The reasons why cells need to be stained prior to microscopy are:
No cellular components are visible without staining Highlight different cellular structures Differentiate between living and dead cellsStaining is a technique used in microscopy to make cells and other biological tissues visible under a microscope. Without staining, many cellular components are not visible because they are too small or transparent to be seen without some form of contrast. By applying a stain, such as haemotoxylin and eosin, to the tissue, it is possible to highlight specific structures or components within the cells, making them more visible under the microscope.
Staining can also be used to differentiate between different types of cells or tissues, or to highlight specific structures or processes within the cells. For example, different stains may be used to highlight different organelles or to visualize metabolic processes.
kill cells, is not a reason why cells need to be stained prior to microscopy.
highlight metabolic processes, is not an accurate description of staining.
make all organelles homogeneous, is not a reason why cells need to be stained prior to microscopy.
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What layer of the heart would be most immediately susceptible to infections caused by bacteria circulating in the blood
The endocardium covers the heart valves and it is these valves that are primarily affected by infective endocarditis. If an infection is left untreated, bacteria can grow and eventually destroy the valve, leading to heart failure.
Three layers of tissue make up the wall of the heart. The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.
The endocardium is the innermost layer of the heart, lining the ventricles and covering protruding structures such as the heart valves, chordae tendineae, and papillary muscles. Endocardial cells are developmentally and biologically similar to the endothelial cells that line blood vessels. The endocardium protects the valves and heart chambers as well.
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why are food deserts dangerous to a community
Question: Why are tood deserts dangerous to a community.
Explanation:
In food deserts, healthy foods like fruits, vegetables, whole grains, dairy, peas, beans,meat ,and fish are often expensive or unobtainable
The lack of access to healthily foods in these communities translates to health disparities and high rates of chronic disease
Answer:
this is only what I know
Explanation:
Without access to healthy foods and people living in food deserts may be a higher risk of diet-related conditions as such as obesity, diabetes and even worse is that cardiovascular disease
Which of the following would you expect to have the least effect on hematocrit percentage?
A) prolonged or excessive fever
B) living at higher altitude
C) dehydration
D) injection with erythropoietin (EPO)
what is a three dimensional structure that respresents the alternating pattern of particles in a crystal
A crystal lattice is a three-dimensional arrangement of particles that form a repeating pattern. It is the fundamental building block of all crystalline materials, including metals, minerals, and polymers.
The particles in a crystal lattice are arranged in an alternating pattern, with each particle connected to its nearest neighbors. This arrangement of particles creates a highly ordered structure, which gives crystals their unique properties, such as hardness, strength, and electrical conductivity. The repeating pattern of a lattice is what gives it its distinctive structure and allows it to be easily manipulated.
Depending on the size and shape of the particles, the lattice can take on many forms, from cubic to hexagonal. The arrangement of particles in a crystal lattice can also determine its physical and chemical properties. The structure of a crystal lattice is an important factor that must be considered when designing materials for specific applications.
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What happens to the light when you look at a green object?
When you look at a green object, the object reflects green light and absorbs other colors of the visible spectrum. The green light is then transmitted to your eye, where it is focused by the lens onto the retina.
The retina contains specialized cells called rods and cones that are sensitive to different wavelengths of light. The cones in the retina are responsible for color vision and are most sensitive to different colors in the visible spectrum, and when the green light reaches the cones, it triggers a neural signal that is sent to the brain, where it is interpreted as the color green. The absorbed light colors are not reflected and are green absorbed by the object, they are not transmitted to green the eye, so they are not perceived by the observer.
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Each gram of fat you consume provides over twice as many calories as a gram of protein or carbs. What does this tell you about the body's ability to burn off these fuels? which would require the most energy to burn?
Since each gram of fat provides over twice as many calories as a gram of protein or carbs, this indicates that the body needs almost double the energy in order to burn each gram of fat and therefore the body needs to workout extra to achieve that.
Fats are the fatty acids that are present stored inside the body of an organism. The fats take more time to burn off and yields around 9 calories when each gram of fat is burned off.
Calories are the energy content present in the food. The higher the calories the higher energy it provides to the body. This energy gets stored in the body in forms of fats.
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How would this model be altered in non-industrialized countries?
A No change due to a drop in both plant photosynthesis and respiration.
B Balanced due to the reduced combustion of fossil fuels.
C There would be little change in any sinks or resources; no change to model.
D Unbalanced due to the increase in plant sinks.
B Balanced due to the reduced combustion of fossil fuels would this model be altered in non-industrialized countries.
What issues do the newest industrialised nations face?Emerging industrialised nations have a challenge. They must invest a sizable sum of money if they wish to keep up their industrialisation trend. Cities need to grow, transportation needs to be as effective as it can be, and new roads need to be built.
Based on nutrition, health, education, and literacy metrics, there is a lack of human resources. Economic vulnerability, as evidenced, for instance, by fluctuations in agricultural production, exports of commodities and services, and the proportion of the population that is displaced by natural disasters.
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The ____________ (pipe/vent) is a long tube in the ground that connects the magma chamber to Earth’s surface.
The pipe is a long tube in the ground that connects the magma chamber to the Earth's surface. Magma leaves the volcano through the vent and becomes lava.
What is Magma chamber?A magma chamber is a large pool of liquid rock which is present beneath the surface of the Earth. The molten rock, or magma, in such a chamber is comparatively less dense than that of the surrounding country rocks, which produces buoyant forces on the magma that tend to drive it upwards.
The magma moves up through a pipe, a long tube in the ground which connects the magma chamber to the Earth's surface. The pipe is the tube which connects the magma chamber to the vent. Molten rocks and gases leave the volcano through an opening called as the vent.
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The process of comparing currently experienced visual input with past visual
memories takes place in
9
a) the corpus callosum.
b) the thalamus.
c) the cerebellum.
d) association areas.
The process of comparing currently experienced visual input with past visual memories takes place in association areas.
The part of the cerebral cortex that processes visual information is called the visual cortex. The occipital lobe is where it is situated. The visual cortex receives sensory information coming from the eyes after passing through the lateral geniculate nucleus of the thalamus. The primary visual cortex, also known as visual area 1 (V1), Brodmann area 17, or the striate cortex, is the region of the visual cortex that receives sensory information from the lateral geniculate nucleus. The visual areas 2, 3, 4, and 5 (also known as V2, V3, V4, and V5 or Brodmann area 18 and all of Brodmann area 19) make up the extrastriate regions.
A visual cortex exists in the left hemisphere of the brain as well as the right.
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Portland cement is the most common type of cement used in the world. It is made of limestone and other material. It was first developed in 1756 by John Smeaton Portland. Cement is made through a process of heating and grinding. It sets in hardens is with mix with water.. what is the correct statement about Portland cement?
The statement that is correct is that; Portland is not a mineral because minerals are not man-made. Option C
What is the Portland cement?We can see that the Portland cement is the product of a kind of a chemicals reaction. In this reaction, there is the combination of the water and the limestone and the mixing is what does produce the Portland cement.
We know that Portland cement is the most common type of cement used in the world. It is made of limestone and other material. It was first developed in 1756 by John Smeaton Portland.
The development of the Portland cement was a mile stone in the rea of the building and the construction industry as we know it today in the whole world. The production of the cement makes it to be hard and then able to survive harsh conditions in usage.
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Missing parts;
Use the definition of minerals to choose the correct statement about Portland cement.
Portland cement is the most common type of cement used in the world. It is made of limestone and other material. It was first developed in 1756 by John Smeaton. Portland cement is made through a process of heating and grinding. It sets and hardens when mixed with water.
A
Portland cement is a mineral because all minerals are made of limestone.
B
Portland cement is a mineral because all minerals harden when mixed with water.
C
Portland is not a mineral because minerals are not man-made.
D
Portland cement is not a mineral because minerals aren’t used in daily life.
What causes increase in rate of cell growth and size?
Cells can grow by increasing the overall rate of cellular biogenesis such that biomolecule production exceeds the overall rate of cellular degradation of biomolecules by proteasomes, lysosomes, or autophagy.
In a typical mammalian dividing cell, proliferation occurs in her G1 phase of the cell cycle and is closely coupled with the S phase (DNA synthesis) and M phase (mitosis). The combined effects of growth factors, hormones, and nutrient availability provide external signals for cell growth.
Cell growth, proliferation and differentiation are primarily controlled by selective transcriptional regulation of gene expression in response to extracellular stimuli. Much of this transcriptional regulation is regulated by the action of sequence-specific transcription factors.
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What is a summary of the nitrogen cycle?
Association of glucocorticoids with their dna binding sites is essential for the regulation of inflammatory response genes. which one or more of the following might disrupt normal association of glucocorticoids with their dna binding sites and be cause for concern?
a. excess serum glucocorticoid levels b. taking prednisone for an asthma attack c. genetic mutation in the GRE d. zinc deficiency in a patient
c. Genetic mutation in the GRE, d. zinc deficiency in a patient might disrupt normal association of glucocorticoids with their DNA binding sites and be cause for concern
Genetic mutations in the GRE (glucocorticoid receptor elements) are an important factor in determining the effectiveness of glucocorticoid hormone therapy.
If a patient is deficient in zinc, this can interfere with the normal binding of glucocorticoids to their DNA binding sites, which can be a cause for concern.
In order to ensure that the treatment is effective, patients must have adequate zinc levels in order for the glucocorticoids to be properly bound to their respective DNA binding sites. By doing so, the effectiveness of the treatment is increased and the risk of side effects is minimized.
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What are some of the strategies which can be used on an individual with chronic disease to enable change of behaviour overtime?
When it comes to helping individuals with chronic diseases to change their behaviors and habits, some of the most effective strategies include:
Education: Educating the individual about the condition, the risks of not changing their behaviors, and the potential benefits of changing them.Goal Setting: Helping the individual to set realistic, achievable goals for behavior change, and then providing support and encouragement throughout the process.Self-Monitoring: Encouraging the individual to track their progress in making changes to their behaviors, either through physical notebooks or via apps.Motivation: Offering incentives and rewards for positive behavior change, such as giving praise or offering rewards for small successes.Social Support: Helping the individual to build a support network of friends and family who can provide motivation, assistance, and accountability throughout the process.Cognitive Restructuring: Helping the individual to identify and challenge the negative thoughts and beliefs that may be contributing to the negative behaviors, and replacing them with more positive and helpful thoughts.Problem-Solving: Working with the individual to develop strategies for overcoming obstacles that may be standing in the way of making changes.Learn more about strategies:
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Duchenne muscular dystrophy (DMD) is a recessive, sex-linked disorder carried on the X chromosome. If a woman who is a carrier of DMD and a man without the disorder have children, which outcome is possible?
a. All of their sons and half of their daughters could have DMD.
b. Half of their sons and half of their daughters could have DMD.
c.Half of their sons and none of their daughters could have DMD.
d. None of their sons and half of their daughters could have DMD.
Answer:
C. Half of their sons and none of their daughters could have DMD.
Explanation:
DMD is a recessive disorder carried on the X chromosome and it is sex-linked. This means that the gene for DMD is located on the X chromosome and it affects mostly males.
If a woman is a carrier of DMD, it means that she has one copy of the mutated gene and one normal copy, and she does not show any symptoms of the disorder.
If a man without the disorder has children with this carrier woman, half of their sons will inherit the mutated X chromosome from the mother. Therefore, they will have the disorder and half of their sons could have DMD.
Since, Females have two X chromosomes, and therefore, if a daughter inherits the mutated X chromosome from the mother, the second X chromosome will be normal which will help in compensating the effects of the mutant one, hence they will be carrier of the disorder but will not show any symptoms. So none of their daughters could have DMD.
So, the outcome is: C. Half of their sons and none of their daughters could have DMD.
Answer:D
Explanation:
I think it is D because only the mother had it and not the father. I don't think the father could get DMD through sex either. So I think that none of their sons and half the daughters could have DMD because they inherited it from the mother.
Why are plants unable to grow at the bottom of lakes the water is colder at the bottom sunlight does not reach the bottom?
Because the water is so deep. There are no rooted plants to be found at the bottom of lakes because sunlight cannot penetrate that far.
Lakes obtain their water supply from three different sources: precipitation; rivers and streams; and underground water.
The size of lakes can range from very small to very large. They can be quite deep, or they can be only moderately so. Ponds are frequently used as a synonym for lakes that have depths of less than six or seven feet and support plant life on the bottom.
The changing of the seasons can bring about significant fluctuations in temperature for the lakes that are found in certain temperate regions.
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Every deliberate action you make, such as pedaling a bike, walking, scratching, or smelling a flower, involves neurons in the __________ nervous system.\
Every deliberate action you make, such as pedaling a bike, walking, scratching, or smelling a flower, involves neurons in the Somatic nervous system..
So , The correct option is B
The somatic nervous system is one of the peripheral nervous system's divisions. Only the skeletal muscles get motor signals from the central nervous system via the somatic nervous system.
The reactions that are consciously controlled are generated by the skeletal muscles. As a result, the somatic nervous system governs the body's voluntary motions.
Voluntary motions of skeletal muscles, such as walking, sniffing a flower, cycling, and so on, are therefore governed by neurons of somatic division.
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Full Question ;
Every deliberate action you make, such as pedaling a bike, walking, scratching, or smelling a flower, involves neurons in the ________ nervous system.
a) sympathetic
b) somatic
c) parasympathetic
d) autonomic
Which of the following molecule makes the largest contribution to the biomass of a tree? O NADPH O H20 O CO2 O Nutrients/sol
CO2 molecule makes the largest contribution to the biomass of a tree.
In the context of ecology, biomass refers to live species, whereas in the context of bioenergy, biomass refers to materials from recently living (but now dead) organisms. There are differences in how biomass is defined in the latter situation, such as exclusively from plants plants and algae, or plants and animals. Plants provide the great bulk of the biomass utilised in bioenergy. Bioenergy is a form of renewable energy that has the potential to help mitigate climate change.
Because we can always grow more trees and food, and garbage will always exist, biomass is a renewable energy source. Wood, cereals, dung, and some waste are examples of biomass fuels.
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In toxicity testing, the dose of a chemical above which there is a measurable decline in the health of the organism being tested is referred to as
In toxicity testing, the dose of a chemical above which there is a measurable decline in the health of the organism being tested is referred to as the toxicity threshold.
A level of the dose above which the toxic effects of the dose can be observed in an organism is known as the toxicity threshold.
Below the threshold dose, no toxic effects are observed. Toxicity testing, also referred to as safety testing or toxicity analysis, is the study of the extent to which an interested substance adversely affects an organism’s normal functions, based on exposure time, exposure route, and concentration of the substance.
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What are the 5
qualifications for
something to be
experimented on
scientifically?
please help lol
The five components of scientific method are: observations, questions, hypothesis, methods and results. Following scientific method procedure not only ensures that experiment can be repeated by other researchers, but also that the results garnered can be accepted.
1. Define a Question to Investigate
As scientists conduct their research, they make observations and collect the data. The observations and data often lead them to ask why something is the way its
2.Make Predictions
Based on their research and observations, scientists will often come up with hypothesis. A hypothesis is possible answer to a question.
3. Gather Data
Evidence is needed to test prediction. There are several strategies for collecting evidence, or data. Scientists can gather their data by observing the natural world, performing an experiment in laboratory, or by running mode
4. Analyze the Data
Scientists organize their data in tables, graphs, or the diagrams. If possible they include relevant data from other sources
5. Draw Conclusions
Based on whether or not their prediction came true scientists can then decide whether evidence clearly supports or does not support hypothesis
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When an endospore germinates, it gives rise to two daughter cells called vegetative cells.
true/false
When an endospore germinates, it creates two daughter cells that are referred to as vegetative cells. Members of the genera Streptomyces are essential to the environment because of their capacity to break down a range of chemicals.
What does "germination" actually mean?Germination is the action of seeds developing into new plants. First, the environment must support the seeds growing into new things. Usually, factors like the seed's depth, the water's accessibility, and the temperature all affect this.
What really is seed germination in biology?An embryonic axis (usually the radicle) emerges from the seed coat at the end of a series of events that begin with hydration and constitute the process of seed germination.
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I need someone to explain this
Light energy is captured in the process of photosynthesis which stores the energy in organic molecules to be used in the process of respiration.
What is Photosynthesis?This is referred to as the process in which green plants manufacture food in the presence of sunlight which is stored in the molecular bonds of organic molecules such as sugars.
It is used during the process of respiration by cells of the body and it involves the production of energy from the oxidation of complex organic substances as result of the body taking in oxygen and giving off carbon dioxide which is therefore the reason why they were chosen as the correct choices.
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in general how is the number of offspring produced by an animal related to the amount of time and energy it invests in caring for its young
Answer: The amount of time parents spend raising their children decreases with increasing fecundity
Explanation:
Fecundity is the capacity to have children. It may also be used to characterize an organism's rate of reproduction. The level of parental care provided is frequently correlated with the number of offspring produced. Generally speaking, the amount of time parents spend raising their children decreases with increasing fecundity. Animals can only use a finite amount of energy for reproduction.
Which of the following best describes why scientists used the conversion of stored binary patterns to send an image to star cluster M13?
Scientists used the conversion of stored binary patterns to send an image to the star cluster M13 as a way to transmit data over long distances through space using radio waves.
What are binary patterns?
Generally, Radio waves allowed scientists to communicate data over vast distances via space by converting stored binary patterns into a pattern that could be decoded as an image. This was done in order to send a picture to the star cluster M13.
By encoding the information to be sent into a binary format, which can then be communicated as a sequence of radio waves, this technology enables the transfer of enormous quantities of information in a manner that is both efficient and accurate.
It is possible that the picture was selected as the data to be sent in order to demonstrate the capabilities of the technology or to test those capabilities.
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What are the factors that influence sex?
An Individual's sexual behavior is influenced by a complex interplay of biological, psychological, social, cultural, relationship, and environmental factors.
There are many factors that can influence an individual's sexual behavior, including:
Biological and hormonal factors, such as age, gender, and reproductive statusPsychological factors, such as personality, mood, and mental healthSocial and cultural factors, such as family values, religion, and cultural normsRelationship factors, such as attachment, trust, and communicationEnvironmental factors, such as access to contraception, education, and socialization on sex, and laws and policies related to sex.It's worth noting that these factors can interact with one another and can change over time, making it difficult to predict an individual's sexual behavior with certainty.
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What color light does a leaf reflect?
The specific colors of light that a leaf reflects depend on the pigments present in the leaf. Chlorophyll, which is the pigment primarily responsible for the green color of leaves.
leaf reflects green light and absorbs other colors of the visible spectrum such as blue and red. Carotenoids, which are pigments that give leaves their yellow and orange colors, leaf reflects yellow and orange light. And finally, anthocyanins which are pigments that give leaves their red, purple and blue colors, leaf reflects red, purple and blue light. Additionally to these pigments, other substances on the leaf surface can also affect the light leaf reflects. It's worth noting that while leaves reflect visible light, they also reflect other types of light such as near-infrared and ultraviolet, but these are not visible to the human eye.
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How does the immune system use carbohydrates.
What conclusions can be drawn cross I and cross II? explain how the data support your conclusions for each other
Cross I and Cross II obey the law of dominance and the law of segregation, respectively, according to the mendelian pattern of inheritance.
The F1 has only shown a single dominant trait when mating with two pure breeding Geno types. By selfing two F1 parents, it was also discovered that the mono hybrid F2 ratio of 3:1 is followed by the progeny population.
The phenotype ratio of the dihybrid test cross is 1:1:1:1 or
The dihybrid test cross ratio's observed and predicted results do not significantly differ from one another.
Number of phenotypes Equals degrees of freedom -1= 4-1= 3
Critical Chi square value with 3 degrees of freedom and 5% level of the table significance is 7.82.
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Note: The missing table in the diagram is given bellow,
What conclusion is on Mendelian genetics?
The conclusion of Mendelian genetics emphasizes particulate factors which are the determinants of inherited traits. These factors are referred to as genes. Each parent's cell contains a pair of genes for each trait under investigation. One allele for the dominant phenotype and one for the recessive phenotype are present in the F1 offspring of a cross of two pure lines.
In the 19th century, Mendel performed thousands of experiments with pea plants. He came to the further conclusion that genes are inherited as distinct, paired units from each parent. Mendel studied how parental genes diverged and whether they manifested in the offspring as dominant or recessive traits. The passing of mathematical patterns from one generation to the next was something he was aware of.
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Hurry HELP ME WITH THIS PLEASE!!!!!
The values for the speed of the scientists and the distance time graph are found as follows;
6. Please find attached the required distance time graph for each scientist
7. Newton's speed is about 1.[tex]\overline{1}[/tex] m/s
Madam Curie's speed is 2.5 m/s
Tyson's speed is 1.[tex]\overline{428571}[/tex] m/s
8. Madam Curie won the race, Tyson was second and Newton was third
9. The slope of the lines on the graphs are
The slope on Newton's graph = 1.[tex]\overline{1}[/tex]
Slope on Madam Curie's graph = 2.5
Slope on Tyson's graph = 1.[tex]\overline{428571}[/tex]
What is the slope of a linear graph?The slope of a graph is the ratio of the rise to the run of the line on the graph.
The specified information in the question are as follows;
The time it takes Newton to complete the 10 meters walk = 9 seconds
The time it takes Madame Curie to complete the distance of 10 meters = 4 seconds
The time it takes Tyson to complete the 10 meter distance while balancing the apple on his head = 7 seconds
The formula for the speed is; Speed = Distance/time
[tex]Speed = \dfrac{Distance}{Time}[/tex]
Distance = Time × Speed
Therefore, distance is directly proportional to the time of travel at a specified speed
The graph of the distance to time is therefore a straight line passing through the origin.
The coordinate of the origin (0, 0) is a point on the graph of each person.
The other point are specified by the value, y = 10 meters, and t as follows;
The points on the graph of Newton are (9, 10), (0, 0)
Newton's speed = 10 m/(9 s)= 1.[tex]\overline{1}[/tex] m/s
The point on the graph of Madam Curie are (4, 10), (0, 0)
Madam Curie's speed = 10 m/(4 s) = 2.5 m/s
Points on the graph for Tyson are (7, 10), (0, 0)
Tyson's speed = 10 m/(7 s) = 1.[tex]\overline{428571}[/tex] m/s
Please find the distance vs. time graph for each scientist created with MS Excel
7. The formula for the speed of each scientist is presented as follows;
[tex]Speed = \dfrac{Distance }{Time}[/tex]
Newton's speed = 10 m/(9 s) = 1.[tex]\overline{1}[/tex] m/s
Madam Curie's speed = 10 m/(4 s) = 2.5 m/s
Tyson's speed = 10 m/(7 s) = 1.[tex]\overline{428571}[/tex] m/s
8. The winner of the race is the scientist with the highest speed, who completes the 10 meter distance in the shortest time, which is Madam Curie
The scientist that was second is the scientist with the second fastest time, which is Tyson
The scientist that was third is Newton
9. The slope of the line is equivalent to the speed of each scientist, therefore;
The slope for Newton's distance time graph is 1.[tex]\overline{1}[/tex] m/s
Slope for the graph for Madam Curie is 2.5
Slope for the distance to time graph for Tyson is 1.[tex]\overline{428571}[/tex]
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