Most americans overconsume? calcium. fiber. added sugars. potassium.

Body temperature is controlled by a negative feedback control system.

What is negative feedback?

In biological systems, a type of control known as negative feedback occurs when a process's output lowers its own stimulus. A common regulation mechanism in many biological responses is feedback. The body may regulate numerous aspects of its internal environment by permitting particular routes to be switched on and off. This is like turning a switch. Feedback enables a pathway's output to operate a switch. Negative feedback, often known as a "negative feedback loop," happens when a pathway's end product disables the corresponding metabolic step.

In order to maintain body temperature, the hypothalamus reacts to this information by directing nerve impulses to effectors. For instance, the hair erector muscles tighten up if we get too cold. As a result, a layer of air is trapped near to the skin, raising the skin hairs. Systematic negative feedback regulates body temperature.

Thus the hypothalamus is the vital organ for this system.

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One of the hydrogens in the NH3 is replaced in the first reaction by the methyl group, or -CH3. The NH3 can have more than one H substituted for it, therefore the final product frequently comprises a blend of methylamine, dimethylamine, and trimethylamine.

A halogenoalkane and ethanolic ammonia can be used in a nucleophilic substitution process to produce primary aliphatic amines like methylamine (CH3NH2).

NH3 + CH3Cl = HCl + CH3NH2

The process is challenging because any unreacted ammonia can react with the generated HCl:

NH3+HCl yields NH4Cl.

Since the N in CH3NH2 still has a single pair of electrons, it can act as a base and interact with the HCl that is created in one of the following ways:

CH3NH2+HCl becomes CH3NH3+Cl.

or as a nucleophile and react with any chloromethane that hasn't been reacted:

(CH3)2NH + HCl = CH3NH2 + CH3Cl

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The composition, in atom percent, of an alloy that consists 90.5 wt Ag and 9.5 wt Cu is 84.5% and 15.2%.

Here, the lever rule is used to determine the composition of co-existing phases which are, Ag and Cu, of an alloy.

The given data is :

To calculate composition of silver, expression used is,

  C(Ag) =                W(Ag) × M(Cu)                 x 100

                ( W(Ag) × M(Cu) + W(Cu) × M(Ag) )

Substituting the values in the above expression,

  C(Ag) =                ( 90.5 × 63.55 )                x 100

                    ( 90.5 × 63.55 + 9.5 × 107.87 )

        C(Ag) = 84.5%

To calculate composition of copper, expression used is,

  C(Cu) =                W(Cu) × M(Ag)                  x 100

                ( W(Ag) × M(Cu) + W(Cu) × M(Ag) )

Substituting the values in above expression,

  C(Cu) =             (9.5 × 107.87)              x 100

                ( 90.5 × 63.55 + 9.5 × 107.87 )    

        C(Cu) = 15.2%

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Answer:

Lu

Hf

Ta

Explanation:

Lu- Lutecium
Atomic Number- 71
Atomic Mass-174.967

Hf- Hafnium
Atomic Number-72
Atomic Mass178.492

Ta- Tantalum
Atomic Number-73
Atomic Mass-180.948

The chemical elements that meet the criteria are Hafnium (Hf) and Tantalum (Ta).

The atomic number represents the number of protons in the nucleus of an atom, while the atomic mass represents the total mass of protons and neutrons in the nucleus of an atom.

Elements with atomic numbers greater than 70 are located in the bottom rows of the periodic table, known as the "lanthanides" and "actinides."

So, Atomic Number > 70 and Atomic Mass < 181.2 u

1. Hafnium (Hf) - Atomic Number: 72, Atomic Mass: 178.49 u

2. Tantalum (Ta) - Atomic Number: 73, Atomic Mass: 180.95 u

3. Tungsten (W) - Atomic Number: 74, Atomic Mass: 183.84 u

4. Rhenium (Re) - Atomic Number: 75, Atomic Mass: 186.21 u

Therefore, the chemical elements are Hafnium (Hf) and Tantalum (Ta).

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Answer:

a water molecule.  

Explanation:

The two reacting groups are a carboxylixc acid group (-COOH) and an amine (-CNH2).  The forms the peptide link (-C-CO-N-C) and a molecule of water is released (H2O).

The molar absorptivity of the solute that absorbs 86% wavelength of light when the beam passes through a 1.0cm cell containing a 0.16M solution is 5.375 mol L⁻¹ cm⁻¹

According to Beer-Lambert law,

"The concentration of a solution may be determined by measuring its absorbance since there is a linear relationship between the concentration and the absorbance of the solution."

A = εbC ......(i)

Where A ⇒ Absorbance

ε ⇒  Molar absorptivity

b ⇒ Length of the light path

c ⇒ Concentration

Now, A = 86%

b = 1.0cm

C = 0.16M

From (i)

A = εbC

0.86 = ε × 1 × 0.16

0.86 = ε × 0.16

ε = [tex]\frac{0.86}{0.16}[/tex] mol L⁻¹ cm⁻¹

ε = 5.375 mol L⁻¹ cm⁻¹

Therefore, the molar absorptivity of the solute is 5.375 mol L⁻¹ cm⁻¹

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Answer:

A, C And B

Explanation:

mark me brainlest

Answer:

A.✅(maybe)

B.✅

C.✅

D.✅

Explanation:

For A. if the symbol is given then answer can be determined. If symbol is V then it's true, if other then false

A 54-year-old client has a cholesterol level of 240 mg/dl (6.2064 mmol/l).  this client would have a high serum concentration of cholesterol.

Individuals or groups seeking professional advice or services, such as lawyers, accountants, advertising agencies, and architects. Those who receive benefits or services from social welfare corporations, government agencies, etc. Someone who is under the patronage of someone other than the customer.

An example client is a student teaching at a university writing center. A terminal or computer is connected to the server. A person receiving help or advice from a professional (lawyer, accountant, social worker, psychiatrist, etc.). A client, used in home and business networks, is any computer hardware or software device that requests access to services provided by a server. A client is usually considered a requesting program or user in a client/server architecture.

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Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings illustrates Stabilizing selection.

Stabilizing selection is a natural selection in which stabilized traits are selected rather than any extreme traits by the nature. Nature do not favors any drastic change in the traits over the years.

Stabilizing selection is often confused with or misunderstood as negative or purifying selection.

Stabilizing selection favors intermediate variants promoting survival of the species.

Average phenotype is selected and continuously dominates in coming generations.

This natural selection helps species to adapt stable phenotype for better survival rate.

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Pepsin can begin the digestion of protein in the stomach after it is converted from pepsinogen by Hydrochloric acid (HCl)

Hydrochloric acid (HCl) converts the pepsinogen to pepsin. It breaks down the proteins into the peptides.

                    Pepsinogen ------HCl-----> Pepsin

HCl maintains a pH of 2.0 in the stomach.

Pepsin is a digestive enzyme which breaks down the protein in the stomach.

When pepsinogen and hydrochloric acid are present in the gastric juice together, pepsin takes its active form, because HCl is a very strong acid. It denatures the protein. It degrades the extra polypeptide of pepsinogen. This extra polypeptide covers the active site.

Chief cells of gastric regions secretes the enzyme pepsin in an inactive form called pepsinogen. A low pH of 1.5 to 2 activates pepsin.

Pepsin has many uses as it is used in the treatment of indigestion and pancreatitis. It helps in the digestion of food.

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The ion is sodium ion.

An ion is obtained by the removal of an electron from an atom. An ion could be positively charged or negatively charged. If the ion contains more electrons than protons then it is positively charged and vice versa.

An ion is positive when electrons are lost and the ion is negative when electrons are gained. In a negative charge, the electron cloud spreads out and the ion becomes larger. When we have a positive ion, the ion is smaller than the neutral atom.

Now, we can see that neon has an atomic number of 20 thus it has 10 electrons. If the ion contains one more proton then the atomic number of the element is 11. We are told that it contains two more neutrons hence the mass number is 22.

Given that the both species have the same number of electrons thus the ion must be sodium ion.

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Microscale reactions involve reaction mixtures with volumes of 5 ml or less than 5 ml.

The benefits of microscale chemistry are as :

Microscale reactions, delay with extremely small amounts of reagents and solvents, which reflects in the name,  the reactions mainly work with 300 mg of compounds and solvent with volumes of 5 ml or less than 5 ml.

The benefits of such kind of chemistry are such as the first there is the involvement of less time in conducting the procedure, it allows repetition if something fails, second beacuse of usage of less chemical, lesser use of glassware of it is cost efficient, next there is a reduction in safety hazards such as possible explosions, and it efficient as it leads to minimizing in the quantity of waste.

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The density of water at room temperature is 1.0 g/ml.

Density is defined as the mass per unit volume. It gives the denseness of a given substance in a specific space. Different substances have different densities.

The formula to calculate the density is:

                                        ρ =m/v

where,

ρ is the density, m is the mass of the object and V is the volume of the object. The SI unit of density is kg/m³, but we use g/ml for our convenience.

For example, the density of water is 1000 kg/m3 but we convert it into 1.0 g/ml.

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Answer:

1. there are 29,000 grams present in 29 kilograms

2. there are 2000 millimeters present in 2 meters.

check out this conversion table if you get stuck again! :)

If 0.141 MOL of Lauric acid has a mass of 28.2 g, the empirical formula of lauric acid is C₁H₂O₁.  And the molecular formula of lauric acid is C₁₂H₂₄O₂.

The empirical formula is the simplest whole number ratios of the moles of the compounds. They are the atoms present in the compound.

The molecular formula tells the total number of atoms present in the element of a compound.

The empirical formula of lauric acid is C₁H₂O₁. if 0.141 MOL of lauric acid weighs 28.2 g. Lauric acid's chemical formula is C₁₂H₂₄O₂.

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It is given that volume & density of liquid = 30.0ml = 1.52 g/ml

is read Density is as 1.529  g/ml

mass of Ime of liquid is 1.529.

option A is correct.

So, the mass of 30 ml liquid. = (1.52 x 30 g/ml ml =

1.529 X 30 g

45.69 g

the question is incomplete

A liquid is a nearly incompressible fluid that conforms to the shape of its container but maintains (nearly) constant volume regardless of pressure. As such, it is one of the four fundamental states of matter (the others being solids, gases, and plasmas) and is the only state with a definite volume, but no fixed shape. Liquids are made up of tiny vibrating particles of atom-like matter held together by intermolecular bonds. Like gases, liquids can flow and take the form of containers.

The volume of a liquid is fixed, but the shape is not. Examples of liquids are water, oil, and blood. A liquid is a state of matter that has a fixed volume but no fixed shape. That is, the liquid takes the shape of its container. The matter is something that takes up space and has weight. Solids keep their shape, liquids take the shape of their containers, and gases fill their containers.

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You have to calculate the mass of a 30.0 mL liquid sample with density of 1.52 g/mL, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass?

Select one:

a. If 1 mL of a liquid has the mass of 1.52 g, then 30.0 mL has the mass of _____ g.

b. If 1.52 mL of a liquid has the mass of 1 g, then 30.0 mL has the mass of _____ g.

The final temperature of the gas is 137°C at which it must be heated to occupy the volume of 557 ml.

Given,

V₁= 371ml

V₂ = 557 ml

T₁ = 0°C or 273 okay

We ought to locate the very last temperature of the fuel that must be heated.

as the cylinder is transferring freely, the pressure is equal to the outside pressure, i.e., 1 atm, beneath all situations.

consequently, by using the use of Charles regulation, we get

V₁ / T₁ = V₂ / T₂

where V₁ and V₂ are preliminary and very last volumes

and T₁ and T₂ are preliminary and very last temperatures (in Kelvin).

accordingly, the very last temperature is

T₂ = V₂ × T₁ / V₁

Or, T₂ = 557 x (zero+273) / 371

Or, T₂ = 410 okay

Or, T₂ = 137°C

consequently the final temperature is 137°C.

The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius)

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Answer:

They are called inert gases because they are stable and non-reactive. They have a full outer shell of valence electrons which gives them little tendency to participate in chemical reactions.

Explanation:

They are also know as the "noble" gases.

The melting point and the normal boiling point of water in respective temperatures in kelvins are 273 and 373. The correct option is 5.

The boiling point is the point of water when the water vapor of the water is equal to the water vapor of the atmosphere.

The melting point is the point when a solid-state converts into liquid, and changes its physical state.

In Celsius, the boiling point is 100⁰C

In Kelvin, 273 + 100 = 373 K

The melting point is ice is 0⁰C

273 + 0 = 273 K

Thus, the correct option is 5. 273 and 373.

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Answer:

Explanation:

intermolecular forces mediated by hydrogen bonding are disrupted when ice melts.

True, the specific heat capacity of an object depends only on the substance from which the object is made.

Specific heat capacity is defined as the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.

The SI unit of specific heat capacity is joule per kelvin per kilogram.

The specific heat capacity at constant volume is written as,

[tex]C_{V} = (du/dt)_{V}[/tex]

The specific heat capacity at constant pressure is written as,

[tex]C_{P} = (dh/dT)_{P}[/tex]

here, u is the internal energy of system in kJ/kmol and h is the enthalpy of system in kJ/kmol.

For an Ideal gas the relation between heat capacity at constant volume and at constant pressure can be written as ,

[tex]C_{P} - C_{V} = R[/tex]

Specific heat capacity is an intensive property i.e., independent of quantity. No matter how much substance we have, its ability to absorb heat energy at a particular temperature is the same.

So, we can say that the specific heat capacity of an object depends only on the substance from which the object is made and not on its quantity.

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The best site for tritium labeling would not exchange the tritium ions for protons in water. All of the N−H sites (II−IV) would readily exchange tritium protons due to their lone pair-facilitating protonation and subsequent tritium exchange with water, but the C−H site (I), lacking a lone pair, would retain its tritium label.

Water is an inorganic, clear, tasteless, odorless, nearly colorless chemical substance that is the main component of the earth's hydrosphere and the fluid of all known living organisms. Although it provides no food, energy, or organic micronutrients, it is essential to all known forms of life.

There are three atoms in the water molecule. Two hydrogen atoms (H) and one oxygen atom (O). This is why water is sometimes called H2O. One drop of water contains billions of water molecules. Water is wet in the sense that it is a highly mobile liquid. This is because the molecules are fairly loosely bound and thus have low viscosity.

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Answer:

C. The element that is oxidized loses electrons, and the element that is reduced gains electrons.

Explanation:

When an element is oxidized, it loses electrons. But when an element is reduced, it gains electrons. However, an oxidizing agent oxidizes something else, and gets reduced, therefore gaining electrons

Answer:

It regulates metabolic activity of a cell

It promotes the growth of new cell and cell multiplication.

It produce energy

Answer:

As mitochondria is known as powerhouse of cell,its functions are:

It produces energy required for the cell.

It stores the energy.

It promotes cell growth and cell multiplication.

The protons located on the unlabeled carbon atom belong to a proton set.

An atom is a particle of matter that uniquely defines a chemical element. Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.

Atoms are the building blocks of matter that cannot be broken down into smaller pieces by chemical processes. Most atoms are made up of three particles: protons, neutrons, and electrons. The defining particle that identifies an atom is the number of protons it contains. A particle without protons is not an atom.

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d5 electron count can exhibit both high-spin and low-spin states in an octahedral complex

Electron is a free, open-source software framework developed and maintained by GitHub. This framework is designed to build desktop applications using web technologies rendered using a variant of the Chromium browser engine and a backend using the Node.js runtime environment.

Electrons are negatively charged subatomic particles that are free to (not) bond with atoms. Electrons bound to atoms are one of the three main types of particles within atoms. The other two are protons and neutrons. Electrons, protons, and neutrons together form the nucleus.

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Start by setting up your materials you would put one plant in mulch and one without. After 2-3 weeks of proper care of the plants you record your findings, did the plant grow more without without the mulch?

At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is 1.100

Here at a pH of 7.25, the average Glu side chain is and protonated negatively charged so used henderson hasellbalch equation so ph=pka+log[A+]/[HA] the side chain carboxylic acid functional group of the glutamic acid molecule has a pKa of 4.1 and therefore exists almost entirely in its negatively charged deprotonated carboxylate form at pH values greater than 4.1; therefore, it is negatively charged at physiological pH ranging from 7.35 to 7.45

Glutamic side chain is 4.25

At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is 1.100

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The mole is the si unit that expresses the amount of substance

It provides a specific measure of the number of atoms or molecules in a bulk sample of matter. A mole is defined as the amount of substance containing the same number of discrete entities (atoms, molecules, ions) as the number of atoms in a sample of pure 12C weighing exactly 12 g

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