A set of headphones produces sounds that cancel out sound waves from the

environment. Which wave interaction enables these headphones to work?

A. Constructive interference

B. Absorption

C. Destructive interference

D. Reflection

Water, a naturally occurring and vital component for life on Earth, is really known chemically as dihydrogen monoxide (DHMO). When consumed in moderation, it is not dangerous.

The claim you made appears to be a well-known internet hoax that has been circulated for a while. It is frequently used in jokes and satire to highlight how quickly false information and fear-mongering can spread.

It is crucial to rely on reliable sources and scientific facts when analyzing information, especially when it comes to health and safety, to address your concern. To assist people in recognizing and avoiding misleading or inaccurate information, it is also crucial to encourage critical thinking and media literacy.

In other words, since dihydrogen monoxide is a fundamental substance required for existence, there is nothing to "repair" in regard to it. Instead, in order to assure accurate and trustworthy knowledge, we should concentrate on information verification and the advancement of scientific literacy.

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Answer:

Consider how the speaker begins the speech, the support given in the body of the speech, and how the speaker concludes. Listen for changes in tone. Listen for how the speaker uses delivery techniques such as pauses, pace, voice, metaphors and symbolism, repetition and parallelism, and vocabulary.

Explanation:

Answer:

A neon lamp was switched on during the Great Depression and continued to burn until it was discovered some 77 years later. The electricity bill came up to a whopping $17 000!

Explanation:

Answer:

it would be C

Explanation:

Answer: C

Explanation:

both numbers have 2 S.F. so the answer should have 2 too.

Using MO theory, we predict that 1 and 3 (CN and CN2) are diamagnetic, while 2 (CN+) is paramagnetic. Therefore, the correct answer is a. 1 and 3 only.

Using MO theory, we can predict the magnetic properties of molecules based on the electron configuration of their molecular orbitals. Diamagnetic species have all of their electrons paired, while paramagnetic species have unpaired electrons.
For CN, we can draw the MO diagram by combining the atomic orbitals of carbon and nitrogen. The diagram shows that CN has 10 electrons in its molecular orbitals, with all of them paired. Therefore, CN is diamagnetic.
For CN+, we can remove one electron from CN and recalculate the MO diagram. The resulting diagram shows that CN+ has 9 electrons, with one unpaired electron in the highest energy molecular orbital. Therefore, CN+ is paramagnetic.
For CN2, we can combine two CN molecules and draw the MO diagram. The diagram shows that CN2 has 20 electrons in its molecular orbitals, with all of them paired. Therefore, CN2 is also diamagnetic.

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This is an example of elimination reaction which is resulting in the formation of 1-butene.

A sort of chemical process called an elimination reaction involves the removal of a number of atoms from a molecule, usually in pairs or groups. The elimination typically occurs as a result of the activity of metals, acids, and bases. The procedure of heating at elevated temps can also cause it.
The kind of atoms or clusters of atoms that are expelled from the molecule is a typical way to identify elimination processes. Dehydrohalogenation, for instance, is the elimination of a hydrogen atom and a halogen atom; dehalogenation is the reaction's name when both departing atoms are halogens.

Methoxide will deprotonate the butane 1-methyl group, forming a carbon-carbon double bond in the second position and rupturing the carbon-bromine bond all at once.
As a consequence, 1-butene is produced.
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tret-hexyl alcohol

Explanation:

its formula is CH3-CH3-CH2-CH2-CH-CH2

Answer: Malleability

Explanation: cuz ... its right ... lol

The mass of water H₂O that would be produced from the reaction is 43.2 g

The number of mole can be obtained as by using the ideal gas equation as illustrated below:

n = PV / RT

n = (1.3 × 20) / (0.0821 × 263)

n = 1.2 mole

Balanced equation

2H₂ + O₂ → 2H₂O

From the balanced equation above,

1 mole of O₂ reacted to produce 2 moles of H₂O.

Therefore,

1.2 mole of O₂ will react to produce = 1.2 × 2 = 2.4 moles of H₂O

Mass = mole × molar mass

Mass of H₂O = 2.4 × 18

Mass of H₂O = 43.2 g

Thus, 43.2 g of water were produced from the reaction.

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Answer:

15.6g ofH2O

Explanation:

The reverse complement of the sequence 5' ACATG 3' is

T CATG. Therefore,

the correct option is E. None of the above.

3. The pattern of potential interactions at the edge of which Watson-Crick base pair is H-bond acceptor, H-bond donor, H-bond acceptor, methyl group.The pattern of potential interactions at the edge of the Watson-Crick base pair where H-bond acceptor, H-bond donor, H-bond acceptor, methyl group is located is

T-A.4.

What is the reverse complement of the sequence 5’ ACATG 3’.

The reverse complement of the sequence 5' ACATG 3' is

T CATG.

Therefore, the correct option is E. None of the above.

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Answer:

2

Explanation:

Engineers in Russia invented a new way to create colorful art with constructive laser art.

Modern industrial life and urban space were intended to be reflected in constructivist art. It produces art using industrial manufacturing techniques and inexpensive materials.

The idea behind constructivism was to replace conventional art by emphasizing engineering rather than painting. Russia started a colorful way to create new art.

Thus, Russian engineers developed a fresh method for producing vivid artwork using constructive laser art.

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The correct statement about pericyclic reactions is:

In pericyclic reactions, all bonds are broken and formed in a single step.

Pericyclic reactions are a class of organic reactions characterized by the simultaneous breaking and forming of multiple bonds in a concerted manner, meaning that all bond changes occur in a single step. This is in contrast to stepwise reactions where bonds are broken and formed in separate steps.

In a pericyclic reaction, the reactants rearrange their electrons in a concerted fashion, leading to the formation of new bonds and the breaking of existing bonds. This concerted process occurs through the overlap of molecular orbitals, allowing for the efficient transfer of electrons.

Pericyclic reactions are concerted reactions in which the breaking and forming of bonds occur simultaneously in a single step. They do not involve multiple steps or intermediates. The transition state in a pericyclic reaction is cyclic, not acyclic.

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A flat, triangular twinned diamond crystal is called a macled diamond. It is a type of diamond crystal that has two triangular faces that intersect in a V-shape.

The two faces are mirror images of each other, and they are joined at their vertices. This type of diamond is quite rare, as it occurs when two separate diamond crystals grow in the same crystal lattice and become interlocked. The resulting diamond has two distinct faces, as well as a unique set of physical properties. It often has an interesting pattern of inclusions, which can make it harder to cut and polish. Macled diamonds are prized for their beauty and rarity, and are highly sought after by collectors.

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Answer:

4 atoms of oxygen

Explanation:

2 atoms of oxygen gas O2

Answer:

4 atoms of oxygen

Explanation:

The given chemical formula is:

             2CO₂

Unknown is the number of atoms;

  There are :

C : 2 atoms of carbon

O: (2 x 2) atoms of oxygen in the given molecule

      4 atoms of oxygen

The equilibrium constant of the system is 11.3.

We know that the equilibrium constant shows the extent to which reactants are converted into products.

Now;

2NO2 ⇄ N2O4

[NO2] = 0.500 mol /1 L =  0.500 M

[N2O4] =  0.186 mol  /1 L =  0.186 M

The ICE table is;

          2NO2 ⇄ N2O4

I           0.5           0

C         -2x              +x

E          0.5 - 2x     0.186

The concentration of NO2 at equilibrium = 0.5 - 2(0.186) = 0.128

Keq =  0.186/( 0.128)^2

Keq = 11.3

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A chemical reaction rate can be increased by either increasing the temperature or decreasing the activation energy.

The rate of a chemical reaction is influenced by several factors, including temperature and activation energy.

1. Increasing the temperature: When the temperature is increased, the average kinetic energy of the reactant molecules also increases. This results in more frequent and energetic collisions between the reactant molecules, leading to a higher probability of successful collisions and increased reaction rate. Additionally, an increase in temperature can provide the reactant molecules with sufficient energy to overcome the activation energy barrier.

2. Decreasing the activation energy: Activation energy is the minimum energy required for a reaction to occur. By decreasing the activation energy, either through the use of a catalyst or by adjusting the reaction conditions, the barrier for the reaction to proceed is lowered. This allows a larger fraction of the reactant molecules to possess the necessary energy to overcome the reduced activation energy, resulting in an increased reaction rate.

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Answer:

molecules gain energ and start to move quickly

Water has highest density at 4∘C. This changes its properties from other simple fluids. When water is heated from 0∘C to 4∘C, the volume of liquid decreases. Thus for this transition, P ΔV is negative.

Answer:

I would choose pear fruits are a good source of carbohydrates hopefully its right sorry if its not

Answer: Fruit

Fruits have a lot of carbohydrates in them :) Hope this helped!

Answer:

Fundamental force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, electromagnetic, strong, and weak—that govern how objects or particles interact and how certain particles decay.

% composition = Ar/Mr x 100%

MM (molar mass) ZnSO₄ = 161 g/mol

AM (atomic mass) Zn = 65.38 g/mol

% Zn = 65.38/161 x 100% = 40.6%

AM (atomic mass) S = 32 g/mol

% Zn = 32/161 x 100% = 19.9%

AM (atomic mass) O = 16 g/mol

% Zn = 4.16/161 x 100% = 39.6%

Explanation:

Opposite hemispheres have opposite seasons, no matter the earth's rotation, because of the earth's tilt. The earth's tilt is responsible for all seasons.

Answer:

a. The limiting reagent is NO2.

b. 126g of nitric acid can be produced.

Explanation:

1st) It is necessary to write the balanced equation:

From the balanced equation we know that 3 moles of NO2 (3x46g= 138g) react with 1 mol of water (18g/mol) to produce 2 moles of nitric acid (2x63g= 126g) and 1 mol of NO (30g/mol).

2nd) To calculate the limiting reagent it is necessary to use the given values and the stoichiometry of the balanced equation:

The 10.0g of NO2 will need 1.30g of H2O to react.

The 30.0g of H2O will need 230g of NO2 to react.

So, as we only have 10.0g of NO2 and 30.0g of H2O, the limiting reagent will be NO2.

3rd) Now, to calculate the theorical yield, we need to use the stoichiometry of the balanced equation using the limiting reagent:

1 mol of H2O produces 2 moles of nitric acid. With the molar mass of nitric acid (63g/mol), we can calculate the grams.

Finally, 126g of nitric acid will be produced if the reaction is 100% efficient (theoretical yield).

Answer:

work lost due to friction​

Explanation:

The work output of any real machine is usually less than the work needed to operate the machine due to the fact that some input work is lost due to friction.

Frictional forces are those forces that oppose the motion of 2 surfaces sliding against each other and this is one of the reasons machines do not work at 100% efficiency. When the opposition happens, some of the input work is converted to heat.

Answer:

work lost due to friction

Explanation:

simple and short

brainliest

i know its been like 2-3 years but like ....

lol

The heat absorbed by 47.5g of silver (Ag) when the temperature rises by 10 °C is 111.625 J .

Specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree.

The units of specific heat are usually calories or joules per gram per Celsius degree.

The equation used to solve for specific heat capacity is this:

q = mcΔT

where q heat absorbed or lost,

c is the specific heat capacity,

m is the mass, and

ΔT is the change in temperature

= final temperature− initial temperature

Given that m = 47.5g

ΔT = 10 K

Specific Heat of silver = 0.235 J/gK

Therefore

q = 47.5 * 0.235 * 10

q= 111.625 J

Therefore the heat absorbed by 47.5g of silver (Ag) when the temperature rises by 10 °C is 111.625 J .

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