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Answer:

There are approximately 5 × 10¹⁰ capillaries in the human body

Explanation:

The motion of a fluid is such that the mass of the fluid flowing remains constant. This is known as the principle of conservation of mass in liquid flow.

The mass flow rate is the mass that passes a given point per unit time. According to the principle of conservation of mass, the flow rates at any two points must be equal, as long as no fluid is being added or taken away.

The principle gives rise tonthe continuity equation which is given below:

ρ₁A₁v₁ = ρ₂A₂v₂

Where ρ is density of fluid, A is internal area of the vessel or pipe the fluid is flowing through, v is velocity of the fluid

Since the density of blood is constant, the continuity equation above reduces to:

A₁v₁ = nA₂v₂

where A₁ is the area of the aorta, v₁ is velocity of bloodmin the aorta, n is number of capillaries, A₂ area of capillary, v₂ is velocity of blood in the capillary.

n = A₁v₁/A₂v₂

n = πr₁² × v₁ / πr₂² × v₂ where r₁ is radius of aorta and r₂ is radius of capillaries

n = (22/7 × 1.2² × 42) / (22/7 × 0.0005² × 0.005)

n = 4.8384 × 10¹⁰capillaries

Therefore, there are approximately 5 × 10¹⁰ capillaries in the human body

Answer:

connectivity

Explanation:

Natural and anthropogenic alterations affect the landscape. The unmeasurable use of the land for farming, cattle industry, buildings, among many other activities, has caused a severe fragmentation in the original landscape that has been seriously affecting biodiversity.    

Fragmentation occurs when a big extension is transformed into many different and smaller patches, separated by another type of cover. You can imagine, for instance, an area used for mono-culturing, which you can see as a homogeneous space of the same texture and color, and small green islands of original vegetation dispersed in this cropped area. These small islands are separated from each other by the crop.

These alterations produce patches or tesserae in the landscape. Patches are relatively homogenous areas with well-defined borders and environmental characteristics very different from those of the surrounding areas. These are like islands. You can think about patches or tesserae as the remaining pieces or units of the original landscape dispersed inside an affected bigger-sized area.

Fragmentation generates a significant loss of physical continuity between the different areas of the original habitat. It might negatively affect biodiversity by decreasing patch sizes, completely isolating them from each other, and increasing the border effect.

Many species can not survive if they are not in the original habitat. Probably they do not find enough food or shelter, or they are very exposed to predation. So they need to stay in the patch. Most of these species are not even adapted to living on the border of the patches. Eventually, fragmented areas can not support some population species that end by dying because they can not survive for a long time in that reduced place. Patches are not suitable to support too many species.

For these reasons, the connection between islands becomes so important.  To allow species to move from one place to the other, interact with other species, reproduce, find food, shelter, avoid predation. In other words, survive.  Connectivity is how the territory makes possible individuals flow or genetic flow, between the different tesserae.

Answer:

Our Sun is an example of a main sequence star.

Explanation:

Answer:

they are made from amino acids

Answer:

males do not determine the sex of offspring

Explanation:

this question lacks intellectual merit on multiple levels of analysis

Answer: Telomerase is the enzyme responsible for maintenance of the length of telomeres by addition of guanine-rich repetitive sequences. Telomerase activity is exhibited in gametes and stem and tumor cells.

Explanation:

Answer:

Piperacillin and tazobactam, imipenem and cilastatin, or meropenem may be used.

Explanation:

Antibiotics such as piperacillin and tazobactam, imipenem and cilastatin, or meropenem can be used for the treatment of Fecal coliform bacteria that causes fecal contamination. There are some other methods also used to avoid Fecal contamination i.e. boiling of water, treating water with chlorine, or UV disinfection are the methods that are used to reduce Fecal coliform bacterial infection.

A corn plant has been genetically engineered. It produces pollen that can make its own toxins. These talks and protect the corn plant against pests.Newer strains of pesticide-resistant pests may develop. Option D is correct answer.

These are the chemicals that kill the pests and these are given to the crops so that they can be saved from pests.

Bird and butterfly populations around the area may increase. It is possible if the flowers and the pollen grains number and the production is increased. The carbon dioxide level would increase in the area. In this situation the plants number gets increased.

The concentration of pesticides in a nearby lake would increase. In this situation the pest use is increased on the plants and in this situation the use of chemicals in the surrounding water resources will be increased.

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Answer:

The answer is "The patients blood viscosity would decrease, causing the blood flow to decrease in the blood pressure to also decrease".

The correct answer is: The patient’s blood viscosity would increase, causing the blood flow to decrease and the blood pressure to increase.

When the body loses more fluid than it takes in, dehydration develops. It occurs when the quantity of water and electrolytes (such as sodium, potassium, and chloride) that the body need to operate correctly are out of balance.

Numerous internal processes, such as controlling body temperature, lubricating joints, transferring nutrients, and getting rid of waste, depend on water.

Dehydration causes the amount of fluid in the blood to decrease, which causes the concentration of blood cells and other components to rise.

Blood gets thicker and flows more slowly as a result of this rise in blood viscosity, which is caused by an increase in blood cell concentration.

As a result, the blood flow decreases, and the resistance to blood flow increases, leading to an increase in blood pressure.

Therefore, in the given scenario, the patient's severe dehydration would cause an increase in blood viscosity, leading to a decrease in blood flow and an increase in blood pressure.

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Answer:

253.585 square inches

Explanation:

The figure can be decomposed into 2 rectangles and a quarter circle.

Area of the figure = area of rectangle 1 + area of rectangle 2 + area of ¼(circle)

✔️Area of rectangle 1 = Length × width

Length = 10 in

Width = 6 in

Area of rectangle 1 = 10*6 = 60 in²

✔️Area of rectangle 2 = Length × width

Length = 10 in

Width = 6 + 7 = 13 in

Area of rectangle 2 = 10*13 = 130 in²

✔️Area of ¼(circle) = ¼(πr²)

r = 9 in

π = 3.14

Area of ¼(circle) = ¼(3.14*9²) = 63.585 in²

✅Area of the figure = 60 + 130 + 63.585 = 253.585 square inches

Answer:

Option D

Explanation:

Loess is a wind blown silt that piles into high dunes which later hardens. On the other hand, the sand blown debris is known as sand dunes which are rounded hillocks and is broken by the wind.

Hence, option D is correct

Answer:

Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.

Explanation:

Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur while external regulators speed up or slow down the cell cycle.

Proteins are large and complex molecules which play many critical roles in the body. Proteins do the work in cells which are required for the structure, function, and regulation of the body's tissues and organs.

Proteins are made up of many smaller units called amino acids, which are linked together in long chains. There are 20 different types of amino acids that can be linked to make a protein.

The sequence of amino acids determines each protein's unique 3-dimensional structure and its specific function. Amino acids are coded for by a combination of three DNA building blocks (nucleotides), which are determined by the sequence of genes.

Thus, internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur while external regulators speed up or slow down the cell cycle.

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Here's a match of the descriptions with the correct phases of the ovarian cycle:

The ovarian cycle is the monthly series of changes that occur in a female's ovaries, specifically in the development and release of an egg (ovulation).

The cycle is regulated by several hormones produced by the hypothalamus, pituitary gland, and ovaries, and is divided into three main phases: the follicular phase, the ovulatory phase (or ovulation), and the luteal phase.

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Answer:

please give me brainlist and follow

Explanation:

An international research effort called the Human Genome Project, which worked to determine the sequence of the human genome and identify the genes that it contains, estimated that humans have between 20,000 and 25,000 genes. Every person has two copies of each gene, one inherited from each parent.

Answer:

D- It helps stop erosion.

Explanation:

Erosion can be defined as a geological process which typically involves the wearing out of earthen (soil) materials and the transportation of these materials by natural forces like water, wind, etc. Soil erosion is greatest when the soil is steep.

The steepness of a body such as river or stream refers to the downward slope or gradient of the body of water.

Generally, the steepness of a body affects the rate at which other materials would flow or move around. Thus, the steeper a river or stream, the greater would be its rate of erosion. Other factors that affect the rate of erosion in an area include the following; farm management, rainfall, climate, soil type, soil cover, landscape, type of wave, crops, rock strength and position of coast.

In order to mitigate or stop the rate of erosion in an environment, trees and bushes should be planted on a steep hill because they will obstruct the free flow of water, as well as absorbing it.

Answer:

35.7 g

Explanation:

yield(%) = actual yield/theoretical yield x 100

We can calculate the theoretical yield by considering the balanced chemical equation:

MnO₂ + 4HCI —> MnCl₂ + 2H₂O + Cl₂

According to the equation, 1 mol of MnO₂ reacts with 4 moles of HCl to produce 1 mol of Cl₂. So, we can write the following mole ratios:

1 mol MnO₂/4 mol HCl or 4 mol HCl/1 mol MnO₂

1 mol MnO₂/1 mol Cl₂

4 mol HCl/1 mol Cl₂

As we have the amounts of reactants in grams, we have to convert from moles to mass by using the molecular weight (MW) of each compound:

MW(MnO₂) = 54.9 g/mol Mn + (16 g/mol x 2 O) = 86.9 g/mol

1 mol MnO₂ x 86.9 g/mol = 86.9 g MnO₂

MW(HCl) = 1 g/mol H + 35.4 g/mol Cl = 36.4 g/mol

4 moles HCl x 36.4 g/mol = 145.6 g HCl

MW(Cl₂) = 2 x 35.4 g/mol Cl = 70.8 g/mol

1 mol Cl₂ x 70.8 g/mol = 70.8 g Cl₂

Now, we have to figure out which is the limiting reactant. For this, we use the stoichiometric ratio: 145.6 g HCl/86.9 g MnO₂. We multiply the actual amount of MnO₂ by the stoichiometric ratio:

70.0 g MnO₂ x 145.6 g HCl/86.9 g MnO₂ = 117.3 g HCl  < 128.0 g HCl

We need 117.3 grams of HCl to completely react with 70.0 grams of MnO₂, and we have 128 grams of HCl. So, the reactant in excess is HCl, and the limiting reactant is MnO₂.

With the limiting reactant, we calculate the theoretical yield of Cl₂. We use the stoichiometric ratio 70.8 g Cl₂/86.9 g MnO₂:

70.0 g MnO₂ x 70.8 g Cl₂/86.9 g MnO₂ = 57 g Cl₂

Finally, we calculate the actual yield of chlorine gas (Cl₂), by using the first equation:

yield(%) = actual yield/theoretical yield x 100

⇒ actual yield = theoretical yield x yield(%)/100

                       = 57 g x 62.7%/100

                       = 35.7 g

Answer:

Consumers eat plants or other animals to get their nitrogen.

Explanation:

Scientists use buoys to measure ocean conditions in specific locations over time. There are a variety of different buoys deployed in the ocean; some are attached to the ocean floor, while others drift freely in open waters. All ocean buoys, regardless of type, report some physical characteristic of the ocean or the atmosphere for later analysis.

In this virtual lab activity, you will use buoys to track a bottle as it travels on ocean currents worldwide. Problem: How can data from buoys be used to analyze ocean currents? Hypothesis: Predict the location each bottle came from using the tracking data in the Data and Observations section and the world map of major ocean currents pictured below.

For example:I predict bottle 1 is from ________canada _________, bottle 2 is from _____brazil_______,and bottle 3 is from ______carriboean islands________ based on the tracking data andworld map of currents

Answer:

So.... Because of its molecular structure, carbon dioxide is a greenhouse gas, which means it allows visible light from the Sun to pass through the atmosphere while absorbing and reemitting infrared energy, heating the Earth.

Explanation:

Answer:

What do you need help with? I see nothing attached.

Answer:

Altitude

Explanation:

Its the elevation of an object above sea level.

Answer: the answer is altitude

Explanation:

i took my quiz and got it right

hope its help;)

Answer:

286.2  pa

Explanation:

Blood speed in a normal segment of a horizontal artery ( v2 ) = 0.15 m/s

Density of blood = 1060 kg/m^3

Normal sectional area = A2

constricted sectional area ( A1 )= 1/5 A2

Determine the difference in blood pressures between the normal and constricted segments

we will apply Equation of continuity     Av = constant

Δ p = 12 PV^2

     = 12 * 1060 * ( 0.15 )^2

     = 12720 * 0.0225  =  286.2  pa

attached below is a detailed solution of the Given problem

Answer:

late 14c., "fill with disease, render pestilential; pollute, contaminate; to corrupt morally," from Latin infectus, past participle of inficere "to stain, tinge, dye," also "to corrupt, stain, spoil," literally "to put in to, dip into," from in- "in" (from PIE root *en "in") + facere "to make, do, perform" (from PIE root *dhe- "to set, put").

Explanation:

Answer:

leaves

Explanation:

The needles of pines, like those of other conifers, are well-adapted for growth in dry environments. In particular, the outer surface of pine needles has a thick waxy layer, called a cuticle, which reduces evaporative water loss.

Answer: Option (A) leaves

Explanation:

Pine trees thankfully have needles, which are thin, waxy leaves that enable them to make food year-round. The waxiness of the needles helps evergreens not lose water to evaporation.

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Answer:

False

Explanation:

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

(Pluto)

the outermost planet is technically neptune but some still consider pluto a planet. but jupiter is not the outermost planet.

Answer:

Individuals can't change what they already have, some individuals are born with favorable traits, those get passed on while others are less likely (unfavorable traits) to get passed on.