suppose blood is pumped from the heart at a rate of 5.4 l/min into the aorta of radius 1.1 cm. Determine the speed of blood through the aorta, in cm per second

Answer:

B) Heat is given off.

Explanation:

When heat is given off, a chemical change must have occurred and such a reaction is termed an exothermic reaction.

A chemical change is one in which;

Most chemical reactions are accompanied by heat changes.

Answer:

they will eat a lot of fish and make other animals go hungry

Explanation:

logic

As the population of large predator fish has grown out of control it will require more supply food due to which population of small fishes will decrease leading to disturbance in ecosystem.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

choice number 3 (70° degrees)

Explanation:

here he is asking that how many degrees of water will boil when the surface of water in the liquid state is 30kPa. So when it is 30kPa becomes boiled at 70°degrees. Hope it helps you!

Answer:

270g

Explanation:

Given parameters:

Concentration of NaOH  = 1.5M

Volume  = 4.5L

Unknown

Mass of NaOH added  = ?

Solution:

To solve the problem, we need to find the number of moles of the NaOH first;

 Number of moles  = concentration x volume

 Number of moles  = 1.5 x 4.5  = 6.75mol  

Now;

  Mass  = Number of moles x molar mass

 Molar mass of NaOH  = 23 + 16 + 1  = 40g/mol

  Mass  = 6.75 x 40  = 270g

The chemical in question has the following molecular formula of a compound and a molecular weight of 178 g/mol: C6H12O6 is the molecular formula, and CH2O is the empirical formula.

The empirical formula is CH2, while the molecular formula of the compound is C6H12O6. Consider 100 g of the substance as an illustration. As a result, we have 6.72 g of hydrogen, 40.00 g of carbon, and 53.28 g of oxygen. Moles of carbon are equal to 40.00 g at 1 mol and 12.01 g at 3.331 mol. A mole is equivalent to 6.72 g of hydrogen divided by one mole of hydrogen. A mole of oxygen weighs 53.28 g, whereas a mol of hydrogen weighs 16.00 g. The formula is 3.331:6.67:3.330=1.000:2.00:1 1:2:1 for moles of C, H, and O. CH2O is the empirical formula. Its empirical formula is the most straightforward formula for a compound. The true formula is an integral multiple of the empirical formula. If the empirical formula is CH2O, then the proper formula is (CH2O)n or CnH2nOn, where n = 1, 2, 3,... It is up to us to figure out what n is worth. The molecular mass of 180.18 u must be a multiple of CH2O's empirical formula mass of 30.03 u. n=180.18 u30.03 u = 6.000 ≈ 6 \s∴ In terms of chemistry, CnH2nOn = C6H12O6.

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This model represent solid state.

solid states of matter

Solids, liquids, gases, and plasma are the four basic states of matter. The artificial state is the sixth. the Bose-Einstein condensates

The fourth and most basic state of matter is solid. The least kinetic energy is held by the molecules that are tightly packed together in a solid. A solid's structural stiffness and resistance to a force applied to its surface define it.

One of the several configurations in which matter can exist is a state of matter. In daily life, we can observe four different states of matter: solid, liquid, gas, and plasma. There are numerous known intermediate states, including liquid crystal, while others, like Bose-Einstein condensates (in extremely cold temperatures), neutron-degenerate matter (in extremely high densities), and quark-gluon plasma, can only exist under very specific circumstances (at extremely high energy).

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Answer:

I think c.............

Steel is less malleable than the elements that make it.

Pure iron is exceedingly malleable and soft. Depending on the amount of carbon present, steel can be soft or hard. Although not as soft as pure iron, very low carbon steels are fairly soft.

Because they are essentially made of metal ions that are packed closely together and encased in an electron sea—the term "sea" is figurative—all metals should be malleable. This is why metal are good electrical conductors. The metal atoms may always be shown to be on planes that will allow them to slide over one another while they are submerged in this sea. The ability of a metal to retain and transport heat is also influenced by the sea, which offers additional degrees of freedom not found in a lattice.

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Explanation:

a.) the ball comes back down because of the gravitational pull

b.)the car is non living because it runs on a engine (man made)

If a person has the values for an object's density and volume, they can calculate the object's mass. Hence option B) is correct.

If a person has the values for an object's density and volume, they can calculate the object's mass. Density is defined as the mass per unit volume of an object. Mathematically, density is calculated by dividing the mass of an object by its volume. Rearranging the equation, we find that mass is equal to the product of density and volume. Therefore, if the density and volume of an object are known, multiplying them together will yield the object's mass. The other options mentioned in the question are not directly calculated using density and volume. The object's size is a broader term that encompasses various dimensions and may not be specifically derived from density and volume alone. The shape the object forms in a container and the amount of space the object takes up are influenced by both the object's mass and its dimensions, which are not solely determined by density and volume. Therefore option B) is correct.

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According to the balanced chemical equation, one mole of sulfur reacts with three moles of fluorine to form one mole of sulfur hexafluoride.

The molar volume of any gas at standard temperature and pressure (STP) is 22.4 L/mol. Since the reaction is taking place at 2.00 atm and 273.15 K, which is not STP, we need to use the ideal gas law to calculate the volume. The ideal gas law equation is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin. Rearranging the equation to solve for volume (V), we get V = (nRT)/P. Substituting the given values into the equation, we can calculate the number of moles of sulfur hexafluoride required. From there, we can convert the moles to liters using the molar volume at the given conditions. The calculation will give the direct answer for the volume of fluorine gas needed in liters.  To determine the volume of fluorine gas needed to form 545 L of sulfur hexafluoride gas at 2.00 atm and 273.15 K, we use the ideal gas law. By rearranging the equation and substituting the given values, we can calculate the number of moles of sulfur hexafluoride required.

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Answer:

The correct answer is B

Explanation:

Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.

Genetic engineering is the process in which we alter the genetic makeup of an organism to produce desired characterictics in that organism.

So we can conclude that Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.

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Answer:

N4= Tetrazete/PubChem

Cl2=Chlorine

Answer:

A)

Explanation:

Unit Test Edg 2020

Answer:

1. chemical  name: Sucrose

Explanation:

the chemical´s element amount is 3

Answer:

(b)  19.9 moles

Explanation:

To convert from moles Al to moles O₂, you need to multiply the given value by the mole-to-mole ratio of each component. This ratio is constructed via the coefficients in the balanced reaction. The desired unit (moles O₂) should be placed in the numerator to allow for the cancellation of units.

2 Al₂O₃ ----> 4 Al + 3 O₂
                    ^         ^            

26.5 moles Al           3 moles O₂
---------------------  x  ----------------------  =  19.9 moles O₂
                                 4 moles Al

Answer:

It is noticed that after five days, there is elongation of the root cells in the roots of onion in the jam bottle

Explanation:

It is noticed that after five days, there is elongation of the root cells in the roots of onion in the jam bottle. The growth of a plant is due to the availability of the growing and  dividing cells in the meristematic regions of the apical meristems. (stem cells). This site are active site for elongation and differentiation  of the stem tissues. In the apical meristem of the root cells, the cells have the potential to carry out mitosis and cell division repeatedly in order to generate newer cells for extension and development of stems and leaves. With each cell division, one cell remains in the meristem which the other increases in size and differentiate due to different genomic expression to form the meristem regions which eventually becomes the stem structure.

To prepare a final solution of 20 cc with 1% lidocaine and epi 1:150,000, you would need to combine 0.13 cc of 4% Xylocaine, 5 cc of 1:1000 epi, and 14.67 cc of diluent (such as saline) in the final solution.

To calculate the required amounts of each component, we need to consider the desired concentrations and the available concentrations of the drugs.

Desired concentration of lidocaine = 1%

Desired concentration of epi = 1:150,000

Volume of the final solution = 20 cc

the desired amount of lidocaine in the final solution is:

(1/100) * 20 cc = 0.2 cc

Next, let's calculate the amount of epi needed:

1:150,000 epi means there is 1 part of epi in 150,000 parts of the solution. So the desired amount of epi is:

(1/150,000) * 20 cc = 0.0001333 cc (approximated to 0.13 cc)

Since the available concentration of epi is given as 1:1000, which means there is 1 part of epi in 1000 parts of the solution, we can directly take 0.13 cc from the vial

To determine the amount of 4% Xylocaine needed, we can use the equation:

(amount of drug) / (final volume) = (desired concentration) / (available concentration)

(amount of Xylocaine) / 20 cc = 1% / 4%

(amount of Xylocaine) = (20 cc) * (1% / 4%) = 5 cc

Finally, the remaining volume of the final solution should be made up of a diluent, such as saline, to reach the total volume of 20 cc:

(amount of diluent) = (20 cc) - (0.2 cc + 0.13 cc + 5 cc) = 14.67 cc

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Answer:

Option 4 is the correct answer

A Ball-and-stick Model

Explanation:

The given diagram shows the model of A Ball And Stick Model.

As you can see these are balls and they are connected with those sticks.

Answer:

It will satisfy the law of conservation of mass.

Two substances must make a new substance.

All atoms on both sides of an equation must be the same.

Explanation:

Stay safe, stay healthy and blessed.

Have a blessed day !

Thank you

Answer:

microwaves

Explanation:

Microwaves and radio waves are the longest wavelengths while the shortest are gamma rays and x-rays

Answer:double displacement

Explanation:I just did it

To obtain pH 8, multiply the [H+] concentration at pH 6 by 0.01

From the question given above, the following data were obtained:

pH = –Log [H+]

8 = –Log [H+]

Multiply through by –1

–8 = Log [H+]

Take the anti-log of –8

[H+] = anti-log (–8)

[H+] = 1×10⁻⁸ M

pH = –Log [H+]

6 = –Log [H+]

Multiply through by –1

–6 = Log [H+]

Take the anti-log of –6

[H+] = anti-log (–6)

[H+] = 1×10⁻⁶ M

[H+] at pH 8 / [H+] at pH 6 = 1×10⁻⁸ / 1×10⁻⁶

[H+] at pH 8 / [H+] at pH 6 = 0.01

Cross multiply

[H+] at pH 8 = 0.01 × [H+] at pH 6

Thus, to obtain pH 8, multiply the [H+] at pH 6 by 0.01

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Answer:

c. side chain

Explanation:

c. side chain. The variable part of an amino acid, which is the unique chemical structure that distinguishes one amino acid from another, is the side chain (also known as R-group).

The side chain, commonly referred to as the R-group, is the variable component of an amino acid and the particular chemical structure that sets one amino acid apart from the others. Each amino acid shares the same fundamental structure, which consists of a core alpha carbon atom bound to a hydrogen atom, an amino group (NH₂), an acid group (COOH), and an amino group (NH₂). The particular collection of atoms connected to the core carbon is known as the side chain, and it differs amongst various amino acids. The amino acid's distinct characteristics and roles in protein synthesis and biological processes are determined by the side chain's make-up and structure.

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Answer:

The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. hope that helps

Explanation:

A=top

B=middle

C=bottom

Answer:

409.0 grams

Explanation:

total mass-(mass of salt+mass og empty beaker)

Answer:

442

Explanation:

og empty beaker + salt

Answer:

Explanation:

The relative formular mass for Lithium Chloride is 42.5 This is the sum of the relative atomic masses of Lithium-7 and chlorine-35.5.

Answer:

4170 j

Explanation:

water has low melting point

Answer:

This question is incomplete as it does not include the table. However, the functions of the systems on the table with their associated systems are;

- Releases hormones: Digestive and endocrine systems

- Supplies the body with oxygen: respiratory and circulatory systems

- Supplies the body with nutrients: digestive and circulatory systems

- Removes carbon dioxide: respiratory and circulatory systems

Explanation:

Endocrine system of the body constitutes endocrine glands that secrete hormones into the bloodstream. Example of endocrine glands are the adrenal gland, pituitary gland, hypothalamus, thyroid, ovaries etc. However, the PANCREAS, which is an organ in the digestive system is also an endocrine gland that secretes INSULIN and GLUCAGON hormones into the bloodstream. Hence, the endocrine and digestive systems releases hormones

The respiratory system comprises organs that regulate gas exchange in the body i.e. take in oxygen, take out carbon dioxide. However, the circulatory system, which comprises the arteries, veins, capillaries transports the oxygen throughout the body via the blood. The oxygen enters via the respiratory system and is circulated by the circulatory system.

Ingested food is broken down via the digestive system, which comprises of organs like small intestine, stomach, pancreas, large intestine, liver etc. The digested food releases nutrients into the bloodstream, which gets transported by the blood to other parts of the body. Hence, the circulatory and digestive systems play a part in supplying the body with nutrients.

Respiratory system via the process of gas exchange removes carbon dioxide from the body system. However, the carbon dioxide waste enters into the bloodstream (circulatory system) initially before getting transported to the lungs where the respiratory system takes over by exhalation

Answer:

I think it is the third option.

Explanation: