What is the change in internal energy in joules for a system that releases 154j of heat and does 125j of work on its surroundings?.
Answers
The internal energy in joules for a system that releases 154j of heat and does 125j of work on its surroundings answer is -279J.
How the system's internal energy changes?
The first law of thermodynamics explains how the system's internal energy changes:
△U = Q-W
Where,
Q is the heat added to the system
W is the work done by the system The heat is expelled by the system (not absorbed) in this case, so Q = -154J, and the work is done by the system (not absorbed), so W = +152J, with a positive sign. As a result, the system's internal energy fluctuation is
U = Q-W = (-154J) - (+125J) = -279J.
As a result, the system's internal energy has decreased.
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Related Questions
chargaffs team performed experiments to compare the relative amounts of nitrogenous bases in DNA samples. Which technique did they use to compare the amounts?
A. Ultraviolet Spectroscopy
B. Radioactive Labeling
C. Genome sequencing
D. X-ray diffraction
tysm
Answers
Chargaff's team used Option A . Ultraviolet Spectroscopy to compare the relative amounts of nitrogenous bases in DNA samples.
This technique allowed them to accurately measure the concentrations of adenine (A), thymine (T), guanine (G), and cytosine (C) in various DNA samples.
Ultraviolet Spectroscopy works by measuring the absorption of ultraviolet light by a sample. As the nitrogenous bases in DNA have distinct absorption properties, this method provided reliable data on their relative amounts. Chargaff's experiments led to the discovery of Chargaff's rules, which state that in a given DNA sample, the amount of adenine equals the amount of thymine (A=T), and the amount of guanine equals the amount of cytosine (G≈C).
This finding played a crucial role in understanding the structure of DNA and laid the foundation for Watson and Crick's discovery of the DNA double helix. The other techniques mentioned, such as Radioactive Labeling (B), Genome Sequencing (C), and X-ray diffraction (D), were not used by Chargaff's team for this specific purpose, but have their applications in the field of molecular biology. Therefore the correct option A
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Like the atmosphere, the
transports and distributes heat on Earth, helping to regulate climate.
-Ocean
-mountains
-beaches
Answers
Answer:
Ocean
Explanation:
Like the atmosphere, the ocean transports and distributes heat on Earth, helping to regulate climate.
The sea is divided geographically into various areas such that each of the area is known as ocean.
Mountains alter wind flow besides creating a rain shadow effect.
Beaches protect people from the high winds and waves of powerful storms.
how can you figure out the relative age of rocks
Answers
What is the geologic column?
A. a sequence of rock layers with known rock
and fossil formations
B. a column of dense ore that holds together
rock layers
C. an extremely deep hole that reaches the
bottom of Earth's crust
D. an area where fossils from every time period
resurface
Answers
The answer is a
Meiosis is a type of cell division that has 2 rounds of division that creates 4 diploid somatic cells that are genetically identical to the parent cell.
Answers
Answer:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.
Explanation:
there's a better explanation, but I don't know what your question is
As temperatures increase, gases such as CO2 diffuse faster. As a result, plant leaves will lose CO2 at a faster rate than normal. If the amount of light impacting on the leaf and the amount of water available is adequate, predict how this loss of gas will affect photosynthesis in the leaf.
Answers
Answer:
See the answer below
Explanation:
If the amount of light reaching a leaf and the water supply is adequate in the face of inadequate carbon dioxide, the latter becomes a limiting reagent in the process of photosynthesis.
The process of photosynthesis has two steps
1. The light reaction
2. The light-independent reaction/the Calvin cycle
Carbon dioxide is only required in the second step which is the Calvin cycle. This means that the light reaction proceeds at a normal rate but the Calvin cycle is slowed due to inadequate carbon dioxide. Overall, the rate of photosynthesis becomes limited to the amount of carbon dioxide that is available in the leaf.
Ways to reduce carbon dioxide in the air/atmosphere
Answers
Answer:
1) Forests. ...
2) Farms. ...
3) Bio-energy with Carbon Capture and Storage (BECCS) ...
4) Direct Air Capture. ...
5) Carbon Mineralization. ...
6) Ocean-based Concepts. ...
The Future of Carbon Removal.
Explanation:
these are six ways that you can reduce carbon dioxide in the air/atmosphere!
It is possible for a mix up to occur between fictitious and factual information. please select the best answer from the choices provided t f
Answers
It is a true statement that a mix up can occur between fictitious and factual information.
Fictitious versus factual informationA fictitious information is one that is not backed up by evidence. It is one that is simply not true. An information that is a fact is one that can be verified and is actual.
In this case, it is a true statement that a mix up can occur between fictitious and factual information.
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What characteristics are common between
mitochondria and chloroplasts?
I) ATP is produced;
II) DNA is present;
III) Ribosomes are present.
1. I only
2. II only
3. II and III only
4. III only
5. I, II and III
Answers
Answer:
I believe that the answer is Three
Explanation:
Even though both organelles are found in eukaryotic cells, both mitochondria and chloroplast have characteristics often found in prokaryotic cells. These prokaryotic cell characteristics include: an enclosed double membrane, circular DNA, and bacteria-like ribosomes.
Complements of Wikibooks.org
Explanation:
Mitochondria and chloroplasts are similar in size and features to prokaryotes. The deep folds of the inner mitochondrial membrane, called cristae, resemble the folds in the prokaryotic cell, called mesosomes. Both cristae and mesosomes function in aerobic cellular respiration.
A woman was chopping vegetables when she accidentally cut her finger. A few days later, she observed a brownish layer on the wound on her finger. Explain how the wound healed itself over time.
Answers
Answer:
The wound healed by a scab.
Explanation:
Cells fromed over the surface of the skin, and began to repair the wound. Resulting in the reparied wound beung a scab.
Answer:
I'm not a medical person, but I think the wound healed itself overtime is because it had oxygen and it was clean? I really don't know.
Explanation:
What part of the chloroplast uses-thesun energy?
Answers
Answer:
chlorophyll
Explanation:
According to scientific research and evidence, Photosynthesis is part of chloroplasts uses the sun energy.
Explanation:
if you write this in exam I bet you will get full marks if it is about 2 Marks. ((Thank me later and mark me as brainliest if it helped you))#
How do lipids make ATP?
Answers
True or False?
Dominant alleles will always increase in frequency. Explain your answer.
Answers
Answer:
True
Explanation:
dominant alleles essentially overpower or mask the recessive alleles and there are more prevalent over time
Dominant alleles will always increase in frequency - this statement is true.
What is allele?
The term allele denotes the variant of a given gene. In genetics it is normal for genes to show deviations or diversity all alleles together make up the set of genetic information that defines a gene.
The frequency of an allele has nothing to do with whether it’s dominant or recessive. Recessive alleles can be more common that dominant alleles. It all depends on the allele, the evolutionary history of the population, and selective pressures from the environment.
The dominant allele increases in frequency as it masks recessive alleles. Not all individuals have homozygous dominant alleles but even with a heterozygous combination of alleles, the dominant allele will mask the recessive allele.
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what is the function of the liver?
Answers
Answer:
The liver is a complex and multifunctional organ that performs several critical functions in the body, including:
Metabolism: The liver processes and stores various nutrients, including carbohydrates, fats, and proteins, and converts them into forms that the body can use.
Detoxification: The liver helps remove harmful substances from the blood, such as drugs, alcohol, and toxic byproducts of metabolism.
Bile production: The liver produces bile, which is essential for the digestion and absorption of fats and fat-soluble vitamins in the small intestine.
Blood glucose regulation: The liver plays a key role in regulating blood sugar levels by releasing glucose into the bloodstream as needed and storing glucose as glycogen when there is an excess.
Blood clotting: The liver produces several important blood-clotting factors that help prevent excessive bleeding.
Vitamin and mineral storage: The liver stores important vitamins and minerals, such as iron, copper, and vitamin A.
Hormone regulation: The liver plays a role in the production of several hormones, including insulin, glucagon, and estrogen.
Overall, the liver is essential for maintaining overall health and proper bodily function.
Explanation:
odowsa Kee with branches in which each pathway
resents a different outcome:
H
23456
123456
Compare the three methods. What is the same about each
method? What is different? Be prepared to explain why
each method produces all the different outcomes without
repeating any.
ave
Answers
Similarities in both methods:
Both Method H and Method T produce the same set of six outcomes (1, 2, 3, 4, 5, 6).
Each outcome is unique and not repeated within the same method.
Differences:
Method H and Method T are two distinct methods that produce the same outcomes.
The branch method combines the outcomes of Method H and Method T, resulting in twelve different outcomes by considering the interaction of each method with two possibilities (heads and tails).
Explanation:
Method H and Method T are likely different processes or actions that lead to different outcomes.
The letter "H" could represent one approach, and the letter "T" could represent another.
The details of these methods are not provided, so it is unclear why they produce the same set of outcomes.
The branch method seems to be a combination of the two methods, branching out the possibilities for each method (H and T) with additional variations represented by the numbers (1, 2, 3, 4, 5, 6).
Thus, by including both methods and the possible outcomes of each, the branch method expands the total number of outcomes without repeating any.
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To what extent do you agree with the following statement. Justify you answer. ¨Population growth is the primary source of environmental damage.¨- Jacques Cousteau, famous explorer
Answers
The statement suggests that population growth is the primary source of environmental damage. It is important to consider multiple factors and perspectives when discussing environmental damage, as it is a complex issue influenced by various interconnected factors.
There are arguments both for and against the notion that population growth is the primary source of environmental damage:
Arguments in support of the statement:
1. Increased demand for resources: As the population grows, the demand for food, water, energy, and other resources increases. This can lead to overexploitation of natural resources, deforestation, and habitat destruction.
2. Increased waste and pollution: A larger population generates more waste and pollution, which can have detrimental effects on ecosystems, air quality, and water bodies.
3. Land use and urbanization: Population growth often leads to urban expansion and increased infrastructure development, which can result in the conversion of natural habitats into urban areas, contributing to biodiversity loss and ecological disruption.
Arguments against the statement:
1. Consumption patterns: It is argued that the consumption patterns and lifestyle choices of individuals and societies, rather than just population growth, play a significant role in environmental damage. Developed countries with relatively smaller populations often have high levels of resource consumption and carbon emissions.
2. Technological advancements: Technological innovations and advancements can help mitigate environmental damage by improving resource efficiency, reducing pollution, and promoting sustainable practices. Population growth, when accompanied by technological progress, does not necessarily equate to increased environmental harm.
In summary, while population growth can exert pressures on the environment, it is not the sole or primary source of environmental damage. Factors such as consumption patterns, technological advancements, industrial practices, policy frameworks, and individual behavior also contribute significantly to environmental impact. Understanding and addressing these multifaceted factors are crucial for sustainable environmental management and conservation.
What would be the matching strand for this single strand of DNA? Type your answer in all caps. ATTGCCATTA
Answers
The matching strands will be TAACGGTAAT.
In DNA base pairs of one strand in DNA bind with the base pairs of the other strand. A always pairs with T with two hydrogen bonds and G always pairs with C with three hydrogen bonds. So if one strand is ATTGCCATTAthen the complementary strand will be TAACGGTAAT.
Rules of base pairing are pairing will always be A with T the purine adenine (A) always pairs with the pyrimidine thymine (T) ,C with G the pyrimidine cytosine (C) always pairs with the purine guanine (G). In DNA two strands are always held together by hydrogen bonds between pairs of two bases adenine pairs with thymine, and cytosine pairs with guanine.
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If you gram stained human cells, what do you think the results would look like? think about the different steps in the staining procedure and how thry are working
Answers
Gram staining human cells would not produce meaningful results because human cells do not have cell walls, which is the target of Gram staining.
Gram staining is a widely used differential staining technique that allows the identification of bacterial cells based on the structural characteristics of their cell wall. The staining procedure involves several steps, including crystal violet staining, iodine fixation, alcohol decolorization, and counterstaining with safranin. When it comes to human cells, however, Gram staining would not produce meaningful results because human cells do not have cell walls.
Instead, they have a plasma membrane that separates the inside of the cell from its surroundings and a cytoskeleton that provides structural support and helps in cell division, among other functions. Therefore, in the absence of cell walls, the crystal violet-iodine complex would not form and the cells would not retain the stain, rendering the staining procedure ineffective for human cells.
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When tornados strike forests, they can leave behind large gaps called blowdowns. In these gaps, most of the trees have been knocked over.
Fifteen years after a tornado had passed through a forest, scientists compared the characteristics of a blowdown to a similar area that the tornado had not impacted. The scientists measured the canopy cover, which is the percentage of ground area covered by trees. The canopy cover in the blowdown site was 45%, and the canopy cover in the non-impacted site was 80%. The table below shows the population densities of four forest species at the two sites.
Species Description Population Density
(number per 100 square feet)
Blowdown Non-Impacted Site
ash trees native hardwood 2 5
autumn olive non-native shrub 4 1
shagbark hickory native hardwood 1 3
Amur honeysuckle non-native shrub 5 2
Based on the information above, what is one way that a tornado impacts a forest community?
A.
It removes large hardwoods from the community, which decreases the habitat available to smaller plants.
B.
It increases light available on the forest floor, which can encourage the growth of non-native shrubs.
C.
It removes large hardwoods from the community, but these rapidly grow back to restore the forest.
D.
It decreases light available on the forest floor, which can encourage the growth of non-native shrubs.
Answers
Based on the information provided, one way that a tornado impacts a forest community is by increasing the amount of light available on the forest floor, which can encourage the growth of non-native shrubs.
The canopy cover in the blowdown site was only 45%, which is significantly lower than the 80% canopy cover in the non-impacted site. This means that there are fewer trees in the blowdown site, which allows more light to reach the forest floor. This increase in light can create favorable conditions for non-native shrubs, like autumn olive and Amur honeysuckle, to grow and thrive. These shrubs have higher population densities in the blowdown site compared to the non-impacted site. Additionally, the lower canopy cover may also make it more difficult for native hardwoods, like ash trees and shagbark hickory, to compete for resources with the non-native shrubs. Therefore, a tornado can have a significant impact on a forest community by altering the distribution and composition of plant species.
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crystals seen in the synovial fluid from a patient previously diagnosed with gout exhibit positive birefringence when observed under red compensated polarized light. the most probable cause of this discrepancy is:
Answers
Crystals are seen in the synovial fluid from a patient previously diagnosed with gout exhibit positive birefringence when observed under red-compensated polarized light. The most probable cause of this discrepancy is the presence of monosodium urate crystals in the synovial fluid.
How do monosodium urate crystals cause positive birefringence?
Monosodium urate crystals exhibit positive birefringence when observed under red-compensated polarized light because of their crystal lattice structure, which is composed of parallel chains of urate molecules held together by hydrogen bonds.
The plane of polarization of light is split into two perpendicular waves as it passes through the crystal lattice. As a result, one wave passes through the crystal more slowly than the other wave.
The path difference between the two waves is determined by the distance between the two waves as they pass through the crystal, as well as the crystal's refractive index. As a result, the two waves emerge from the crystal at a different angle, resulting in positive birefringence.
The characteristic appearance of urate crystals under polarized light is a bright yellow or orange-red rhomboid or needle-shaped structure. In summary, the positive birefringence exhibited by crystals seen in the synovial fluid from a patient previously diagnosed with gout is due to the presence of monosodium urate crystals in the synovial fluid.
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Are there organisms that can be abiotic and biotic? Explain
Answers
Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms. Abiotic factors include water, sunlight, oxygen, soil and temperature.
match the function of dna on the left with the appropriate description on the right. i. expression a. stable maintenance and passage of information ii. variation b. duplication of genetic material iii. replication c. potential for alteration iv. storage d. production of a phenotype which of the choices below is correct? question 15 options: i
Answers
Expression - production of phenotype
Variation - potential for alteration
Replication - duplication of genetic material
Storage - stable maintenance and passage for information
According to the key dogma of biology, DNA is chosen over RNA for storing information because DNA is less changeable than RNA, expressed in the form of mendelian characters, and also multiplies to generate its own copy. The central dogma also told us that genetic information saved inside DNA is transformed into instruction for manufacturing a specific protein. Mendel named an expression of such a specific protein in the pea plant responsible for certain phenotypic traits. During processes such as cell division, cell development, or even cell repair, replication is the process that is responsible for creating duplicate copies of genetic material. Since RNA is less stable than DNA, it is employed to transform genetic information in order to generate a particular protein.
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All of the following represent examples of unconformities EXCEPT: *
A.horizontal sedimentary strata overlying eroded horizontal sedimentary strata.
B.horizontal sedimentary strata overlying tilted sedimentary strata.
C.tilted sedimentary strata offset by a fault.
D.horizontal sedimentary strata overlying igneous rock.
Answers
Answer:
tilted sedimentary strata offset by a fault.
If 20% of a population is eaten each generation how long will it take for them to go extinct?'
Answers
Answer:
Wild mammals have declined by 85% since the rise of humans. A diverse range of mammals once roamed the planet. This changed quickly and dramatically with the rising number of humans over the course of the last 100,000 years. Over this period, wild terrestrial mammal biomass has declined by an estimated 85%.
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Explanation:
PLS HELP
Explain how a compound microscope allows you to see magnified images.
Answers
Answer:
The classic compound microscope magnifies in two steps : first with an objective lens that produces an enlarged image of the object in a "real" image plane. This real image is then magnified by the ocular lens or eyepiece to produce the virtual image. Two convex lenses can form a microscope.
Explanation:
Answer:
it has multiple magnifying glasses in the scope.
Explanation:
A compound light microscope uses two lenses at the same time to view objects-the objective lens, which gathers light and magnifies the image of the object, and the ocular lens, which one looks through and which further magnifies the image. ... it also allows light to pass to the ocular lens.
list ancestral characteristics common to all animals and choanoflagellates, distinguish animals from choanoflagellates by shared derived characteristic of animals
Answers
The choanoflagellates are a group of free-living unicellular and colonial flagellate eukaryotes considered to be the closest living relatives of the animals.
To list ancestral characteristics common to all animals and choanoflagellates, we can consider the following:
1. Both are eukaryotic organisms, which means they have membrane-bound organelles and a defined nucleus.
2. Both are heterotrophic, relying on other organisms for their food source.
3. They both possess a single flagellum, which is a whip-like structure used for movement.
4. Both have collar cells (choanocytes), which are specialized cells for feeding and filtering particles.
To distinguish animals from choanoflagellates by shared derived characteristic of animals, we can look at these features:
1. Animals are multicellular, while choanoflagellates are primarily single-celled organisms.
2. Animals undergo a specific developmental process called gastrulation, forming distinct germ layers, whereas choanoflagellates do not.
3. Animals exhibit tissue-level organization, which allows for specialization and complex functions, while choanoflagellates lack this organization.
4. In animals, cells are held together by specialized structures like tight junctions, gap junctions, and desmosomes, while choanoflagellates do not possess these structures.
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Pls someone help it's urgent discuss organic agriculture
Answers
Organic agricultural methods are internationally regulated and legally enforced by many nations, based in large part on the standards set by the International Federation of Organic Agriculture Movements (IFOAM), an international umbrella organization for organic farming organizations established in 1972.[12] Organic agriculture can be defined as "an integrated farming system that strives for sustainability, the enhancement of soil fertility and biological diversity while, with rare exceptions, prohibiting synthetic pesticides, antibiotics, synthetic fertilizers, genetically modified organisms, and growth hormones".[13][14][15][16]
Since 1990, the market for organic food and other products has grown rapidly, reaching $63 billion worldwide in 2012.[17]: 25 This demand has driven a similar increase in organically-managed farmland that grew from 2001 to 2011 at a compounding rate of 8.9% per annum.[18]
As of 2020, approximately 75,000,000 hectares (190,000,000 acres) worldwide were farmed organically, representing approximately 1.6% of total world farmland.[19]
Organic farming can be beneficial on biodiversity and environmental protection at local level. However, because organic farming has lower yields compared to conventional farming, additional agricultural land is needed elsewhere in the world, which means that natural land has to be converted into agricultural land. This can cause loss of biodiversity and negative climate effects that outweigh the local environmental gains achieved.[20][unreliable source?]
NEED REAL ANSWER NICE AMOUNT OF POINTS AND BRAINLY
Why is the compound CH2 and CH3 not possible, but CH4 is?
Answers
Answer:
ch3 is a asid compound an has some propertys of the other two but it is an asid
Explanation:
what is the difference between light dependent and light indepenedent reactions
Answers
Answer:
The difference between light dependent and light independent reactions is light independent is energy from sunlight that is absorbed by Chlorophyll. Also light dependent is energy that is converted into stored chemical energy. In the independent reactions, the chemical energy basically harvests during the light dependent reactions, which drives the assembly of these sugar molecules from carbon dioxide.
mark the origin of shafted feathers and wings, which occur in all the groups except tyrannosauroidea
Answers
The origin of shafted feathers and wings is believed to have occurred in the early ancestors of birds, specifically in the group of theropod dinosaurs.
This evolutionary development allowed for the ability to fly or glide, providing advantages such as escape from predators and access to new food sources. However, the tyrannosauroidea group of theropod dinosaurs did not develop shafted feathers or wings, likely because they were larger and did not require flight as a means of survival.
The origin of shafted feathers and wings, which occur in all groups except Tyrannosauroidea, can be traced back to a group of dinosaurs called theropods. The first known theropods with feathers were small dinosaurs like Archaeopteryx and Sinosauropteryx. While feathers initially developed for insulation and display purposes, they eventually led to the evolution of wings and powered flight in birds. In summary, the origin of shafted feathers and wings is linked to theropod dinosaurs, except for the group Tyrannosauroidea, which did not possess these features.
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