Why do you think the size of a white dwarft affects its visual luminosity?
Answers
Answer:
White Dwarfs are extremely difficult to detect as they are quite small compared to a Star. If the area is small the Luminosity is low, which would make it harder to see the white dwarfs due to the low amount of its luminosity.
Explanation:
Related Questions
Use the model below to explain one the following real-world phenomena using a minimum of 3 sentences.
Answers
The model given in the figure shows cell division and it also shows four different stages of cell division Prophase, Metaphase, Anaphase, Telophase.
Cell division is the process whereby a single cell forms two daughter cells.In the anaphase stage, the chromosome is separated into opposite poles by the centrosomes.
Prophase is the first stage of the mitosis during which
The nuclear envelops disintegratesThe chromatin fibers start condensing to form chromosomes.Cell organelles disappear.The spindle assembly also grows and migrate to opposite ends of the dividing cell.Therefore, as depicted in the image, the phase of cell division shown in the attached image is anaphase.
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from a three-point test cross, how do you determine the order of the genes and distance between each gene?
Answers
A three-point test cross involves crossing an individual heterozygous at three loci with a triple homozygous recessive individual. The progeny are then analyzed to determine the gene order and distance between them.
To determine the order of the genes, one must examine the progeny for recombinants. The gene that has the fewest recombinants is in the middle. Once the gene order is established, the distance between each gene can be determined by calculating the percentage of recombinant progeny. The percentage of recombinants can be used to generate a genetic map that shows the distance between each gene.The formula for determining distance is (number of recombinants/total number of progeny) x 100. The result is the distance in map units (centimorgans) between the two genes. The same process can be repeated for the other two genes to establish the order and distance between all three.Learn more about the three-point test cross:
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high concentrations of homocysteine in the blood are associated with the development of a. pellagra. b. neural tube defects. c. cardiovascular disease. d. type 2 diabetes.
Answers
High concentrations of homocysteine in the blood are associated with the development of (c) cardiovascular disease.
Homocysteine is an amino acid that is produced during the metabolism of methionine. Elevated levels of homocysteine in the blood have been found to be associated with an increased risk of cardiovascular disease, including heart attacks, strokes, and peripheral vascular disease. The exact mechanism by which homocysteine contributes to cardiovascular disease is not completely understood, but it is believed to damage the inner lining of blood vessels and promote inflammation. Several studies have shown that lowering homocysteine levels through dietary changes and supplementation with folic acid, vitamin B6, and vitamin B12 can reduce the risk of cardiovascular disease. Therefore, it is important to monitor homocysteine levels in individuals at high risk for cardiovascular disease and take steps to lower elevated levels.
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Nador, R.G. et al. Primary effusion lymphoma: a distinct clinicopathologic entity associated with the Kaposi's sarcoma-associated herpes virus. Blood88, 645-56 (1996). PMID8695812
Answers
The Kaposi's sarcoma-associated herpes virus was identified in a unique and unusual category of AIDS-related lymphomas that generally manifest as lymphomatous effusions with no apparent tumor tissues.
Description of the Statement-
KSHV is consistently present in these body cavity-based lymphomas, and several other characteristics make them stand out. To test this theory, 19 malignant lymphomatous effusions that did not contain a contiguous tumor mass were examined for their symptomatic, cytologic, immunophenotypic, infectious, and molecular features. KSHV was found in 15 of the 19 lymphomas. The c-myc gene rearrangements and Burkitt-like morphology among all 4 KSHV-negative lymphomatous effusions suggested that these were Burkitt-type lymphomas developing in the bodily cavities.Furthermore, these lymphomas developed in men, usually but not always in connection with HIV infection, and homosexual behavior was a risk factor.Learn more about lymphomas here:
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In broad terms, the sunspot cycle tracks the:
A. movement of sunspots.
B. size of the sunspots.
C. overall color of sunspots.
D. changing number of sunspots.
Answers
In broad terms, the sunspot cycle tracks the D. changing number of sunspots.
What is the sunspot cycle?Also known as the sunspot cycle. An 11-yr cycle throughout which the variety of sunspots rises to a most or falls to a minimum. The periodic alternate withinside the variety of sunspots; the cycle is taken because the c programming language among successive minima and is ready 11.1 years.
The sun cycle, additionally called the sun magnetic interest cycle, sunspot cycle, or Schwabe cycle, is an almost periodic 11-yr alternate withinside the Sun's interest measured in phrases of versions withinside the variety of located sunspots at the sun surface.
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4 Starch
Can
be easily broken down to glucose by the enzyme
alayse, which is found
is found in plants. Cellulose is much more difficult
to
break down to glucose suggest how these differences between
Starch and cellulose relate to their
to their function in a
plant.
Answers
Answer
Explanation:
Starch is used as a reserve food supply and is needed to break down quickly in order to be able to use the energy. Whereas, cellulose is tough and fibrous being used to keep the cell walls stable, thus is much harder to break down
Which of these is the best example of heat transfer through radiation?
a
warming up leftover pasta in the microwave
b
putting a metal spoon in a bowl of hot chili
c
holding a hot water bottle in cold hands
d
boiling a kettle of water on a gas stove
Answers
Best example of heat transfer through radiation is: warming up leftover pasta in the microwave.
No medium is required for heat transmission via radiation. When microwaves, infrared radiation, visible light, or any type of electromagnetic radiation is emitted or absorbed, heat transfer by radiation takes place.
Radiation is the method through which heat and light waves hit and enter food in the world of cooking. As a result, the cooking food is not in direct touch with the heat source.
Short, high-frequency waves used in microwave radiation enter food and stir up its water molecules, causing friction and heat transmission. Since microwave heat can permeate food up to several inches thick, food is typically cooked more quickly when using a microwave.
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In photosynthesis what are the 2 major reactions that take place
Answers
Answer:While the mechanisms of photosynthesis are complex, the overall reaction occurs as follows: carbon dioxide + sunlight + water ---> glucose (sugar) + molecular oxygen. Photosynthesis takes place through several steps which occur during two stages: the light phase and the dark phase. Stage One: Light Reactions
Explanation:
eh it called google
Answer: light-dependent reactions and the Calvin cycle
Explanation:
(light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
How many years will it take to triple the population of a city
that is growing exponentially at a relative rate of growth of 7%
annually?
(Accurate to the nearest year.)
How many yean wir it take to triple the poculation of a city that is growing exponentially at a relative rate of growth of \( 7 \% \) annually? (Acrurute fo the nearet pear)
Answers
To determine how long it will take to triple the population using the formula for exponential growth, we can start with the equation P(t) = P0e^(rt), where P0 is the initial population, P(t) is the population after time t, r is the relative rate of growth, and e is the mathematical constant approximately equal to 2.71828.
In this case, we want to find the value of t when P(t) is three times P0, which can be expressed as 3P0. So, we have the equation 3P0 = P0e^(rt).
By taking the natural logarithm (ln) of both sides of the equation, we get ln(3) = ln(e^(rt)).
Using the properties of logarithms, ln(e^(rt)) simplifies to rt ln(e), and ln(3) can be written as ln(3)/ln(e^(rt)).
Given that r = 0.07 (as given in the problem), we can calculate t as follows:
t = ln(3)/(0.07) ≈ 9.90 years ≈ 10 years (approximately).
Therefore, it will take approximately 10 years to triple the population.
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Please answer this as fast
Answers
Answer:
Skeletal muscles
Explanation:
there are 700 skeletal muscles in our body which make half of our body.
A community can include more than one population.
True or false?
Answers
Explanation:
True
Yes it is true. A community can include more than one more population and it has to.
The sequence of nucleotides is called
A. Gene
B.genome
C.gene expression
D. Genetic code
Answers
El Niño is an event where the normally strong winds along the equator are much weaker than usual, causing warm surface water along the equator to pile up. Do these images represent a normal circulation pattern or an El Niño pattern? Explain your response.
Answers
Yes, because In 1997, El Niño had not spread as far across the equator in comparison to 2015. During an El Niño event, warm ocean waters accumulate in the central and eastern tropical Pacific, disrupting the normal atmospheric circulation patterns.
What is the El NiñoEl Niño refers to a climatic occurrence marked by the increase in temperatures of the ocean's surface in the central and east areas of the tropical Pacific Ocean. It has the potential to cause considerable changes in global weather phenomena.
The intensity and scope of El Niño occurrences differ annually. The year 2015 experienced a robust El Niño, which had significant and far-reaching impacts on weather systems around the world.
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One or more extra whole sets of chromosomes is called.
Answers
Answer:
Polyploidy
Explanation:
Hope that helps!
Your colleague has collected some sediments from a mangrove swamp and then grows the bacteria from those sediments on an agar plate to determine the concentration of bacteria in those sediments.
a) Describe why the resulting bacterial concentration is an underestimate of the actual concentration of bacteria in those sediments.
b) State what method they should have used instead to more accurately determine the bacterial concentration.
Answers
From the question;
1) It may have been underestimated sue to visibility bias
2) The method of direct microscopic count or direct cell count can be employed.
What about the bacteria?On the particular agar medium employed, not all bacteria contained in the sediments may be viable or able to grow. Some bacteria might no longer be culturable or in a dormant state, which limits their capacity to grow into colonies on the agar plate. This viability bias may lead to the underestimate of the bacterial population by excluding a sizable fraction of it.
A direct microscopic count entails using a microscope to directly observe and count bacterial cells. Without the bias imposed by culture-based approaches, it provides a more thorough count of bacterial cells, including viable and non-viable cells.
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Which of the following is not an example of green infrastructure?
OUrban tree canopy
O Permeable pavement
Rainwater harvesting
Streets and parking lots
Answers
Answer:
Streets and parking lots
Explanation:
The example that is not an example of green infrastructure from the given options is Streets and parking lots.Green infrastructure refers to the network of natural and semi-natural features, green spaces, and ecological systems in cities and towns. It is an approach to managing stormwater runoff that emphasizes infiltration and the use of natural systems to filter pollutants from water.Green infrastructure helps to manage stormwater, improve air quality, and create healthier urban environments. It includes practices such as urban tree canopy, permeable pavement, and rainwater harvesting. Streets and parking lots, on the other hand, are not examples of green infrastructure.
Describe the function and purpose of the Na+/K+ pump in re-establishing the resting membrane potential?
Answers
The function of the Na+/K+ pump in re-establishing the resting membrane potential is that the Na+K+-ATPase pump helps to maintain osmotic equilibrium and membrane potential in cells.
What is the resting membrane potential?The resting membrane potential is the voltage across a given cell membrane during the resting stage.
The purpose of the Na+/K+ pump in re-establishing the resting membrane potential is for the sodium and potassium to move against the concentration gradients.
The Na+ K+-ATPase pump maintains the gradient of a higher concentration of sodium extracellularly and a higher level of potassium intracellularly.
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What type of bonds are found between the 5-Carbon sugar of one nucleotide and the Phosphate group of the next?
A.
Covalent bonds
B.
Ionic bonds
C.
Hydrogen bonds
D.
Peptide bonds
Answers
The Milky Way galaxy was given its name because of what it looks like when viewed from Earth.
True False
Answers
Answer:
false. we cant see the whole galaxy from earth.
Answer:
the answer is false
Explanation:
we can't see the milky way (galaxy) from earth, its impossible since its so far away. unless we used a telescope maybe, not sure but for this question its false. I hope this helped!
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in addition to carbon dioxide, two other major greenhouse gases in earths atmosphere are ?
Answers
What is Speciation? I am confused
Answers
Answer:
D- the formation of two or more species from a common ancestor.
Do you think that governments should institute measures to control the human population? Please don’t send me those file things. Please just give me the answer.
Answers
The temperature is some 30C. The humidity stifling, the noise unbearable. In a yard between two enormous tea-drying sheds, a number of dark-skinned women patiently sit, each accompanied by an unwieldy looking cloth sack. They are clad in colourful saris, but look tired and shabby. This is hardly surprising - they have spent most of the day in nearby plantation fields, picking tea that will net them around two cents a kilo - barely enough to feed their large families.
Vivek Baid thinks he knows how to help them. He runs the Mission for Population Control, a project in eastern India which aims to bring down high birth rates by encouraging local women to get sterilised after their second child.
As the world reaches an estimated seven billion people, people like Vivek say efforts to bring down the world's population must continue if life on Earth is to be sustainable, and if poverty and even mass starvation are to be avoided. There is no doubting their good intentions. Vivek, for instance, has spent his own money on the project, and is passionate about creating a brighter future for India.
But critics allege that campaigners like Vivek - a successful and wealthy male businessman - have tended to live very different lives from those they seek to help, who are mainly poor women.
These critics argue that rich people have imposed population control on the poor for decades. And, they say, such coercive attempts to control the world's population often backfired and were sometimes harmful.
Population scare
Most historians of modern population control trace its roots back to the Reverend Thomas Malthus, an English clergyman born in the 18th Century who believed that humans would always reproduce faster than Earth's capacity to feed them.
Giving succour to the resulting desperate masses would only imperil everyone else, he said. So the brutal reality was that it was better to let them starve.
Rapid agricultural advances in the 19th Century proved his main premise wrong, because food production generally more than kept pace with the growing population.
But the idea that the rich are threatened by the desperately poor has cast a long shadow into the 20th Century.
From the 1960s, the World Bank, the UN and a host of independent American philanthropic foundations, such as the Ford and Rockefeller foundations, began to focus on what they saw as the problem of burgeoning Third World numbers.
The believed that overpopulation was the primary cause of environmental degradation, economic underdevelopment and political instability.
Massive populations in the Third World were seen as presenting a threat to Western capitalism and access to resources, says Professor Betsy Hartmann of Hampshire College, Massachusetts, in the US.
Which statement is true of chloroplasts?
They transport glucose into the cell.
They convert light energy into chemical energy.
They convert the energy in glucose into a more usable form.
They are present in animal cells, but not in plant cells
Answers
Answer:
3 answer is actually true i guess.
Which statement best represents a hypothesis that could be supported or not supported by evidence? A. Students should get more sleep if they want to do well on tests. B. If students get more sleep, they will perform better on tests. 0 C. How does sleep affect a student's performance on tests? D. Students who get more than eight hours of sleep will feel better on the day of a test.
Answers
B. If students get more sleep, they will perform better on tests. 0 is the best statement represents a hypothesis that could be supported or not supported by evidence
The statement that best represents a hypothesis that could be supported or not supported by evidence is option B: "If students get more sleep, they will perform better on tests." This statement presents a clear cause-and-effect relationship between sleep and test performance, allowing for the possibility of gathering evidence to either support or refute the hypothesis.
A hypothesis is a proposed explanation or prediction that can be tested through observation and experimentation. In this case, the hypothesis suggests that increasing sleep duration will lead to improved test performance in students. By conducting research and collecting data on the sleep habits and test scores of students, it is possible to gather evidence that supports or contradicts the hypothesis.
The other options (A, C, and D) do not present hypotheses that can be as easily tested or measured. Option A states a general recommendation without a specific cause-and-effect relationship. Option C poses a broad question without making a specific prediction. Option D suggests a correlation between sleep duration and feeling better on the day of a test, but it does not directly address test performance. Therefore, option B is the most suitable hypothesis for investigating the relationship between sleep and test performance. Therefore, Option B is correct.
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Which of the following most accurately describes the pattern of immune system functioning during each stage of the general adaptation syndrome? Click or tap a choice to answer the question.
A) Immune system functioning increases slightly during the first stage, decreases during the second, and then increases again during the third stage. B)In all stages, immune system functioning decreases.
C) Immune system functioning decreases slightly during the first stage, increases during the second, and then decreases more significantly during the third stage.
Answers
The correct answer is C. The general adaptation syndrome refers to the body's response to stress, and consists of three stages: alarm, resistance, and exhaustion.
During the alarm stage, the body's immune system initially responds by increasing its functioning slightly. However, during the resistance stage, the immune system can become compromised as the body continues to adapt to the stressor. This can result in a slight decrease in immune system functioning during the resistance stage. Finally, during the exhaustion stage, the body's resources are depleted and immune system functioning can decrease more significantly. Therefore, the pattern of immune system functioning during each stage of the general adaptation syndrome is a slight increase during the alarm stage, a slight decrease during the resistance stage, and a more significant decrease during the exhaustion stage.
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The human brain can only remember approximately 22 pieces of information at once. Completing checklists gives people a sense of accomplishment. Checklists prompt providers to remember and appreciate the importance of tasks. None of the above; checklists should not typically be used because they insult the intelligence of providers and staff.
Answers
None of the above. Checklists should not typically be used because they can create a false sense of security and may lead to complacency in providers and staff. Additionally, relying on checklists can lead to an overemphasis on completing tasks, rather than using critical thinking and problem-solving skills. It is important to remember that checklists are a tool to help ensure that tasks are completed, but they should not replace the need for providers and staff to think critically and use their own judgement.
Which is a type of media that would most likelu influence a person tobuse tobacco
Answers
Hope it works. Good luck :)
Which of these best describes the relationship between smoke from factories and acid rain?
Answers
Answer:
C
Explanation:
A Smoke travels directly into clouds, creating acid rain.
B Smoke turns clouds black, which causes them to become more acidic and release black acid rain.
с Smoke increases greenhouse gases, which make the water in clouds more acidic so they release acid rain.
D Smoke wipes out all the greenhouse gases in the atmosphere, increasing the acidity of clouds so they create acid rain.
The correct answer would be that smoke increases greenhouse gases, which make the water in clouds more acidic so they release acid rain.
A typical smoke consists of a mixture of gases, including greenhouse gases like methane, water vapor, and some oxides of acids. Hence, smoke has the capacity to cause acid rain because it increases the concentration of greenhouse gases in the atmosphere. These gases dissolve in rainwater, causing it to form a weak solution of acid.
The correct option is C.
State four ways in which the mammalian skin responds to low temperature in the environment
Answers
When you're out in cold climate, your skin starts shivering so the blood vessels will acquire and keep you as warm as possible.
But if there's a heat wave, you'll sweat to increase the blood flow to the veins, which in turn increases perspiring. This process chills you off as the water disappears from your skin.
How does the skin respond to low temperature?If the skin temperature drops below 37°C, a variety of rejoinders are started in the skin to have the warmth within the body and to increase heat display . These include vasoconstriction, end of sweating, and erection of follicles to increase insulation.
Thus, this could be the answer.
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A farmer ,sangay , plants chilli in the first year .He than plants beans in the same field next year ..
A. why does he do so ..
Answers
Answer/Explanation:
Chilli and Beans are two different groups of crops having different nutrient requirement for them to grow well.
Beans is a leguminous crop that can help fix nitrogen back to the soil after the soil nitrogen content has been depleted by crops that use up nitrogen in the soil.
So, one of the possible reasons why Sangay plants Chilli the first, and beans the next year could be to ensure optimal productivity, as beans would replenish the soil with nitrogen. Also, both crops have different nutrient requirement. Nutrient requirement for both crops vary.