Is time a property of matter?why is it important to measure time?

Answers

Answer 1

In accordance with this view, time is locally generated and a property of matter since time at its most basic level is made up of the frequency oscillations of matter particles.

Time flows and flows like a river. Time moves forward and has a direction. One thing follows another in time. There is a definable duration to time, a space between events. Time was defined as a physical entity by Einstein's general theory of relativity because it is a component of space-time, the gravitational field created by large objects. Time moves more slowly when a mass like the Earth is nearby because the existence of mass warps space-time.

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Related Questions

How does the curing basically take place?

Answers

Explanation:

The first involves keeping the surface of the concrete moist by the use ponding, spraying/sprinkling, damp sand or damp hessian.

The second prevents the loss of moisture from the concrete by covering it with polythene sheeting or leaving the formwork in place.

The third involves the use of spray or roller applied curing compounds.

Define global warming potential

Answers

Answer:

Global warming potential (GWP) is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide (CO 2).

Global warming potential is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide. GWP is 1 for CO₂. For other gases it depends on the gas and the time frame. Carbon dioxide equivalent is calculated from GWP.

the kind of light coming from a substance

Answers

The light that comes from substance it polar light

A weak acid has a molar mass of 162 g mol-1. Analysis of a 0.8821 g sample showed the composition by mass is 0.0220 g H, 0.3374 g P, and the remainder to be O. Determine its empirical and molecular formula.

Empirical

Molecular

Answers

1. The empirical formula of the weak acid is H₂PO₃

2. The molecular formula of the weak acid is H₄P₂O₆

Data obtained from the question Mass of compound = 0.8821 gH = 0.0220 gP = 0.3374 gO = 0.8821 - (0.0220 + 0.3374) = 0.5227 gEmpirical formula =? Empirical formula =? Molecular formula =?

1. How to determine the empirical formula

The empirical formula of the compound can be obtained as follow:

Divide by their molar mass

H = 0.0220 / 1 = 0.022

P = 0.3374 / 31 = 0.01

O = 0.5227 / 16 = 0.03

Divide by the smallest

H = 0.022 / 0.01 = 2

P = 0.01 / 0.01 = 1

O = 0.03 / 0.01 = 3

Thus, the empirical formula of the compound is H₂PO₃

2. How to determine the molecular formula Empirical formula = H₂PO₃Molar mass of compound = 162 g/molMolecular formula =?

Molecular formula = empirical × n = mass number

[H₂PO₃]n = 162

[(1×2) + 31 + (16×3)]n = 162

81n = 162

n = 162 / 81

n = 2

Molecular formula = [H₂PO₃]n

Molecular formula = [H₂PO₃]₂

Molecular formula = H₄P₂O₆

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how light behaves as it relates to its nature (waves or particles).
Light travels as
and interacts with matter as

Answers

Light travels as a "wave" and interacts with matter as a "particle".

Electromagnetic radiation that the human eye can detect as light. From radio waves with wavelengths measured in metres to gamma rays with wavelengths shorter than roughly 1 1011 metres, electromagnetic radiation occurs throughout a very broad range of wavelengths. The wavelengths of light that are visible to humans fall into a very small range within that wide spectrum, ranging from about 700 nanometers (nm; billionths of a metre) for the red light to roughly 400 nm for violet light.

Infrared and ultraviolet are two spectral bands that are close to the visible band and are frequently referred to as light as well. A fundamental physics constant, the speed of light in a vacuum is currently accepted to be 299,792,458 metres per second.

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Calculate the mass of potassium hydroxide, KOH, required to prepare 174.59 cm3 of a 0.864 mol dm-3 solution.

Answers

Taking into account the definition of molar concentration and molar mass, the mass of potassium hydroxide, KOH, required to prepare 174.59 cm³ of a 0.864 mol/dm³ solution is 8.45988 grams.

Definition of molarity

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by:

Molarity= number of moles÷ volume

Definition of molar mass

The molar mass of substance is defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

Mass of potassium hydroxide

In this case, you know that:

Molarity= 0.864 mol/dm³Volume= 174.59 cm³= 0.17459 dm³ (being 1 cm³= 0.001 dm³)

Replacing in the definition of molar concentration:

0.864 mol/dm³= number of moles÷ 0.17459 dm³

Solving:

0.864 mol/dm³ ×0.17459 dm³= number of moles

0.1508 mol= number of moles

The molar mass of KOH is 56.1 g/mol. So, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 56.1 grams, 0.1508 moles of the compound contains how much mass?

mass= (0.1508 moles×56.1 grams)÷ 1 moles

mass= 8.45988 grams

In summary, the mass of potassium hydroxide, KOH, required to prepare 174.59 cm³ of a 0.864 mol/dm³ solution is 8.45988 grams.

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why do we have to multiply the atomic mass of the oxygen to get 32?

Answers

Oxygen in its molecular form exists as
O3. The atomic mass of oxygen atom = 16 g/mol. The molar mass of O2
= 2 x 16 = 32 g/mol
It means, 1 mole of the Oxygen will have mass = 32 grams

Draw the structural formula for cis-1,3-dimethylcyclopentane

Answers

What distinguishes aliphatic from aromatic compounds?

Aliphatic compounds, on the other hand, are organic substances whose carbon atoms link with one another in open chains, either straight or branched, as opposed to containing a benzene ring. Aromatic compounds are organic substances with a planar unsaturated ring of atoms that is stabilized by an interaction of the bonds forming the ring. As a result, the primary distinction between aromatic and aliphatic chemicals is that aromatic compounds lack a cyclic structure while aliphatic compounds have straight, branching, or cyclic structures. Additionally, while the majority of aliphatic molecules are odorless, all aromatic compounds have a sweet, pleasant fragrance.

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Consider the atom with the chemical symbol Ru.
What would be the mass number for an atom of Ru which has 53
neutrons?

Answers

Answer: 97

Explanation:

The element Ru is Ruthenium which has 44 protons.

In this case, our atom is an isotope with 53 neutrons.

With this information, we can use the mass number formula to find this atom's mass number.

mass number = protons + neutrons

mass number = 44 protons + 53 neutrons

mass number = 97

Questions
Q1.
Use the Periodic Table on page 2 to help you answer this question.
Give the name or symbol of
(a) the element in group 3 and period 4.

Answers

Gallium is the element that belongs to the group 3 and the fourth period. Ga is symbol of Gallium.

The element gallium has an atomic number of 31.While highly pure gallium is covered in a dazzling silvery colour, solid gallium is a blue-grey metal with an orthorhombic crystalline structure.It is a crucial part of numerous semiconductors. Due to its capacity to transform power into light, it is additionally used in red LEDs (light emitting diodes).Because of its high boiling point, it is perfect for recording temperatures that would cause a thermometer to vaporise.From iron pyrites, zinc blende, germanite, and bauxite, this metal can be readily removed as a byproduct.Because gallium is a corrosive chemical, it can cause serious skin and eye burns asse well as significant irritation.

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Rather than saying the electrons transition
between energy levels to produce the colors in fireworks, how might
mechanical model? What does this tell you about the energies of the
you refine this description using your new knowledge of the quantum
orbitals?

Answers

When the electrons get excited it move from lower level to higher energy level and gain energy but when electrons pumped back to there lower energy level the excess energy get emitted as light.

What is electron transition?

Electron transition can be defined as when an atoms or molecules absorbs radiation there electron get excited and jump from lower energy level to higher energy level and when an atom or molecule emit radiations energy it come back to its original place i.e. to the lower energy state.

Electron transition is based on Franck-Codon principle.

According to this principle electron transition occur without changes in position of there nuclei in the molecular entity and its environment.

Thus, when the electrons get excited it move from lower level to higher energy level and gain energy but when electrons pumped back to there lower energy level the excess energy get emitted as light.

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A rectangular piece of copper, 2.13 cm by 0.79 cm by 1.14 cm, weighs 17.11g. What is the density of the copper?

Answers

Density of copper is 8.92 g/cm3.

The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol(p), although Latin letter D may also be used.

Given:

weight of copper = 12.11 g

Volume =  2.13 cm * 0.79 cm * 1.14 cm

            = 1.918 cm3

As we know that ,

Density = mass / volume

  d = m/v

 d  = 17.11 / 1.918

density = 8.92 g/cm3

Density of copper is 8.92 g/cm3.

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A 0.4042 g sample of a pure soluble bromide compound is dissolved in water, and all of the
bromide ion is precipitated as AgBr by the addition of an excess of silver nitrate. The mass of
the resulting AgBr is found to be 0.6797 g.
What is the mass percentage of bromine in the original compound?
%

Answers

70.80 % is the mass percentage of bromine in the original compound.

Mass of AgBr = 0.6797 g

Moles of AgBr = 0.6797 g / 187.77 g/mol

= 0.0036198 mol

Silver Nitrate + Bromine --------->  Silver Bromide + Nitrate

According to reaction, 1 mole of AgBr is obtained from 1 mole of bromide ions , then 0.0036198 moles of AgBr will be formed from :

1/1 * 0.0036198  mol = 0.0036198 mole of bromide ions

Mass of 0.0036198 moles of bromide ions :

0.0036198 moles * 79.09 g/ mol

= 0.2862 g

Mass of the sample = 0.4042 g

Mass percentage = 0.2862 * 100 / 0.4041

Mass percentage (%) = 70.80 %

Hence, the mass percentage of bromine in the original compound is 70.80%

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10) A graduated cylinder has a mass of 50 g when empty. When 30 mL of water is added, the graduated
cylinder has a mass of 120 g. If a rock is added to the graduated cylinder, the water level rises to 75
mL and the total mass is now 250 g. What is the density of the rock?
M=
V=
D=

Answers

The rock would weigh 2.89 grams per milliliter.

It is the mass of anything or body per unit volume of that specific object or body.

Equals volume / mass

A graduated cylinder has a mass of 50g when empty, as stated in the problem. The graduated cylinder has a mass of 120g after 30 mL of water have been added.

The rock weighs 250 grams, or 130 grams.

the rock's volume is equal to 75 milliliters minus 30 milliliters, or 45 milliliters.

Mass of the rock divided by volume equals 2.89 grams per milliliter, which is the density of the rock.

As a result, the rock has a density of 2.89 grams per milliliter.

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who said electrons move around the nucleus billions of times in one second

Answers

Answer:

it's Heisenberg Einstein

Explanation:

Heisenberg Einstein & other scientists

Electrons move around the nucleus billions of times in one second. There are small, negatively charged particles inside an atom called electrons. “Atomos” means “not to be cut,” which refers to the smallest piece of matter.

Answer:

Heisenberg Einstein

Explanation:

they where the main one but there where a few others who agreed

What is the overall chargeon particles with the subatomic makeups given if there are3 protons, 3 neutrons, and 2 electrons?

Answers

Answer:

+1

Explanation:

The neutrons do not affect the overall charge of the particle. Protons have a positive charge and electrons have a negative charge. Since the protons outnumber the electrons by one, there is an overall charge of +1.

Here is a more in depth explanation: if there are 3 protons, each which have a value of +1, the protons contribute a +3 charge. If there are 2 electrons, each which have a value of -1, the electrons contribute a -2 charge. When you add these two charges, you are left with an overall charge of +1 (+3 + (-2) = +1).

Using the two amino acids alanine and glycine, show a dehydration synthesis reaction forming a dipeptide. Draw the dipeptide of two amino acids joined together by a peptide bond. Label the peptide bond with an arrow. The position of the peptide bond is also the place in the molecule where a water molecule was removed and the two amino acids were joined by a dehydration synthesis reaction (also sometimes referred to as a condensation reaction).

Answers

A protein is composed of a combination of amino acids.

What is a peptide bond?

A protein is composed of a combination of amino acids. The amino acids join together in a peptide bond. A number of peptide bonds give polypeptides which are the building blocks for proteins.

Now, we can see from the image that the polypeptide bond occurs between the carboxylic group of the glycine and the amine group of the alanine.

This leads to a loss of water molecule and a subsequent formation of the amide bond by condensation.

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A pediatric patient with a body mass of 75 pounds is prescribed Rohypnol for arrhythmia. The recommended dose is 3 mg per kilogram per day given in divided doses every six hours how many milligrams of propanol should be given for each dose

Answers

The  milligrams of propanol should be given for each dose is 101.25 mg.

How much should be given for each dose?

We know that drug is a chemical that is taken into the body to achieve a particular end which is to stop sickness. The amount at which drug should be given is called the dose of the drug.

The mass of the patient is 75 pounds we have to convert this weight to kilograms.

1 pound = 0.45 Kg

75 pounds = 75 pounds * 0.45 Kg/1 pound

= 33.75 Kg

If the dose is 3 mg per kilogram then;

3 mg should be given for 1 kilogram of body mass

x mg should be given for 33.75 Kg of body mass

x = 3 mg  * 33.75 Kg / 1 kilogram

= 101.25 mg

Hence, milligrams of propanol should be given for each dose is 101.25 mg.

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Rene grew bacteria from mouth on special plates in the lab she placed drops of different mouthwashs on bacteria on each plate

Answers

The correct answer is Test the hypothesis with an experiment.

Rene grew bacteria from mouth on special plates and now she is conducting a research on those bacterias by dropping different mouthwash on them to find out effect of mouthwashes on bacteria. This comes under the category of test the hypothesis with an experiment. When performing experiments and investigating observations, the scientific method is a technique that is used.This method's objective is to identify the connections between cause and effect in diverse contexts and applications.There are total seven steps of scientific method:Ask the questionPerform research Establish your hypothesisTest your hypothesis by conducting experimentMake an observation Analyse the result and draw the conclusionPresent the findings

The key goal of 4th step is to gather information and facts to test our idea.

Therefore, Rene is on the 4th step of scientific method.

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If the bond length in a XY molecule is 212,
what will be the covalent radius of atom X, if
the covalent radius of Y atom is 93.
O
119
2.27
128
3

Answers

Answer:

The correct answer is 119.

Explanation:

We are given the bond length of XY is 212.

The covalent radius of Y = 93.

Now this means that the bond length(R) is sum of the radio of X and Y Atom.

So, R(XY)=r(X)+r(Y)

212 = r(X)+93

r(X)= 119.

Therefore, the covalent radius of X is 119.

I hope this helps, have a good day! :D

Bond length is the distance between two bonded atoms. The covalent radius of X in XY molecule with bond length 212 and Y with a covalent radius of 93, is 119.

What is covalent radius?

Covalent radius is the measure of the atomic size bonded with another atom through covalent bond. Covalent bonds are formed between non-metals with comparable electronegativities.

Bond length of molecule is the distance between the two bonded atom. Mathematically bond length of a covalent compound is the sum of covalent radius of the two bonded atoms.

The bond length of the molecule XY is given as 212 and the covalent radius of Y atom is 93. The bond length 212 is the sum of covalent radius of Y and covalent radius of X.

Covalent radius of X =  212 - 93 = 119.

Therefore, covalent radius of X atom in the XY molecule with bond length 212 and Y atom with covalent radius of 93 is 119 thus, option a is correct.

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Tell how many protons, neutrons, and electrons 39_K 1_H contains ?

Answers

19 protons, 20 neutrons and 18 electrons.

Every atom has a proton, a subatomic particle, in its nucleus. The particle is electrically charged positively.Except for basic hydrogen, every atom's nucleus contains a neutron, a subatomic particle.A negatively charged subatomic particle known as an electron can either be free or attached to an atom.

The protons are determined by the atomic number (19).

therefore, number of proton = 19

The protons and neutrons together make up the atomic mass.

P + N = 39

19 + N = 39

number of neutrons = 39 - 19 = 20

A neutral atom has an equal number of protons and electrons. The negative charge is the same as the positive charge. The number of electrons represents the negative charge. The charge of this ion is +1. Therefore, find the negative charge.

= -19 + 1 = -18

therefore, number of electrons are 18.

Thus, no. of proton = 19

no. of neutrons = 20

no. of electrons = 18

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A stone with a mass of 10 kg sits on the ground. Gravity acts on the stone at a rate of 9.8 m/s2. What is the normal force
acting on the stone, keeping it at rest? (1 point)
O 1.02 N
O 9.8 N
O 10 N
O98 N

Answers

Answer:

Fn = m x g

Fn = normal force

m = mass of the stone

g = gravitational force acting on the stone.


therefore, fn=m x g = 10kg x 9.8m/s2 = 98 kgm/s2 or 98 N. Which is the same as 098 N.

Explanation:

A stone with a mass of 10 kg sits on the ground. The normal force acting on the stone, keeping it at rest, is 98 N. The correct option is D.

What is force?

A force is a power that changes the position of an object. This results in the action or movement of any object. Force is calculated in Newton. The force can be calculated by multiplying the mass by acceleration.

Given, the mass of the stone is 10 kg

The gravitational force act at the rate of 9.8 m/s²

The formula is

Force  = mass x gravitational rate

Fn = normal force

m = mass of the stone

g = gravitational force acting on the stone

So, fn = m x g

10kg x 9.8 m/s²

98 kg m/s²or 98 N

Therefore, the normal force acting on the stone, keeping it at rest, is 98 N. The correct option is D.

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The density of air is 1.29 grams/Litre. What is the weight, in kilograms of a cubic metre (1.00 m^3) of air?

Answers

The density of air is 1.29 grams/Litre. The weight, in kilograms of a cubic meter (1.00 m^3) of air is  1.29 kg

How can you calculate the density of humid air?

Humid air's density can be calculated by treating it as a mixture of ideal gases. The vapour pressure is the partial pressure of water vapour in this case. In the temperature range of 10 °C to 50 °C, the density calculation error is less than 0.2% using this method.

given that

Density =mass/ volume

1.29grams/ liter =[tex]\frac{mass}{m^{3} }[/tex]

1 liter = 0.001 [tex]m^{3}[/tex]   and 1 kilogram = 0.001grams

0.00129 kg/[tex]m^{3}[/tex] = mass / 0.001 [tex]m^{3}[/tex]

mass =0.00129 kg/[tex]m^{3}[/tex] /0.001 [tex]m^{3}[/tex]

which means,

mass= 1.29 kg

The density of air is 1.29 grams/Litre. The weight, in kilograms of a cubic meter (1.00 m^3) of air is 1.29 kg

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Describe how you prepare 2.00L of each of the following solutions. 0.250 M NaOH from Solid NaOH​

Answers

To prepare 2.00 L of 0.250 M NaOH from solid NaOH, dissolve 20 g of NaOH in 2.00 L of water to form 0.250 M NaOH solution.

A stock solution is a solution with high concentration of any particular solute and it is used for obtaining moderate quantities of solute using small volumes.

Sodium hydroxide is a strong electrolyte with the molecular formula NaOH. Sodium hydroxide completely dissociates in aqueous solution to produce Na⁺ and OH⁻ ions. Hence, sodium hydroxide is considered to be a strong base. Sodium hydroxide, also called caustic soda, is highly hygroscopic in nature.

Firstly, we will prepare a stock solution, by placing n grams of NaOH in a liter volumetric flask. Then add 100 mL dilute water and make up the volume of solution to 1 liter.

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1. Use the following information to answer 3 questions. When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction:
2KClO3(s) → 2KCl(s)+ 3O2(g)
If 12.25g potassium chlorate decomposes, how many grams of oxygen will be release?
(A) 1.60 g (B) 3.20 g
(C) 4.80 g (D) 18.37 g

Answers

4.80 grams of oxygen will be release.

When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction:

2KClO3(s) → 2KCl(s)+ 3O2(g)

mass of potassium chlorate   = 12.25g

mole of KClO3 = 12.25/122.5 = 0.1 mol

2 mole KClO3 (consumed) = 3 mole O2 (produced)

1 mole KClO3 = 3/2 mole O2

0.1 mole KClO3 = 0.1*1.5 mole O2

                          = 0.15 mole O2

mass of O2 = 0.15 * 32 = 4.80 grams

4.80 grams of oxygen will be release.

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As wind blows up the windward side, sand grains may be picked up and blown toward the top. Then grains may drop, allowing them to slip down the leeward side. What event is this describing?

1: Desertfication

2: Deposition

3: Dune movement

4: Drought of farmlands

Answers

The event described when wind blows up the windward side, sand grains may be picked up and blown toward the top is  Dune movement.

What is Dune movement?

The sand mass of dunes can move either windward or leeward, depending on if the wind is making contact with the dune from below or above its apogee.

If wind hits from above, the sand particles move leeward; the leeward flux of sand is greater than the windward flux.

Thus, the event described when wind blows up the windward side, sand grains may be picked up and blown toward the top is  Dune movement.

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How many moles of calcium do you have if you measure out 19.13 g of calcium?

Enter your answer in decimal form with the correct number of sig figs. Use the proper abbreviation for the units.

Answers

Yeah I’m good I didn’t

Please help with this question

Answers

Answer:

You would use the meter stick on the right

Explanation:

The meter stick on the right has the little lines to see the decimal for a more accurate measure while the other you would have to guess.

Solve the following problem:
How many seconds are in 3 years?
Please show your work. You will need to include the following conversion factors:
• 365 days/1 yr or 1 yr/365 days
1 day/24 hours or 24 hours/1 day
.60 min/1 hour or 1 hour/60 min
. 1 min/60 sec or 60 sec/1 min

Answers

Answer: 94,608,000 seconds

Explanation:

365 days/1 yr=365

24 hours/1 day=24

60 min/1 hour=60

60 sec/1 min=60

365*24*60*60=

8760*3600=31536000 seconds in 1 year.

31536000*3=94608000 seconds

It cost $35.57 to drive the school bus for 94.00 miles.

Given:

Distance to drive (D) = 94.00 miles

Miles per gallon (MPG) = 6.500 miles/gallon

Cost of gas (C) = $2.459/gallon

Step 1: Calculate the amount of gas required for the trip.

Gas consumed = Distance / Miles per gallon

                          = 94.00 miles / 6.500 miles/gallon

                          = 14.4615 gallons

Step 2: Calculate the cost of gas for the trip.

Cost of gas = Gas consumed * Cost per gallon

                    = 14.4615 gallons * $2.459/gallon

                    = $35.57

Therefore, it will cost $35.57.

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Can you please help me

Answers

Answer: true

Explanation:

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