidoglycan cell wall, which retains the crystal violet dye-iodine complex and the gram positive bacteria remains purple. However, the peptidoglycan layer of gram-negative bacteria is thin and has large pores because of which alcohol easily removes the crystal violet dye-iodine complex from the cell wall and gets easily counterstain by safranin.
So, the rate of decolorization in gram negative bacteria is faster than the rate of decolorization in gram positive bacteria due to the presence of thin peptidoglycan layer in gram negative bacteria.
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Final answer:
The cell walls of gram positive bacteria contain thick layers of peptidoglycan and teichoic acids, retaining crystal violet dye, whereas gram negative bacteria have a thin peptidoglycan layer and an outer membrane with LPS, decolorizing faster and taking up safranin dye.
Explanation:
The major chemical differences between the cell walls of gram positive and gram negative bacteria involve the structure and composition of their cell walls, which impacts the rate of decolorization. Gram-positive bacteria have thick layers of peptidoglycan, which retain the crystal violet dye during the Gram staining procedure, making them appear purple. They also contain teichoic acids, which gram-negative bacteria lack. Conversely, gram-negative bacteria have a much thinner layer of peptidoglycan and possess an outer membrane that contains lipopolysaccharides (LPS). This outer membrane dissolves during the alcohol wash in the staining process, allowing the crystal violet dye to escape. Afterwards, these cells take up the pink dye safranin and appear pink. The presence of LPS in the outer membrane of gram-negative bacteria also gives them the ability to release endotoxins.
On the food label, the % daily value table compares key nutrients per serving for a person consuming how many calories daily?
The process in which yeast produces carbon dioxide and alcohol is called ________ fermentation
Approximately __________ of the world population lives within a few tens of kilometers of the oceans.
which is a negative result of eating too much lipids
A. The body produces too many membrane structures
B. fatty acids become deficient in the body.
C. dangerous fat-soluble vitamins are carried to cells
D. fat deposits put a strain on the body
Ans.
Lipids are complex, organic biomolecules, that perform various functions in the body, such as membrane synthesis, energy storage, and heat insulation. Excessive deposition of fat molecules in the body, due to eating too much lipids is called as obesity.
One of the negative impact of eating too much of lipids involves strain in circulatory system, heart, and on other body organs. It can lead to various heart-related problems, such as heart attack.
Thus, the correct answer is option). D.
Answer:
D. fat deposits put a strain on the body
Based on what you know about the relative temperatures of Earth’s geological layers, what can be said about the crust, mantle, and core of other terrestrial planets? For any terrestrial planet, the would be the coolest layer, and the would be the hottest layer.
Answer:
Any terrestrial planet has highest temperature at its core and least temperature at its crust.
Explanation:
Considering the composition of earth, there are three main layers whose composition and temperature is given as follows –
a) Inner Core – The inner core is made up of iron and nickel and has a temperature of 7200 degree Celsius.
b) Molten Outer core – It is also made up of iron and nickel and has a temperature of 4300 degree Celsius.
c) Inner mantle – It is semi rigid and made up of silicon, oxygen, magnesium, iron, aluminum, and calcium and has a temperature of 3700 degree Celsius
d) Crust – It is made up of water, basalt and granite and has a temperature of 0 degree Celsius
Thus, looking at the composition and temperature of different layers of earth , it can be said that any terrestrial planet has highest temperature at its core and least temperature at its crust.
Which factor has greatest importance in determining the characteristics of an aquatic ecosystem? A. day length B. water depth C. angle of sunlight D. average precipitation
The correct answer is option B, that is, water depth.
An aquatic ecosystem refers to an ecosystem, which is found in water. There are various kinds of the aquatic ecosystem, that is, lakes, rivers, wetlands, ponds, deep oceans, and shallow seas.
The chemical or physical components of the environment, which influences the species that are thriving in particular surroundings are known as the abiotic factors. In the case of aquatic ecosystems, the abiotic factors are the flow rate of water, the intensity of light, temperature, acidity, dissolved oxygen, salinity, and water depth.
Of these water depth plays the most significant role in determining the characteristics of aquatic ecosystems. The intensity of sunlight and the availability of the dissolved oxygen to the species depends on the depth of water in an aquatic ecosystem.
An important aspect of color-blind racism is ________.
An important aspect of color-blind racism is the elimination of discrimination.
Color blindness is one of the terms used by the U.S. Supreme Court in various cases involving race and social justice, particularly in the context of public education.
Racial colorblindness is a racial ideology that argues that the most effective way to eliminate discrimination is to treat people as equally as possible, regardless of their race, culture, or ethnicity.
At first blush, this belief seems not only to ignore the experiences of individuals of color but also to deny the existence of racism as long as it is ignored.
However, in the context of ongoing structural and systemic racism, racism colorblindness is often used as a way to completely disengage from discussions about race and racism.
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convert 29.7 cm to inches. Show your dimensional analysis setup
To convert centimeters to inches, we can use the conversion factor of 1 inch = 2.54 cm.
Here's the dimensional analysis setup:
[tex]29.7 cm * 1 inch/2.54 cm = 11.69 inches[/tex]
So, 29.7 cm is equal to 11.69 inches.
What is metric conversion?
Metric conversion is the process of converting a quantity from one metric unit to another. The metric system is a system of units for measuring physical quantities that is widely used in science and commerce around the world. In the metric system, there are standard units for length, mass, time, and other physical quantities.
Metric conversion involves using a conversion factor to change from one unit to another. For example, to convert meters to kilometers, you can use the conversion factor of 1 kilometer = 1000 meters. The conversion factor is used to multiply the quantity in meters, resulting in a equivalent quantity in kilometers. The process of metric conversion can be made easier with the use of conversion tables or online tools.
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True or false? a patient who has been vomiting off and on for several days should be sent to the emergency room rather than be seen in the medical office.
Answer:
True.
Explanation:
The patient should be treated according to its medical condition. Proper medical facilities and care should be given to the patient in the hospital.
The patient suffering from the on and off vomiting should sent to the emergency room and proper facilities must be given to the patient. The main reason of the vomiting should be provided by the doctors.
Thus, the answer is true.
Which of the following characterizes DNA: A.Non.coding sequences that get deleted in the course of evolution B.Coding sequences that regulate gene expression C.Non-coding sequences that are expressed in different cell types
Answer:
The correct answer will be option-B.
Explanation:
DNA is a molecule which acts as the genetic material of the cell. A living cell passes this genetic material to the daughter cell as it stores the information required by the cell.
The long DNA strand contains both coding and non-coding sequence in its length. Since the coding sequence of a DNA is known as "gene" which codes for a trait of an organism as well as it controls the expression of other genes to express a particular trait.
Thus, Option-B is the correct answer.