The type of microscope that requires a nonmetal sample to be prepared for viewing by coating it with a thin layer of a conductive material is the Scanning Electron Microscope (SEM).
What is Scanning Electron Microscope?A scanning electron microscope (SEM) is a type of microscope that uses electrons to image the surface of a sample. It provides high-resolution, three-dimensional images of the sample's surface topography and composition.
In an SEM, a focused beam of electrons is scanned across the sample surface. When the electrons interact with the atoms on the sample, various signals are generated. These signals, including secondary electrons, backscattered electrons, and characteristic X-rays, are detected and used to create an image.
The electron beam in an SEM is typically generated by an electron gun and focused using electromagnetic lenses. The scanning coils direct the beam in a raster pattern across the sample. By adjusting the beam intensity and scanning parameters, detailed images with high magnification can be obtained.
SEM is widely used in various scientific fields, such as materials science, biology, geology, and nanotechnology. It allows for the visualization and analysis of the surface features, morphology, and elemental composition of a wide range of samples, providing valuable insights into their microstructure and properties.
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what do all living things not need ( a place to live,
parents, water, energy
why can you fit more drops of water than alcohol on a penny
This is because the configuration in the molecules of ethyl alcohol results in a different kind of hydrogen bonding. This is weaker than that in the case of water molecules. This reduces the surface tension of the ethyl alcohol.
What is surface tension?Surface tension is defined as the phenomenon that happens when the surface of a liquid is in contact with another phase. The other phase can be in the form of a liquid as well.
Liquids are able to acquire the least surface area that is possible by them. It can be said that the surface of the liquid behaves like an elastic sheet.
The surface does not only depend on the forces of attraction that are present between the particles within the given liquid, but they are also on the forces of attraction between solids, liquids, or gases that are in contact with the given liquid.
The energy that is responsible for the phenomenon of surface tension can be thought of as approximately equivalent to the work or energy that is required for moving the surface layer of molecules in a unit area.
Therefore, due to less surface tension of ethyl alcohol, more of it can be placed on the liquid.
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The main difference between deserts and steppes is the _____.
vegetation density
annual rainfall
animal population
grass fire frequency
According to the given question, Annual rainfall is the main difference between deserts and steppes
Further Explanation:
Steppes are typical grasslands found almost on all places across the earth. And it has more rainfall than a deserts. Typically, grasslands are dominated by grasses, and growth of the grasses are aided by seasonal rainfall, which are really beneficial to humans and other living things. In terms of economical reasons, grasslands improve the standard of living of humans, and different plants and crops are planted on it, and the annual rainfall on grassland regions further boost the plant growth process and are ready for consumption at a specific period of time. Steppes can be found in Eastern Europe, Asia, North and South America. Steppes are grouped into two forms.
Temperate Steppe Subtropical SteppeDeserts are barren lands or desolate terrains or abandoned places where little or no grass are seen on. Deserts have few rainfall compared to steppes. Due to the limited amount of rain on deserts, plants in the desert typically find it hard to survive. In some cases, Few plants like Cacti, shrubs, succulents and grasses still manage to grow despite the harsh conditions in the deserts, and this is mainly as a result of water storage in the leaves, stems, and also coverings on the leaves with prevent water loss. Deserts are located in Africa, Asia, North and South America, and Europe.
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SteppesDesertsRainfallGrasslandsPlantsWhen people run quickly, they can sweat profusely. Their muscles undergo movement, and the loss of energy takes place. Based on this description, in which two ways is energy conserved when people run?
The two ways by which a person can save the energy of the body is by increasing the muscular endurance and cardiovascular endurance.
Cardiovascular endurance can be defined as the ability to perform exercise at moderate level for an extended period of time. This helps to maintain the heart rate during running or exercise.
Muscular endurance can be defined as the efficiency of a muscle to sustain repeated contractions of muscles against a resistance for a longer period of time. It provides power and strength to the muscles.
Energy is conserved when running mainly through sweat, which cools the body as it evaporates, taking heat with it. Wiping sweat away prevents this cooling process. This regulation of body temperature is important for maintaining a balanced metabolic rate.
When running, energy conservation in the body occurs in a couple of ways related to heat and sweat. As runners exercise and their muscles work, they produce heat due to an increased metabolic rate. This is a result of metabolism speeding up to supply energy for muscle contraction, leading to the production of more heat than when at rest. To cool down and maintain body temperature, our body sweats. As sweat evaporates from the skin, it takes a substantial amount of thermal energy away from the body. This cooling effect is due to the energy transition from the liquid state of sweat to the gaseous state as it evaporates, which is called latent heat of vaporization.
Wiping sweat with a towel does not provide the same cooling effect because it removes the sweat before it can evaporate and take the heat with it. In essence, the evaporation of sweat is a key way the body conserves energy by regulating temperature without losing heat through more energy-intensive processes such as panting or altering blood flow. The balance between energy intake and expenditure is essential for maintaining a healthy metabolic rate and body thermoregulation
Describe generally what happened to each spot of each type of ink. which had the most pigments?
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Exponential growth of organisms would eventually lead to _____.
ecosystem dominance
destroyed vegetation
more predators
overpopulation
Exponential growth of organisms in an ecosystem leads to overpopulation, causing scarcity of resources, ecological damage, and socio-political issues due to resource distribution.
The exponential growth of organisms would eventually lead to overpopulation. When an ecosystem experiences exponential growth, resources become increasingly scarce due to the higher demand from a growing population. This overconsumption can lead to a variety of ecological issues, including competing with or devouring native biota, damage to vegetation, and an augmentation in waste generation. Overpopulation exacerbates all other threats to biodiversity and can result in the destruction of populations, species, and communities. In extreme cases, it can even provoke socio-political instability due to the unequal distribution of dwindling resources.
Describe the part played by the inner membrane of a mitochondrion in producing ATP
The role played by the inner mitochondrial membrane in producing ATP is as follows:
• The inner mitochondrial membrane comprises electron transport proteins. At the inner mitochondrial membrane, a high-energy electron is passed via an electron transport chain.
• This released energy pumps hydrogen out of the matrix space, resulting in the formation of a gradient.
• This gradient pushes hydrogen ions back through the membrane, with the help of ATP synthase.
• With this, the enzymatic activity of ATP synthase generates ATP from ADP.
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Around age 40, adults ___________. see a decline in sexual functioning may need to wear bifocal lenses experience a sharpening of the senses experience a noticeable decline in hearing do not experience any physical changes
1. a sequence of sugars, phosphates, and nitrogenous organic bases
2. a complex molecule containing the genetic code
3. a nucleic acid that participates in the synthesis of proteins
DNA
RNA
nucleic acid
Answer:
it is 1: nucleic acids
2: DNA
3:RNA
Explanation:
It was in my lesson too so i hope this helps
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Strength training is beneficial because it decreases your risk of injury. Which statement BEST describes why this is true?
A.
Muscular fitness training can prevent or improve diabetes and sarcopenia.
B.
Muscular fitness training increases muscle mass, which increases your metabolism.
C.
Muscular fitness training strengthens tendons, ligaments, and cartilage.
D.
Muscular fitness training improves self-image and athletic performance.
Answer:
The correct answer will be option C.
Explanation:
Physical exercise and training strengthens muscles which help in reducing the injuries and pain as:
Regular exercise lubricates the joints which reduce joint pain and stiffness. Increases muscle strength and flexibility thereby reducing the effect of arthritis. Improve balance and give stability to the body. Improve the performance of muscles by increasing the blood supply to muscles.Thus, option C is the correct answer.
The anterior (ventral) rootlets carry ___________ impulses to the spinal nerves.
Most populations changed from mostly light colored to mostly dark colored in the 1800s. This relates to _____
Which part of her brain is responsible for the motor skills involved in playing a violin?
Answer:
There are 4 parts of the brain we can attribute the responsibility of motor skills, like playing the violin. The first is the prefrontal cortex because it helps for the representation of the goal and its pursuit. Second, the motor cortex that handles the voluntary control of actions by someone. Third, the basal ganglia that is responsible when we do repetitive actions without thinking about them and last, but not least, the cerebullum, which is responsible for coordination in people.
Explanation:
Critique the statement, “The color of an object depends on the wavelengths of light it absorbs.” Why is the statement inaccurate? How could you change the statement so it is correct?
On the basis of the results of your tlc analysis, list the analgesic standard compounds in order of decreasing polarity.
Aspirin, Naproxen, Ibuprofen, Acetaminophen (most polar to least polar).
Most Polar:
Aspirin: Has both a carboxylic acid (-COOH) and a phenolic hydroxyl group (-OH) which can readily form hydrogen bonds with water molecules, making it very water-soluble and thus polar.
Naproxen: Contains a carboxylic acid group and an aromatic heterocyclic ring with nitrogen, again enabling significant hydrogen bonding and a relatively high polarity.
Less Polar:
Ibuprofen: While possessing a carboxylic acid group, it lacks the strong hydrogen bonding potential of a phenolic hydroxyl like aspirin. Its bulky hydrocarbon chain also reduces its overall polarity compared to both aspirin and naproxen.
Acetaminophen: Has only a single hydroxyl group and an amide (-NHCOCH3) group, both of which offer limited hydrogen bonding ability compared to the other compounds. Additionally, the electron-withdrawing effect of the aromatic ring reduces the polarity of the hydroxyl group further, making acetaminophen the least polar among the four.
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Are the metabolic rates of the three mammals comparable when based on square meters of body surface area
Final answer:
The metabolic rates of mammals are not directly comparable based on square meters of body surface area. Smaller mammals have higher metabolic rates per body weight because of their greater surface area-to-volume ratio.
Explanation:
The metabolic rates of mammals are not directly comparable when based on square meters of body surface area. Smaller mammals, such as mice, have higher metabolic rates per body weight compared to larger mammals, such as elephants. This is because smaller animals have a greater surface area-to-volume ratio, leading to more heat loss and therefore requiring more energy to maintain a constant body temperature.
Post parturient ketosis usually appears
A. during lactation.
B. when an embryo first becomes a fetus.
C. during fertilization of an ova.
D. during the first trimester of pregnancy.
The organs of the abdominal cavity are called
A. pleural.
B. dorsal.
C. viscera.
D. fascia.
At which location would sunlight have to pass through the thickest amount of atmosphere before reaching Earth's surface?
A. at the poles
B. at the equator
C. at the subtropical latitudes
D. at latitudes between 50 and 80 degrees
Answer: Option (A)
Explanation: The poles are located at the two extreme ends of both the hemisphere, namely the north pole and the south pole.
The sunlight is not directly incident on the poles as the poles are at far distance and the sunlight has to penetrate through the thick atmospheric cloud, which obstructs its light to pass through. So it does not reach the poles and even if the sunlight reaches the poles after passing through the entire atmosphere, it does not have any effect on them.
Whereas at the equatorial region, tropical and sub-tropical region, the sunlight does not face much obstruction and easily reaches the earth's surface.
Thus, the correct answer is option (A).
Carter wants to lower his blood cholesterol level. based on this information, he should limit the intake of
what category do the individual organisms we can see with our naked eye fall in to?
The Eukarya domain.
The organisms can be divided into three domains, based on the type of cell that the organism is made of:
Bacteria domain: cells do not contain a nucleus.Germ theory that states that microorganisms, which are too small to be seen without the aid of a microscope, can invade the body and cause certain diseases. In the late 1800's this theory lead to a simple practice that saved thousands of lives in hospitals throughout the country from post-operative infections. This practice was
D) covering wounds with sterilized dressings.
Which of these would best describe the outcome of increasing the kinetic energy of the molecules in the above picture
The question is incomplete, the complete question is:
Which of these would best describe the outcome of increasing the kinetic energy of the molecules in the above picture? A) The temperature will increase. B) The temperature will decrease. C) The temperature will remain unchanged. D) The temperature would fluctuate up and down.
Answer:
The temperature will increase
Explanation:
Temperature is defined as the average kinetic energy of the molecules of a body. Increasing the kinetic energy of the molecules will also increase the temperature of the molecules.
Similarly, kinetic energy is proportional to temperature. Hence an increase in the kinetic energy of molecules also leads to increase in the temperature of the system.
A 49 year-old presents with an abscess of the right thumb. the physician incises the abscess and purulent sanguineous fluid is drained. the wound is packed with iodoform packing. what cpt® code is reported
which best statement best describes what a thylakoid does during photosynthesis
Answer:
Explanation:
Thylakoid enables the light-dependent reactions to occur
thylakoid is a sheet-like membrane that triggered the reactions in chloroplasts and cyanobacteria
This is the process that releases energy by breaking down food molecules in the presence of oxygen.
Nitrogenous base+sugar+phosphate group=
You respond to a patient whose chief complaint intestinal pain that is described as cramping. when taking the sample history you determine that she finished her dinner a short time ago. the patient also reports a history of atherosclerosis. you suspect that this patient has a life-threatening condition known as
The movement of carbon dioxide out of cells and oxygen into cells can best be explained by which process
Answer: The movement of carbon dioxide out of cells and oxygen into cells can best be explained by which process of DIFFUSION.
Explanation: Diffusion is a process by which movement of molecules, body fluids, exchange of gases takes place from the region of higher concentration to the region of lower concentration.
In the body exchange of CO2 and O2 is done in lungs by process of diffusion.
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Which organism is an example from a pioneer community?
white spruce
grass
heath mat
lichen
Wrong it is not . White spruce!! THE CORRECT. Answer is: lichen.
Answer:
lichen is the correct answer.
Explanation:
lichen is an example from a pioneer community.pioneer species are plants that develop fast and are low to the soil to maximize sunlight absorption. pioneer species are tough and strong, the same as human pioneerslichen is the example of pioneer species and first to colonize a field. lichen can resist a severe environment after the natural disaster.Lichen is called as pioneer species because they are the first to found in a area.