Your colleague asks you to verify her findings about a new polymer intended for use as a vascular graft. It must be reasonably elastic; otherwise, the blood will be constricted and increase its flowrate downstream with each pulse of the heart. She found that the material was sufficiently elastic for use inside the body. After running a tension test, you find that it is too brittle for use. Your colleague reviews your protocol and declares that you have either graduated from Duke or checked your eyelids for light leaks during Dr. Brudno's BME 203 class, because it definitely is adequate. Describe two mistakes you may have made. Put a (1) and (2) before each of your reasons.

Answers

Answer 1

Answer:

1.Vascular tube is used for vascular surgery and is very small in size with very small diameter and thickness,thus a little change in environment can also affect there result.

2.When testing for tension in the polymer it is very important to consider the strain rate as the increase in strain  can cause the material to  break.Therefore not only tension test but also strain test is required.

Explanation:


Related Questions

Sam can see an organelle in a plant cell under the microscope that is green. Which organelle is it most likely?
A. vacuole
B. nucleus
C. cytoplasm
D. chloroplast

Answers

it is D chloroplast
Chloroplasts

Explanation: Chloroplasts is the green color that appears in plants during photosynthesis. It is called chlorophyll in some cases

Which does a reference point provide? A-a position from which to measure future distanceB- a set of standard units for measuring displacement C-a standard method for evaluating variables D-a method for determining the speed of an object​

Answers

Answer:

A.

Explanation:

Answer:

a position from which to measure future distance

Explanation:

Hope this helps!! :)

Which of these levels of organization includes all the other levels? ecosystem, community, individual organisms, population

Answers

Answer:

An ecosystem does!

Explanation:

An ecosystem holds the others! it includes everything to make a home for organisms

Is the human body made of cells?

Answers

Answer:

yes the human body is made of cells

Explanation:Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.Cells have many parts, each with a different function.

When the herd is moving in direction the handler wants what should the handler do

Answers

Answer: the handler should retreat and reduce stress

Explanation:

grandin.com

Answer:

125.6

Explanation:

if you wrote a question from geometry, its 125.6 ft

Which of the following limits the size of a food web?

Answers

What are the answer choices?

No answer choices but I might think you're talking about

Energy

What is the percentage of the parent isotope remaining after 1 Half Life, assuming you start with 100% of a sample.

Answers

I think its 83% depending on the item etc?

PLEASE HELP. I need the answer now

Answers

Explanation:

i didnt pay attention last year soooo sorry

1 . republic
2. delegate
3. smuggling
4. indentured servant
5. dissenter
6. duty
7. liberty
8. proclamation
9. boycott
10. repeal

A. a worker who contracted with American colonists for food and shelter in return for his or her labor
B. the quality or state of being free
C. an official, formal public announcement
D. one who opposes official or commonly held views
E. a representative democracy where citizens choose their lawmakers
F. to cancel a law
G. the act of importing or exporting secretly, in violation of the law
H. to refuse to purchase certain goods or services
I. a representative to a meeting
J. a tax on an imported good
what are the answers ?

Answers

Answer:

the answer is a

Explanation:

i did that test an a is right

When making bread, yeast, flour, sugar, and water are mixed together and set in a warm area to rise. A student cut the rising dough and discovered tiny
pockets of gas. This gas formation was causing the bread to rise. What gas molecule is most likely in the dough?
OA. lactic acid
OB. oxygen
OC carbon dioxide
OD alcohol

Answers

Answer:

Carbon Dioxide

Explanation:

I just know

The carbon dioxide is the gas molecule most likely in the dough. Thus, option C is correct.

What is Carbohydrates?

Carbohydrates is defined as biomolecule that contains carbon hydrogen and oxygen in a ratio of 2:1. Carbohydrates are mane source of energy of the body they work as fuel for the brain, kidneys central nervous system and heart muscle. [tex]Cn(H2O)n[/tex] is the basic formula for all carbohydrates . But this formula have limitation i.e it applies where same amount of carbon and water are use.

Basically, the terms carbohydrate was used to describe compounds that have really contains carbohydrates. Because they had simple formula [tex]CH20[/tex]. In modern Era carbohydrates are classified on the basis of their structure not on their formulae. Such as aldehydes and ketones are now known as polyhydroxy.

Therefore, the carbon dioxide is the gas molecule most likely in the dough. Thus, option C is correct.

Learn more about carbohydrate here:

https://brainly.com/question/14614055

#SPJ6

Heat Transfer discussion based question

Your response needs to be AT LEAST 2 paragraphs.

DISCUSSION QUESTION: How is thermal energy transferred?

Answers

Answer: Thermal energy flows from a warmer material to a cooler material.  When thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three ways heat is transferred into and through the atmosphere: Radiation, conduction and convection.

Radiation is when energy, in the form of electromagnetic radiation, is emitted by a heated surface in all directions and travels directly to its point of absorption at the speed of light; thermal radiation does not require an intervening medium to carry it. Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it.

Is the composition of air consistent

Answers

Answer:

The air is really a mixture of many different gases, and each gas has its own properties. The composition of air is not constant. It can vary from time to time and place to place.

Answer:

The composition of air is not constant. It can vary from time to time and place to place.

Explanation:

NEED HELP ASAP * IS MY ANSWER
The electrons in a water molecule are shared unevenly between the oxygen and hydrogen. This creates

A)a covalent bond that can never be broken

B)a slightly negative charge on the oxygen atom *

C)a slightly negative charge on the hydrogen atom

D)a strong ionic bond

Answers

Answer:

Its B (a slightly negative charge etc..)

An organelle found in most eukaryotic cells described as cellular power plants because their primary function is to convert materials into energy in the form of atp

Answers

Answer:

This kind of cell does not have a large central vacuole. ... An organelle found in most eukaryotic cells described as "cellular power plants", because their primary function is to convert organic materials into energy in the form of ATP. Nucleolus. This organelle, found in the nucleus, produces ribosomes.

:

please help. i’m literally going to fail biology

Answers

Answer: Cell biology encompasses both prokaryotic and eukaryotic cells and can be divided into many sub-topics which may include the study of cell metabolism, cell communication, cell cycle, biochemistry, and cell composition. Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions. The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. ... The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles. The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. ... The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles.

Explanation:

Which correctly lists three features of a rock's grains that determine its texture?
CO
color, pattern, size
O formation, color, shape
O pattern, color, formation
O shape, pattern, size

Answers

Answer:

shape, pattern, size i took the test

Explanation:

Answer:

shape pattern and size

Explanation:

Why is the lynx called a specialist?

Answers

Answer:

I can't better person to specialized the lynx people

What term is used to describe the state in which molecules are evenly distributed in the available space?

Answers

Answer:

equilibrium

Explanation:

The term that is used to describe the state in which molecules are evenly distributed in the available space is dynamic equilibrium.

The molecules of a substance refers to a group of two or more atoms of the substance held together b chemical bonds.

Molecules of solids are fixed about a particular point except they are dissolved in solution. Molecules of liquids and gases, however, move about randomly.

When the molecules of a particular substance are more to one side between two adjacent points in a space, a gradient is created. However, when the molecules of the substance are uniformly distributed in a space, they are said to be in dynamic equilibrium.

More on the movement of molecules can be found here: https://brainly.com/question/2284581

why do the processes and events dating back to the big bang eventually led to the existence of life on earth​

Answers

Answer:

Stars are formed such that their death led to the creation of life.

Explanation:

The Big Bang theory was developed in 1927. This theory helps to understand how the universe was created. According to this theory, hydrogen gas was created through a process of expansion and explosion. As a result, stars are formed such that their death led to the creation of life.

Earth formed around 4.54 billion years ago which is equal to approximately one-third of the age of the universe.

What type of mining would be used to extract a vein of ore from deep underground?
A: strip mining
B: open-pit mining
C: shaft mining
D: offshore mining

Answers

Answer:

The primary methods used to extract minerals from the ground are: Underground mining. Surface (open pit) mining. Placer mining.

Which explains how the formation of the East African Rift Valley formed?

Answers

Answer:

c

Explanation:

because of the arrows are pointing the direction of witch  it went to make the rift

Ccccccccccccccccccccccccccc it’s correct

The___ releases enzymes that digest proteins.

A. pancreas
B. liver
C. gallbladder​

Answers

Answer:

A. Pancreas

Explanation:

Answer:

Pancreas

Explanation:

The pancreas contains exocrine glands that produce enzymes important to digestion. These enzymes include trypsin and chymotrypsin to digest proteins; amylase for the digestion of carbohydrates; and lipase to break down fats.

the cell membrane from what​

Answers

Answer:

Plants

Explanation:

The cell membrane is the plants.

Which of these particles is the smallest?

Group of answer choices

a proton

an atom

a nucleus

an electron

Answers

Answer:

Electron

Explanation:

This would be the smallest electron since its mass is the smallest.

Hey guys im having troubles with this! could anyone please help me with it, if so that would be great and ill give you a brainliest

Answers

Answer: the answer is glucose you are correct

Explanation:

hope it helped and did you get it wrong

Which example illustrates commensalism and NOT mutualism?

Answers

Answer:

you i need these points thx

Explanation:

Consider a hypothetical scenario in which the genes that determine body color, eye color, and wing type in fruit flies occur on the same chromosome. To determine the order of the three genes on the chromosome, a researcher looks at hundreds of flies and makes these observations: 90% of flies with red eyes have curly wings. 75% of flies with red eyes have black bodies, whereas the remaining 25% have brown bodies. 1% of flies have curly wings, white eyes, and black bodies. Based on these observations, what is the most probable location of each gene on the given chromosome

Answers

Answer:

The most probable location on the chromosome of each gene is:

wing shape gene ------- eye color gene -------- body color gene

Explanation:

To know if two genes are linked, we must observe the progeny distribution. In a tri-hybrid cross, If individuals, whos genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1:1:1:1:1. If we observe a different distribution, that is that phenotypes appear in different proportions, we can assume that genes are linked in the heterozygote parent.

We can recognize the parental gametes in the descendants because their phenotypes are the most frequent, while the double recombinants are the less frequent. And simple recombinant gametes produced by the cross, which frequencies are intermediate.  

By comparing the parental and the double recombinant we will realize which is the allele that changes in position. The position of this gene is in the middle of the other two genes because in a double recombinant only the central gene changes position in the chromatid.

So, according to this knowledge and the available information in the problem we can estimate the position of the genes in the chromosome.

Phenotypic proportions:

90% of flies with red eyes have curly wings (Parental)75% of flies with red eyes have black bodies (Simple recombinant)25% of flies with red eyes have brown bodies (Simple recombinant)1% of flies have curly wings, white eyes, and black bodies (Double recombinant)

90% of individuals are red-eyed and curly-winged. This is a high frequency, which means that this is the parental phenotype. The other parental phenotype must be white eyes and straight wings.

Flies with curly wings, white eyes, and black bodies represent the lower proportion (1%) so this phenotype must be the double recombinant.

Flies with red eyes and black bodies, and flyes with red eyes and brown bodies are intermediate in proportion, so they must be simple recombinant phenotypes.

Parental)

Red, Curly  

White, Straight

Double recombinant)

White, Curly, Black  

Red, Straight, Brown  

Simple recombinant)  

Red, Black

Red, Brown

In the chromatid, there are two regions, Region 1 (from the first gene to the gene in the middle), and region 2 (from the gene in the middle to the gene of the other extreme).

The fact that both simple recombinants are red, tells us that the eye color gene and the body color gene are together, and the recombination occurred either in region 1 or 2.  

We know that the double recombinant is White, Curly, Black. We also know that the eye color gene and the body color gene are together, so one of these two must be in the middle.

Parentals are red and curly, which means that the eye color gene and wing shape gene are also together. This leads us to assume that the eye color gene is in the middle.

Finally, the fact that the double recombinant is White, Curly, Black, and knowing that the eye color is in the middle and that both the extreme alleles change position, we can assume that the parental Red, Curly is also black, while the other parental is white, straight and brown. So:

Parental)  

Curly ------ Red ------Black (90%)

Straight ----- White ----- Brown

Simple recombinant)

Curly -----White-----Brown

Straight-----Red -----Black (75%)

Curly----Red-----Brown (25%)

Straight ----White-----Black

Double recombinant)

Curly-----White------Black (1%)

Straight----Red------Brown    

Sara and michael tested electromagnets to see the size of wire

Answers

Answer:

Please u didn't finish your question. Please re-write ur question so that people who know the answer to ur question answer it. Hope u don't find it ..... to report it.

Thanks!!!☺✨

Which process is a nuclear division mechanism that halves the chromosome number and is a necessary part of gamete formation and sexual reproduction

Answers

Answer:

Meiosis

Explanation:

The answer is Meiosis

Georgia has hypochondriasis, and Leo has a pain disorder. Which of the following do Georgia and Leo most likely
have in common?
O a history of normal medical exams
O significant pain in a specific area
O a preoccupation with the idea of being sick
O an onset of the disorder before the age of 30

Answers

Answer:

C. a preoccupation with the idea of being sick

Explanation:

Hypochondriasis and pain disorder are two conditions that deviates from the normal human health. Hypochondriasis, also known as health anxiety, is a condition whereby an individual is fearfully worried about having a serious illness. On the other hand, pain disorder is a condition in which pain results in certain areas of an individual's body due to psychological disposition of such individual i.e. his/her mindset.

Based on the description of both conditions above, it can be observed that both hypochondriasis and pain disorder are as a result of a preoccupied mindset of being sick. One is worried PSYCHOLOGICALLY about being terribly ill (Hypochondriasis) while the other PSYCHOLOGICALLY induces pain on him/herself.

Answer:

A

Explanation:

got it right on edg 2020-2021

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