If a material has a tensile modulus of elasticity of 114 gpa and a poisson's ratio of 0.33, what is its modulus of elasticity in shear? (20 points)

Answer:

a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.

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Answer:

Empirical formulas show the simplest whole-number ratio of atoms in a compound

Explanation:

The option (1) water supply i.e. the biotic factor that affect the human most.

An ecosystem's overall health is also influenced by biotic factors such as the diversity of consumers and the presence of autotrophs, or self-sustaining organisms like plants. Abiotic variables have an impact on an organism's capacity for survival and reproduction. Abiotic barriers prevent the formation of population .

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Answer:

Mark me as Brainliest please

Explanation:

Compression vs Tension

Tension and compression are two concepts discussed in physics. Tension is a force, while compression is a phenomenon. Both these concepts play important parts in fields such as mechanical systems, automobile engineering, heat engines, material science, pendulums and various other fields. It is vital to have a proper understanding in tension and compression in order to excel in such fields. In this article, we are going to discuss what compression and tension are, their definitions, applications of compression and tension, the similarities between compression and tension and finally, the difference between compression and tension.

Answer:

\({ \rm{2H {}^{ + } _{(aq)} + CO {}^{2 - } _{3(aq)} \: \: \: {}^{ { \huge{\dashrightarrow} }} _{ \huge{ \dashleftarrow}} }} \: \: { \rm{H _{2} CO _{3(aq)} }}\)

Answer: The number of atoms = Avogadro's number = 6.022 × 10²³

Number of atoms in a mole = Avogadro's number = 6.022 × 10²³

Explanation:

1.

Mole = \(\frac{given mass}{molar mass}\)

Also, Mole = \(\frac{Number of atoms/molecules/ions}{Avagadro's Number}\)

∴  \(\frac{given mass}{molar mass}\)  = \(\frac{Number of atoms/molecules/ions}{Avagadro's Number}\)

\(\frac{12}{12}\) = \(\frac{number of atoms}{Avogadro's number}\)

number of atoms = Avogadro's number

number of atoms = 6.022 × 10²³

2.

Mole = \(\frac{Number of atoms/molecules/ions}{Avagadro's Number}\)

1 =  \(\frac{Number of atoms/molecules/ions}{Avagadro's Number}\)

number of atoms = Avogadro's number

number of atoms = 6.022 × 10²³

Explanation:

Density = mass/volume

.: volume = mass/density

Volume = 77/3.5

Volume = 22cm³

Answer:

D

Explanation:

Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes!!!

Answer:

oxygen? but that's not a compound that's an element

Answer:

A. They are in the nucleus and never leave.

Explanation:

Protons as well as neutrons are located in the nucleus of the atom.

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Answer:

siren wavelength of 0.0068 meters, frequency you hear = less than 5000 Hz

Explanation:

Q.A police siren passes you with a frequency of 5000 Hz. Which correctly describes the sound wave after the police car passes you? The speed of sound is 340 m/s.

(a) siren wavelength of 0.0068 meters, frequency you hear = less than 5000 Hz

(using doppler's effect)

Doppler effect is the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by the relative motion of the observer and the wave source.

Christian Johann Doppler, an Austrian mathematician, and physicist discovered the Doppler effect in 1842.

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The evidence that indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier: Whole logs mixed in with the rocks, Clay-sized particles and An abundance of snow and ice

The following evidence indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier:

Whole logs mixed in with the rocks: The presence of whole logs mixed in with the rocks suggests a rapid and powerful flow, characteristic of a lahar, rather than the slow movement associated with glaciers.

Clay-sized particles: The presence of clay-sized particles is often associated with lahars, as they can be easily transported by the flowing volcanic material.

An abundance of snow and ice: The presence of snow and ice is indicative of a recent event, as glaciers tend to accumulate and retain snow and ice over time. In the case of a lahar, the presence of snow and ice suggests a more recent deposition.

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Atoms and molecules are the fundamental building blocks of all materials, and they are always in motion due to their kinetic energy.

Kinetic energy is a type of energy that is associated with the motion of an object. It is the energy of a moving object, or the energy that an object possesses due to its motion. Kinetic energy can be calculated by multiplying half of an object’s mass by its velocity squared.

This kinetic energy is the energy carried by an electric current, which is created when the atoms and molecules move and interact with each other. This kinetic energy is the source of many of the properties of materials, such as conductivity and elasticity.

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Answer:

Ocean

Explanation:

The compound most soluble in pentane among the options provided is B. Benzene.

Pentane is a nonpolar solvent, meaning it lacks a significant dipole moment and does not have any charges separated within the molecule. On the other hand, benzene is also a nonpolar compound. Benzene consists of a hexagonal ring of carbon atoms with alternating double bonds, resulting in a planar, symmetrical structure.

Pentane is a nonpolar solvent, and benzene is also a nonpolar compound. Nonpolar compounds tend to dissolve well in nonpolar solvents like pentane. Pentanol (A), acetic acid (C), and ethyl methyl ketone (D) are polar compounds and are not expected to be soluble in pentane. Therefore, the correct answer is B. Benzene.

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Here, 3x10^23 molecules of water are equal to 0.5 moles of water.

There are many ways to find the number of moles of a compound, but to convert the number of molecules of water to moles of water, Avogadro's number needs to be known.

The formula used to find the number of moles is:

moles = (Number of molecules) / (Avogadro's number)

As Avogadro's number = 6.022 x 10^23 molecules/mole.

The given number of molecules is 3x10^23.

Putting the values in the above equation;

(3 x 10^23 molecules of water) / (6.022 x 10^23 molecules/mole) = 0.498 moles of water

Rounding off the value gives 0.5 moles of water.

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When meta-bromoaniline is treated with NaNO₂ and HCl, it produces a diazonium salt. When that diazonium salt is further treated with different reagents, we can obtain different products.

These products are:

a) When the diazonium salt is treated with water (H₂O), the product obtained is phenol. This reaction is known as hydrolysis and it occurs due to the replacement of the diazonium group by a hydroxyl group (-OH) from water.

b) When the diazonium salt is treated with hydrofluoric acid (HBF₄), the product obtained is an arenediazonium tetrafluoroborate salt. This is because, in the presence of HBF₄, the diazonium group  gets replaced by a tetrafluoroborate anion (BF₄⁻).

c) When the diazonium salt is treated with copper cyanide (CuCN), the product obtained is a copper-cyanide complex. This reaction is known as Sandmeyer's reaction, and it is used to replace the diazonium group with a cyanide anion (-CN) to form an aryl cyanide.

d) When the diazonium salt is treated with copper bromide (CuBr), the product obtained is an aryl bromide. This reaction is also known as the Gatterman reaction, and it is used to replace the diazonium group with a bromine atom (-Br) to form an aryl bromide.

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The complete question-

Give the products obtained when meta-bromoaniline is treated with NaNO₂ and HCl.

Mole fraction of dextrose = moles of dextrose / total moles of solution

Total moles of solution = moles of dextrose + moles of water

Given, moles of dextrose = 0.25 mol

Moles of water = 89.48 mol

Total moles of solution = 0.25 mol + 89.48 mol = 89.73 mol

Mole fraction of dextrose = 0.25 mol / 89.73 mol = 0.0028

Rounding to 2 significant figures, the mole fraction of dextrose in the solution is 0.0028.

The number of coulombs of charge transferred is 32220 C

When you perform an electrochemical reaction in which 0.800 mol of Cu are reduced to solid Cu, the number of coulombs of charge transferred can be calculated using Faraday's constant. The answer is 32220 C (coulombs).Explanation:

Given: The amount of Cu reduced to solid Cu = 0.800 mol

The amount of charge transferred can be calculated using Faraday's constant.

Faraday's constant = 96500 C mol^-1

Amount of charge transferred = n x FWhere,

n = Number of moles of electrons transferred.

F = Faraday's constant.Number of moles of electrons transferred

= 2 [Since the Cu ion gains 2 electrons to form Cu]Amount of charge transferred

= 2 x 96500 C mol^-1

= 193000 C [Or 1 F = 96500 C]Amount of charge transferred when 0.800 mol of Cu is reduced to solid Cu

= 193000 x 0.800 = 154400 C or 1.54 x 10^5 C (Approximately).

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Answer:

The word "transfers" completes the sentence.

Explanation:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator.

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Answer:

The right answer is "kinetic"

Explanation:

Wind is moving, so has kinetic energy.

Answer:

metallic bonds.

Explanation:

Generally, compounds that are ductile and excellent conductor of electricity have metallic bonds between them.

These compounds are usually metals.

Step 1 - What is Enthalpy?

Enthalpy is, by definition, the heat involved in a chemical reaction. We usually represent it by the letter H.

A chemical reaction always involve heat exchanges: it may absorb heat from the surroundings or it may heat the surroundings. If a reaction absorbs heat, we call it endothermic. If it liberates heat, we call it exothermic.

To measure the heat involved in a reaction we use delta H, i.e., the variation of enthalpy:

There are two possible cases:

I) Endothermic reactions: heat is absorbed, therefore Hproducts > Hreagents, so:

II) Exothermic reactions: heat is lost, therefore Hproducts < Hreagents, so:

Step 2 - How do we measure enthalpy variation in an experimental setting?

Enthalpy variation can be measured by means of an equipment called calorimeter. Here's a picture of it:

A calorimeter has a sample chamber in which the reaction is carried on, surrounded by water. The reaction will exchange heat with the water, modifying its temperature, which can be detected by the termometer and the temperature reader.

Since heat can be related to temperature variation by the following formula:

And since, for a chemical reaction, the heat exchanged is the enthalpy, we obtain that:

Thus, by knowing the mass of water in the calorimeter (m), its specific heat (c) and the temperature variation (provided by the termometer), we are able

to calculate the enthalpy variation for any reaction (at least theoretically).

Step 3 - An example problem

The following reaction is exothermic or endothermic? Justify.

Answer: This reaction is a combustion (reaction with O2). We expect of a combustion to liberate a lot of heat (after all, we can feel it ourselves when close to a firepit, for example).

Thus, we expect it to be exothermic. Indeed, we can confirm this by its enthalpy variation: its negative. Lost was thus lost during this reaction.

The density of silver at room temperature is 10.49 g/cm3, and the density of silver at its melting point is 9.3 g/cm3 when solid silver melts, its particles 'move farther apart'

From the given data density of silver at room temperature is 10.49 g/cm3, and the density of silver at its melting point is 9.3 g/cm3 then solid melts, liquid state is obtained and intermolecular distance in liquid is more than the intermolecular distance in solid due to this, the strength of intermolecular forces of attraction decreases when silver solid melt then its particles move farther apart and that's why the solid silver which is at room temperature density is more because it is in room temperature but we melt then particles are move faster and move apart from other and density become less.

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Answer:

1.476 mol molecules

Explanation:

74.5 grams of lead (II) nitrate were reacted to produce 62.6 grams of lead (II) chloride.

To determine the mass of lead (II) nitrate that was reacted when 62.6 grams of lead (II) chloride is produced, we need to use the stoichiometry of the balanced chemical equation and calculate the molar masses of the compounds involved.

The balanced chemical equation for the reaction is:

2Pb(NO3)2 + 2NaCl → 2PbCl2 + 2NaNO3

From the equation, we can see that 2 moles of Pb(NO3)2 react to produce 2 moles of PbCl2. Therefore, the molar ratio of Pb(NO3)2 to PbCl2 is 1:1.

First, let's calculate the molar mass of PbCl2 and Pb(NO3)2:

Molar mass of PbCl2 = Atomic mass of Pb + 2 × Atomic mass of Cl

= 207.2 g/mol + 2 × 35.45 g/mol

= 278.1 g/mol

Molar mass of Pb(NO3)2 = Atomic mass of Pb + 2 × (Atomic mass of N + 3 × Atomic mass of O)

= 207.2 g/mol + 2 × (14.01 g/mol + 3 × 16.00 g/mol)

= 331.2 g/mol

Next, we can calculate the moles of PbCl2 produced:

Moles of PbCl2 = Mass of PbCl2 / Molar mass of PbCl2

= 62.6 g / 278.1 g/mol

≈ 0.225 mol

Since the molar ratio of Pb(NO3)2 to PbCl2 is 1:1, the moles of Pb(NO3)2 reacted will also be 0.225 mol.

Finally, to find the mass of Pb(NO3)2 that was reacted, we can use the moles and molar mass:

Mass of Pb(NO3)2 = Moles of Pb(NO3)2 × Molar mass of Pb(NO3)2

= 0.225 mol × 331.2 g/mol

≈ 74.5 g

Therefore, approximately 74.5 grams of lead (II) nitrate were reacted to produce 62.6 grams of lead (II) chloride.

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Answer:   This is an acid-base reaction (neutralization): Ca(OH) 2 is a base, CO 2 is an acid. ; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]

Explanation:

Answer:

-113.2 kJ/mol

Explanation:

(-1207-285.8)-(-981.1-393.5)= -133.2

(Products)-(Reactants)= Answer

you decide to test your pillbugs' preference for an acidic environment versus a nonacidic environment. on one side of the chamber you place filter paper moistened with water. Dry filter paper is appropriate to place on the other side to test this variable.

Armadillidiidae (Pillbugs) is a family of woodlice, a terrestrial crustacean group in the order Isopoda. Unlike members of some other woodlice families, members of this family can roll into a ball, an ability they share with the outwardly similar but unrelated pill millipedes and other animals. This ability gives woodlice in this family their common names of pill bugs or roly polies.Other common names include slaters, potato bugs, and doodle bugs. Most species are native to the Mediterranean Basin, while a few species have wider European distributions. The best-known species, Armadillidium vulgare, was introduced to New England in the early 19th century and has become widespread throughout North America.

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Answer:

He was the first scientist to observe and describe bacteria and protozoa by looking at a drop of water from a pound under a microscope. He also was the one to build the first compound microscope.

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