Two magnets push away from
each other and do not attract.
What do we know to be true and
what type of force is being
demonstrated?

write 2 or more sentences

Answer:

B

Explanation:

Cause metamorphic rock is formed by heat pressure overtime

The rock collected by Roger if it is metamorphic rock it is formed by pressure and heat over time. Hence, image image B represents a metamorphic rock.

Metamorphic rocks have undergone significant alteration from their igneous, sedimentary, or previous metamorphic forms. When rocks are exposed to extreme temperatures, high pressures, hot mineral-rich fluids, or, more frequently, some combination of these conditions, metamorphic rocks are created.

These kinds of conditions can be found deep inside the Earth or where tectonic plates collide. The process of metamorphism changes the rocks into denser, more compact rocks rather than melting them.

Either by the rearranging of mineral constituents or through chemical reactions with fluids that enter the rocks, new minerals are produced. Even rocks that have already undergone metamorphosis might undergo changes due to pressure or temperature. Many metamorphic rocks are bent, smeared out, and compressed.

Therefore, option B is correct.

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Television technology has evolved from the process of analogue to the process of digital signal transmission.

We know that technology has to do with the correct application of the scientific knowledge so as to solve practical problems. The chemical engineer is ultimately involved in the process of problem solving the society.

The television technology has evolved from the analogue transmission of the signals when I was a child to the digital transmission of signals thus most of the television stations now do digital transmission.

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Answer:

boron

Explanation:

Boron and aluminum lie in same group in modern periodic table and both have three valence electrons

Answer:

So I don't know what do you mean by that, please be a little specific.

Explanation:

^^

Rank from highest to lowest boiling point:

Hydrocarbons can be classified into several categories based on their molecular structure, including alkanes, alkenes, alkynes, and aromatic compounds. Alkanes are simple hydrocarbons with single bonds between all carbon atoms, alkenes contain at least one carbon-carbon double bond, alkynes contain at least one carbon-carbon triple bond, and aromatic compounds contain a ring of alternating single and double bonds known as an aromatic ring.

Rank from highest to lowest boiling point:

Paraffin, C25H52

Hexadecane, C16H34

2,2,4-trimethylpentane, C8H18

Octane, C8H18

Propane, C2H8

They form the building blocks of many other organic compounds and play a crucial role in many natural and industrial processes.

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This indicates that Nitrous acid will dissolve to a larger amount than HF, with HF having a stronger tendency to stay an undissociated acid in solution.

An iron binder called nitrous acid is used to treat potentially fatal acute cyanide poisoning. To treat cyanide poisoning, sodium thiosulfate is combined intravenously with nitrous acid (or sodium nitrite).

Two ions make up the specified acidity Effective immediately H N O 2. The first is an H+ ion, while the second is a NO2 N O 2 ion. Nitrite ion is the term given to the NO2 N O 2 ion. As a result, the supplied acid will be given the name nitric acid in accordance with the guidelines for acid naming.

Comparing the K values given, we see that HF has a K value of \(6.6 * 10^{-4}\) and Nitrous acid has a K value of \(7.2 *10^{-4}\). Since HF has the smaller K value, it is the weaker acid of the two.

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Future greater fires can be avoided by putting out ground fires, which are those that burn beneath the surface.

The correct answer is C

A ground fire is a particular kind of wildfire that starts underground when fuels like peat, coal, tree roots, or other buried organic debris catch fire and burn. Ground fires may end up burning through the ground's surface and turn into surface fires, depending on the circumstances of the fire.

Plant roots as well as other organic material ignited beneath the soil surface cause ground fires. Surface fires, which burn old or dried vegetation that is laying or growing slightly above the ground, might develop from these fires. On the contrary hand, crown fires consume the tree canopy.

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Answer:

A

Explanation:

good luck

Answer:

A

help u and it's A

Explanation:

A substance that is present in a gaseous state at room temperature would be between groups 13 to 18 on the periodic table because it is a non-metal. Option 4.

Gaseous elements are elements that are in gaseous states at room temperature. They are usually found concentrated in the upper right corner on the right side of the periodic table.

Some of the gaseous elements include elements in group 18 which are collectively known as the noble gases, nitrogen in group 15, oxygen in group 16, and so on.

Even though some elements that exist as gases at room temperature can be found in other groups outside of groups 13 to 18, gaseous elements are concentrated between the referenced groups.

In other words, a substance that is present in the gaseous state at room temperature will most likely be between groups 13 to 18 of the period table.

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Answer:

The structure that is located between the auricle and the eardrum is the ear canal.

Explanation:

The ear canal, or external ear canal, is a a tubular hole about 30 mm long that runs from the auricle to the eardrum, forming part of the external ear.

Its function is to conduct sound, in the form of vibrations, from the outside to the eardrum. It also has the function of producing a viscous secretion called cerumen, capable of trapping dust particles and small foreign bodies.

Other options are not correct because:

Answer:

ear canal

Explanation:

Answer: Option (A) is the correct answer.

Explanation:

When there occurs no change in the chemical composition of a substance then it is known as physical property.

For example, mass, volume, density are all physical properties.

Since, the mass of an electron is negligible and an electron holds a negative charge.

Therefore, negatively charged particle with very little mass accurately describes the physical properties of electrons in atoms.

The electron affinity is the energy required to remove an electron from an atom to yield a negative ion.

We know that atomic size increases down the group as more shells are added. This is because, inter-electronic repulsion pushes the electrons in the outermost shell farther away from the nucleus. Hence potassium atom has a larger atomic radius than a sodium atom because It has more energy levels occupied by electrons.

Electron affinity increases across the period. The more nonmetallic an element is, the more negative its electron affinity. Hence, sulfur has the greatest electron affinity.

Electron affinity is the opposite of ionization energy. It therefore follows that, the electron affinity of fluorine is essentially equal to the negative of the ionization energy F.

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The pH of a 0.10m solution of hb will be 1.80.

To solve this problem, we need to use the acid dissociation constant (Ka) of HB, which is the conjugate acid of the base B-. We can calculate Ka using the given pKa value, which is the negative logarithm of Ka.

pKa = -log(Ka)

10^-pKa = Ka

Let's assume that the reaction for the dissociation of HB is:

HB + H2O ⇌ B- + H3O+

The Ka expression for this reaction is:

Ka = [B-][H3O+] / [HB]

We can rearrange this expression to solve for [H3O+]:

[H3O+] = Ka * [HB] / [B-]

We know that [B-] = [OH-] = 10^-(pH) = 10^-9 (since the pH of the 0.050 M NaB solution is 9.00). We also know that [HB] = 0.010 M (since the concentration of the 0.010 M HB solution is given).

Finally, we need to calculate Ka using the given pKa value.

pKa = 4.76

Ka = 10^-pKa = 1.58 x 10^-5

Plugging in the values, we get:

[H3O+] = (1.58 x 10^-5) * (0.010 M) / (10^-9)

           = 0.0158 M

Therefore, the pH of the 0.010 M solution of HB is:

pH = -log[H3O+] = -log(0.0158)

     = 1.80

Hence, pH of solution is 1.80

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Answer: The answer is A heat and pressure

Explanation:

Get ready, you should catch it.

Answer:

As an object falls, its gravitational potential energy decreases as its speed—and therefore its kinetic energy—increases.

Explanation:

Study Island

There are three ways nitrogen can be fixed to be useful for living things: Biologically: Nitrogen gas (N2) diffuses into the soil from the atmosphere, and species of bacteria convert this nitrogen to ammonium ions (NH4+), which can be used by plants.

Hope this helps!

Answer:

Many human activities have a significant impact on the nitrogen cycle. Burning fossil fuels, application of nitrogen-based fertilizers, and other activities can dramatically increase the amount of biologically available nitrogen in an ecosystem.

Explanation:

Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.

The equilibrium concentration of NOF is 0.067 M.

To determine the equilibrium concentration of NOF, we need to use the equilibrium constant (Kc) and the initial concentrations of the reactants. The equilibrium constant expression for the given reaction is:

Kc = [NOF]² / ([NO]² * [F₂])

Given that Kc = 7.2 × 10⁻⁴ and the initial concentrations of NO and F₂ are both 0.92 M, we can substitute these values into the equilibrium constant expression:

7.2 × 10⁻⁴ = [NOF]² / (0.92)²

Rearranging the equation and solving for [NOF], we get:

[NOF]² = 7.2 × 10⁻⁴ * (0.92)²

[NOF]² = 6.386 × 10⁻⁴

[NOF] = √(6.386 × 10⁻⁴)

[NOF] ≈ 0.067 M

Therefore, the equilibrium concentration of NOF is approximately 0.067 M when the reaction starts with initial concentrations of 0.92 M for both NO and F₂.

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Answer:

B. Food can be produced in larger amounts for more people to eat.

Explanation:

Commercial farming mechanizes operations controls diseases and pests, enabling farms to produce more

Answer:

food can be produced in larger amounts for more people to eat.

Explanation:

you're welcome

Answer:

box A

Explanation:

10 is bigger than 3 since 10 is bigger it has more force in it

These amino acids make it possible for an enzyme's active site to specifically bind to its substrate or substrates and facilitate chemical reactions.

A protein is made up of a lengthy chain of amino acids that are connected by peptide bonds. A water molecule is removed during a biological process that links the carboxyl group of one amino acid to the amino group of a nearby amino acid to generate peptide bonds.

Substances (such as ions, glucose, and amino acids) move across a membrane during active transport from an area of lower concentration to a region of higher concentration. They travel in the opposite direction of their concentration gradient as a result.

With the aid of symporter proteins found in the plasma membrane, amino acids are diffused across the membrane by facilitated diffusion. Sodium-dependent amino acid transporters is another name for them.

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The molar mass of ethanol is 46.069 g/mol because it has 2 mol of carbon atoms (2 12.011 g), 6 mol of hydrogen atoms (6 1.0079 g), and 1 mol of oxygen atoms (1 15.9994 g) in 1 mol.

Ethanol has a molar mass of 46 gmol-1.

Because you already know, molar mass refers to the entire mass of one molecule of a certain substance, and the basic chemical formula of ethanol is C2H5OH. So, if there are numerous atoms in a compound, we may calculate its molar mass by adding up the masses of its constituent atoms and multiplying the result by the number of atoms. We may calculate the molar mass of ethanol as 2x(molar mass of carbon) + 6x(molar mass of hydrogen) + 1x(molar mass of oxygen), or 2x12 + 6x1 + 1x16 = 24 + 16 + 6 = 46, since ethanol contains two carbon atoms, six hydrogen atoms, and one oxygen atom.

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Por definición de enlace iónico, covalente y regla del octeto, la relación existente entre la teoría del octeto de Lewis con los enlaces iónicos y  covalentes es que dichos enlaces se producen con el objetivo de completar la última capa de electrones y adquirir estabilidad.

Por un lado, se produce un enlace iónico entre átomos metálicos y no metálicos, donde los electrones se transfieren completamente de un átomo a otro. Durante este proceso, un átomo pierde electrones y otro los gana, formando iones. Por lo general, el metal cede sus electrones formando un catión al elemento no metálico, que forma un anión.

Por otro lado, el enlace covalente es el enlace químico entre átomos donde los electrones se comparten, formando una molécula. Se establecen enlaces covalentes entre elementos no metálicos. El par de electrones compartidos es común a los dos átomos y los mantiene unidos.

En ambos casos se cumple con la regla del octeto, que establece que los átomos de los elementos se enlazan unos a otros en el intento de completar su capa de valencia con ocho electrones. Es decir que los átomos van a tender a ceder o compartir electrones para completar ocho electrones en la capa de valencia mediante un enlace iónico, covalente o metálico.

En otras palabras, el objetivo es tener la configuración electrónica del gas noble más cercano, teniendo así la última capa de electrones completa y adquiriendo estabilidad.

En resumen, la relación existente entre la teoría del octeto de Lewis con los enlaces iónicos y  covalentes es que dichos enlaces se producen con el objetivo de completar la última capa de electrones y adquirir estabilidad.

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Jill needs to deposit $14,310.09 today to meet her goal of having $40,000 available for her daughter's college needs at age 18.

To determine the amount Jill needs to deposit today in order to fund her daughter's college needs, we can follow a three-step calculation process.

First, we need to calculate the future value of $10,000 per year at an after-tax return of 8% over the 16-year period (from age 2 to 18). Considering an inflation rate of 3%, we can adjust the future value for the erosion of purchasing power.

Using the future value of an ordinary annuity formula, we find that the accumulated value at age 18 would be approximately $236,852.46.

Next, we need to find the present value of this future amount by discounting it back to the present day.

Using the present value of an ordinary annuity formula with an 8% discount rate, we find that Jill needs to deposit $18,519.87 today to achieve her goal of $40,000 available ($10,000 per year) when her daughter turns 18.

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the answer is venus.

Answer: D

Explanation:

Anemometer is used to measure wind speed, while a wind vane (also known as a weather vane) is used to measure wind direction. The correct answer is: Anemometer and wind vane.

Anemometer: An anemometer is a weather instrument specifically designed to measure wind speed. It typically consists of three or four cups mounted on horizontal arms that rotate freely in the wind. As the wind blows, the cups start rotating. The speed of rotation is directly proportional to the wind speed. The anemometer is calibrated to provide an accurate measurement of the wind speed in units like meters per second (m/s) or miles per hour (mph).

Wind Vane (Weather Vane): A wind vane is a device used to measure wind direction. It typically has an arrow or pointer attached to a vertical axis. The vane is mounted in such a way that it can freely rotate horizontally. When the wind blows, it causes the wind vane to align itself with the wind direction. The direction in which the vane points indicates the wind direction. Wind vanes are often marked with cardinal directions (north, south, east, west) and sometimes additional intermediate directions (northeast, southeast, southwest, northwest) to provide a more precise indication of the wind direction.

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