Which process is responsible for changing the composition of rock?

erosion
abrasion
chemical weathering
mechanical weathering

Dispersion types include chromatic, material, waveguide, and polarisation mode dispersion.

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Answer:

The information from Mariner 6 and Mariner 7

Explanation:

Because they had not been launched yet

Answer:

B.

Explanation:

The air molecules of warm air has higher energy. It causes them to move away from each other

C = m V . The unit of concentration is typically given as g/mL because the solute mass is frequently given in grammes and the volume is frequently given in milliliters. However, there are a tone of other mass and volume unit combinations that are possible.

Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.

A solution's concentration is an indicator of how much solute has dissolved in a specific volume of solvent or solution. When there is a significant amount of dissolved solute in a solution, it is said to be concentrated. When a dissolved solute is present in a solution, it is said to be diluted.

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The energy of this transition is equal to  4.02 x 10^-19 J.

Calculate the frequency of the light using the equation c = λν, where c is the speed of light (299,792,458 m/s), λ is the wavelength (746.4 nm), and ν is the frequency of the light.

Calculate the energy of the transition using the equation E = hν, where h is Planck's constant (6.626 x 10^-34 J*s) and ν is the frequency of the light.

Calculate the amount of energy caused by the transition by multiplying the energy of the transition by the Avogadro constant (6.022 x 10^23 s^-1).

The amount of energy caused by the transition is 4.02 x 10^-19 J.

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Answer:

0.534mg..

....

...

..

...

.

....

Answer:

x = 1/100 = 0.01

Explanation:

1/10 = √x

(1/10)² = (√x)²

1/100 = x

or x = 0.01

the answer is z = 47.214

Answer:

z = 47.214

Hope this helped

In an ecosystem, a porcupine having sharp gills is  an adaptation that helps protect the animal.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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The balanced chemical equation showing how an aqueous suspension of chromium(III) hydroxide (Cr(OH)3) reacts to the addition of a strong acid (H+) is: Cr(OH)3 + 3H+ → Cr3+ + 3H2O

What is chemical equation?

A chemical equation uses chemical formulas and symbols to clearly depict a chemical reaction. It displays the reactants on the left and the products on the right, with an arrow separating them. The equation lists the names and amounts of the constituent parts of the reaction. For instance:

2H2 + O2 → 2H2O

This equation illustrates how oxygen gas (O2) and hydrogen gas (H2) react to form water (H2O). The stoichiometric ratios, denoted by the coefficients in front of the formulas, show the relative amounts of each substance involved in the reaction.

When a strong acid, represented by H+, is added to an aqueous suspension of chromium(III) hydroxide, the chromium(III) hydroxide acts as a base and accepts the proton (H+). In the balanced equation, three H+ ions react with one molecule of chromium(III) hydroxide, resulting in the formation of chromium(III) ion (Cr3+) and three water molecules (H2O).

Chromium(III) hydroxide has the ability to react with the strong acid due to the presence of hydroxide ions (OH-) in its structure. The hydroxide ions can accept protons from the strong acid, causing the formation of water. This reaction demonstrates the amphiprotic nature of chromium(III) hydroxide, as it can act as a base and accept protons when reacting with a strong acid.

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Complete Question

Chromium(III) hydroxide is amphiprotic.

Write a balanced chemical equation showing how an aqueous suspension of this compound reacts to the addition of a strong acid. Use H+ to represent the strong acid.

The equilibrium constant is 12.5

The equilibrium constant of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by means of a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency towards in addition trade.The equilibrium consistent of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency in the direction of further trade.

Calculations:-

CH₄ + H₂O --------->  CO + 2H₂

[CO] = 10⁻² mol/L

    = 0.01 mol/l

[H₂] = 5 × 10⁻¹ mol/l = 0.5 mol/l

[H₂O] = 10⁻² mol/l = 0.01 mol/l

[CH₄] = 10⁻² mol/l = 0.01 mol/l

K = [CO][H₂]³/[CH₄][H₂O]

 = (0.01) × (0.5)³/(0.01)×(0.01)

Kc = 12.5

Equillibirium constant =  12.5

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Answer:

It is noticed that after five days, there is elongation of the root cells in the roots of onion in the jam bottle

Explanation:

It is noticed that after five days, there is elongation of the root cells in the roots of onion in the jam bottle. The growth of a plant is due to the availability of the growing and  dividing cells in the meristematic regions of the apical meristems. (stem cells). This site are active site for elongation and differentiation  of the stem tissues. In the apical meristem of the root cells, the cells have the potential to carry out mitosis and cell division repeatedly in order to generate newer cells for extension and development of stems and leaves. With each cell division, one cell remains in the meristem which the other increases in size and differentiate due to different genomic expression to form the meristem regions which eventually becomes the stem structure.

Answer:

All of them are equal cause they both have the same sign

Explanation:

Answer:

The correct answer is (b)

Explanation:

Has a slippery feel.Vinegar is an aqueous solution of acetic acid, and it has a number of properties that make it useful in a variety of applications. Some of these properties include:(a) Dissolves in water to give an aqueous solution of acetic acid (H*): Vinegar is composed of water and acetic acid, and it can be dissolved in water to form an aqueous solution.(c) Turns litmus from blue to red: Litmus is a type of dye that is used as an indicator in chemical reactions. It turns blue in the presence of an alkaline solution and red in the presence of an acidic solution. When vinegar is added to litmus, it will turn the litmus red, indicating that it is an acidic solution.(d) Reacts with zinc to give hydrogen gas: When vinegar is mixed with zinc, it can produce hydrogen gas. This reaction is an example of a redox reaction, in which the vinegar is reduced (gains electrons) and the zinc is oxidized (loses electrons).However, vinegar does not have a slippery feel, so (b) Has a slippery feel is not a property of vinegar.

The total mass should be 80g since none of the elements were added in excess so the mass of oxygen will be 32 grams

Explanation: Two moles of magnesium reacts with one mole of oxygen gas to form two moles of magnesium oxide. Therefore 2 moles of magnesium = 48 grams. Therefore 2 moles of magnesium oxide = 80 grams. So, 48 grams of magnesium reacts with 32 grams of oxygen to form 80 grams of magnesium oxide.

Answer:

3000 milligrams

Explanation:

to get milligrams you add 3 zero at the end

The balanced reaction equation is; NH4Cl (aq) → NH3 (aq) + HCl (aq)

The temperature was increasing by 1 degree.

Balancing a chemical reaction equation involves making sure that the same number of each type of atom appears on both the reactant and product side of the equation. This is necessary because the law of conservation of mass states that the total amount of matter in a system must remain constant.

To balance a chemical reaction equation, follow these steps:

Write the unbalanced equation

Count the number of atoms of each element on both sides of the equation.

Add coefficients (numbers in front of molecules) to the reactants or products to make the number of atoms of each element the same on both sides of the equation.

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Answer:

By forming an activated complex with lower energy.

Explanation:

When catalyst is added to a reaction , it forms  an activated catalyst which has lower activation energy . So initiation of reaction requires less energy and reaction becomes fast .

Hence third option is correct.

The basic mechanism that naturally creates freshwater within the hydrologic cycle is through the processes of evaporation, precipitation, infiltration, and runoff.

1. Evaporation: Water from the Earth's surface (e.g., oceans, lakes, and rivers) is heated by the sun and turns into water vapor, rising into the atmosphere.

2. Condensation: The water vapor cools as it rises, condensing into clouds.

3. Precipitation: When the clouds become heavy enough, the water droplets combine and fall back to the Earth's surface as precipitation (e.g., rain, snow, or hail).

4. Infiltration: Precipitation that reaches the ground can infiltrate the soil, becoming part of the groundwater system.

5. Runoff: Precipitation that does not infiltrate the soil will flow over the land surface as runoff, eventually entering rivers, lakes, and oceans.

This continuous movement of water through the various stages is known as the hydrologic cycle. Note that reverse osmosis is not part of this natural process; it is a human-engineered method used for water purification.

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Answer:

Using the graph, we can see that after 4.5 minutes, the bus traveled 4500 meters. Find 4.5 on the x axis, and then see what y value it corresponds to.

Let me know if this helps!

Answer:

By using the data given in the Graph the bus covered 4500meters in 4.5 minutes

Explanation:

neon the answer as the electron arrangement is 2,8

The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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Cooking an egg is endothermic because the egg gains heat from the surrounding and Formation of snow is exothermic because water loses heat to the surroundings wh becomes snow.

Exothermic processes generate heat, which raises the temperature of the surrounding environment. Endothermic processes absorb heat and cool the environment."

Simply put, endothermic reactions absorb energy from their surroundings in the form of heat. An exothermic reaction, on the other hand, releases energy into the system's surroundings. Photosynthesis is a well-known example of an endothermic chemical reaction.

Thus, Cooking an egg is an endothermic process.

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Your question is incomplete, most probably your question was

Which of the following are exothermic and endothermic ?

cooking an egg is endothermic because the egg gains heat from the surrounding Formation of snow is exothermic because water loses heat to the surroundings wh becomes snow. Cooking an egg is exothermic because the egg loses heat to its surroundings.

Explanation:

1) %70 earth is water and %30 is land.

2)" The single cells in the brain communicatethrough electrical and chemical signals.

3) b'coz earth revolve around the sun in365 days and rotates on its axis in 24 hours. It takes 365 days , because it takes that much time to complete one revolution and it takes 24 hours,because it takes time to complete one rotation as mercury takes 81 earthdays to complete one revolution.

4) Human originated from Adam And Eve.

The balanced redox reaction for permanganate oxidizing bromide to form bromine and Mn2+ in acidic conditions can be written as follows:

MnO4¯ + Br- + H+ → Mn2+ + Br2 + H2O

The half-reactions involved in the reaction are:

Reduction half-reaction: MnO4¯ + 8H+ + 5e- → Mn2+ + 4H2O

Oxidation half-reaction: 2Br- → Br2 + 2e-

To balance the electrons in the half-reactions, the oxidation half-reaction is multiplied by 5, giving:

10Br- → 5Br2 + 10e-

Then, adding the two half-reactions and canceling out the electrons yields the balanced redox reaction above.

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