Which of these is an example of physical weathering?

1) Blowing away of lighter rock particles

2) Rock breaking up due to carbonic acid

3) Rock breaking up due to mechanical force

4) Settling down of rock particles in a new location

Physics is a vast field that addresses a wide range of questions about the nature of the physical world. Probing questions can help to explore this field and encourage critical thinking and deep exploration of its topics.

Probing questions are open-ended questions asked to gather information, encourage critical thinking and deep exploration of a particular topic. Physics is a natural science that studies matter and its motion through space-time. It is a branch of science that deals with the fundamental nature of the universe and seeks to explain how and why objects behave as they do in the physical world.The following are some examples of probing questions within the scope of physics:What is the nature of light-The nature of light is an important topic within the scope of physics. It refers to the dual nature of light, as both a wave and a particle. Light behaves as a wave when it is traveling through space and as a particle when it is interacting with matter.How do magnets work-Magnets are a common object in the world around us, and they have a broad range of applications. They work by producing a magnetic field, which can attract or repel other magnetic objects. This topic lies within the scope of physics.What is the relationship between energy and matter-Energy and matter are two fundamental concepts in physics. The relationship between them is described by Einstein's famous equation E=mc2, which states that matter and energy are two forms of the same thing and are interchangeable. The study of the relationship between energy and matter lies within the scope of physics.What is the nature of the universe?The study of the universe's nature is one of the most significant topics within the scope of physics. This question addresses the origins and properties of the universe, its components, and the laws that govern its behavior.

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A food chain refers to the order of events in an ecosystem, where one living organisms eats another organisms and later that organism is consumed by another larger organism. It also explains the feeding pattern.

The food chain is a linear sequence of organisms where the nutrients and energy is transferred from one organism to the other. It begins with the producer and ends with decomposer.

The producers in a food chain consists of all autotrophs like phytoplankton, algae and green plants. It is the producers which utilize the energy from the sun to produce food.

Thus the correct option is B.

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Answer:

4. KCl(s)

Explanation:

KCl is an ionic salt that dissolves in water to form a KCl aqueous solution.

A solution is defined as the homogeneous mixture of one or more solutes dissolved in a solvent. Here in the saturated solution of potassium chloride, the solute is KCl. The correct option is 4.

A solute is defined as the substance which is dissolved in a solution. In a solution the amount of the solute present is always smaller than the amount of the solvent. For example in a salt solution, salt dissolves in water and therefore salt is the solute.

The particles of the solute present in a solution cannot be seen by our eye. The solute from a solution is not possible to separate by filtration. In an unsaturated solution, the concentration of the solute is much lower than that of the concentration of the solvent.

A solution is a combination of the solute and the solvent.

Thus the correct option is 4 - KCl.

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The value of x is 1.

To solve the linear system using Cramer's rule, we need to find the value of x in the equation 1x + 3(2) + 9 = 16.

Simplifying the equation, we have:

x + 6 + 9 = 16

x + 15 = 16

x = 16 - 15

x = 1

Therefore, the value of x is 1.

Cramer's rule is a method used to solve systems of linear equations by using determinants. In this case, we have a single equation with one variable, so the determinant involved is a 1x1 matrix. The determinant of a 1x1 matrix is simply the value of the element.

The determinant of the coefficient matrix in this equation is 1. The determinant of the entire system is the determinant of the coefficient matrix divided by the determinant of the matrix formed by replacing the column of the variable with the constants.

Since the determinant of a 1x1 matrix is the value of the element, we have:

determinant of the entire system = determinant of the coefficient matrix / determinant of the constant matrix

= 1 / 1

= 1

Therefore, the determinant of the entire system is 1.

Using Cramer's rule, we can solve for the value of x by dividing the determinant of the matrix formed by replacing the column of the variable with the constants by the determinant of the coefficient matrix. In this case, both determinants are 1. Thus, The value of x is 1.

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Answer:

I would serve nothing

Explanation:

thank you bye\

Answer:

Explanation:

I would not serve it because what if Their is some dangerous chemical

Answer:

I guess correct option is A.

Answer:

• This is because Sodium is a metal so it loses its one outermost electron to chlorine which is a non metal

Explanation:

An ionic bond is a bond formed between a metal and a non metal after sharing electrons in order to gain stability.

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Answer:

Sodium is metal and Chlorine is a non-metal

Explanation:

An ionic bond is a bond between a metal and a non-metal and also when Na combines with Cl it forms a complete duplex structure making the compound NaCl stable

Answer:

Explanation:

Here, we want to get the number of moles in 4.25 g of CO

To get the number of moles, we have to divide the mass by the molar mass of CO

Mathematically:

The molar mass of CO is the sum of the atomic masses of carbon and oxygen

The atomic mass of carbon is 12 amu

The atomic mass of oxygen is 16 amu

The molar mass is thus:

Thus, we have the number of moles as:

smoke

Explanation:

carbon dioxide is introduced into the atmosphere by burning of fossil fuels and forests

Answer:

100 / 500

Explanation:

100 / 500 is equivalent to 1 / 5.

In H₂SO₄, the oxidation number of H is +1, the oxidation number of S is +6, and the oxidation number of O is -2.

The charge an atom would have if the compound were made up of ions is known as its oxidation number. 1. In a neutral substance with atoms of only one element, the oxidation number of an atom is zero.

The oxidation state, often known as the oxidation number, in chemistry is the hypothetical charge that an atom would have if all of its links with other atoms were entirely ionic.

In sulfuric acid, the oxidation number of H is +1, the oxidation number of S is +6, and the oxidation number of O is -2.

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Barium phosphate is insoluble in water and has a density of 3.63 g/ml. Solubility doesn't affect equilibrium.

Precipitation of barium phosphate from aqueous solution of  barium salt and  phosphate salt forms the basis for  number of conclusions that drawn in chemistry. The formation of a solid white precipitate is taken as an evidence that barium phosphate is insoluble.

Solubility is the upper limit of solute that is dissolved in a given amount of solvent at equilibrium. When this limit is reached, particles leave the surface of solid at the same rate as they return and this is a state of dynamic equilibrium.

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Answer:

If it is elemental gas, the oxidation number is $$0$$.

Explanation:

The oxidation number of an atom in a chemical bond, is the charge left on the atom

Answer:

2024.70 J

Explanation:

The heat capacity of the coffee cup calorimeter can be calculated using the following formula:

q_calorimeter = q_water + q_water_final

where q_calorimeter is the heat absorbed by the coffee cup calorimeter, q_water is the heat lost by the warm water, and q_water_final is the heat gained by the cold water.

First, calculate q_water:

q_water = m_water * c_water * ΔT

where m_water = 25.0 g is the mass of the warm water, c_water = 4.184 J/g°C is the specific heat of water, and ΔT = (40.0°C - 29.5°C) = 10.5°C is the change in temperature.

q_water = 25.0 g * 4.184 J/g°C * 10.5°C = 1057.35 J

Next, calculate q_water_final:

q_water_final = m_water * c_water * ΔT

where m_water = 25.0 g is the mass of the cold water, c_water = 4.184 J/g°C is the specific heat of water, and ΔT = (29.5°C - 20.0°C) = 9.5°C is the change in temperature.

q_water_final = 25.0 g * 4.184 J/g°C * 9.5°C = 967.35 J

Finally, calculate the heat capacity of the coffee cup calorimeter:

q_calorimeter = q_water + q_water_final = 1057.35 J + 967.35 J = 2024.70 J

So the heat capacity of the coffee cup calorimeter is 2024.70 J.

A 25.0 g sample of warm water at 40.0⁰C was added to a 25.0 g sample of water in a Styrofoam coffee cup calorimeter initially at 20.0⁰C. 2024.70 J is the heat capacity of the coffee cup calorimeter.

A physical feature of matter known as heat capacity and thermal capacity is the quantity of heat that must be applied to an object in order to cause a unit change in temperature. Heat capacity is measured in joules per kelvin (J/K), the SI unit. A broad property is heat capacity.

The particular heat capacity, which can be calculated by dividing an object's heat capacity by its mass, is the comparable intense attribute. The molar heat capacity is obtained through dividing the specific heat even by molecular weight of the substance. The heat capacity per volume is gauged by the volumetric heat capacity. The term "thermal mass" is frequently used in civil engineering and architecture to describe a building's ability to hold heat.

q calorimeter = q water + q water final

q water = m ×c water ×ΔT

q water = 25.0 g×4.184 J/g°C ×10.5°C

              = 1057.35 J

q water final = m×c of water × ΔT

q water final = 25.0 g×4.184 J/g°C ×9.5°C

                   = 967.35 J

q calorimeter = q water + q water final

                      = 1057.35 J + 967.35 J

                      = 2024.70 J

Therefore,  2024.70 J is the heat capacity of the coffee cup calorimeter.

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Phenolphthalein is pink in acid and colorles in base.

Substances called indicators are those whose solutions change colour as the pH changes. We refer to these as acid-base indicators. The conjugate base or acid versions of these typically weak acids or bases have various hues because of variations in their absorption spectra. When it comes into contact with an object that has a pH of 8.2, it turns pink. At a pH higher than that, it turns purple.

Additionally, ionisation, which modifies the charge and structure of the phenolphthalein molecule, is the cause of this shift in colour. If it comes into contact with an acid like vinegar or a neutral substance like water, it retains its colorlessness.

Therefore, Phenolphthalein is pink in acid and colorles in base.

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Answer:

Zamir walked

27

meters and Talia walked

19

meters.

Explanation:

27 and 19

Answer:

zamir:27  Talia:19

Explanation:

i got it right on my test :)

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer:

The colorful screenshot is the last Screenshot for the Virual Lab Project. And the last screenshot is the Lab Report. Hope this Helps!

Explanation:

Some might wonder why I am giving out the anwsers because I struggled with these assignmnets and I felt like helping others. Have a nice day/night!

The two properties which can be measured from the given information are streak and cleavage of the mineral.

Minerals are naturally forming inorganic substances having crystal structure and metallic characteristics. They have a definite chemical composition and  homogeneity.

Streak is the color of powder form of mineral and cleavage is how the mineral cleave when we cut through a plane.  Hardness says how much hard the solid is.

When the mineral breaks into cubes when struck with a hammer, we measure its cleavage properties. The red trail on scrapping indicates the streak of the mineral.

Hence, the two properties we can measure from breaking by hammer and scrapping by an unglazed porcelain are its cleavage and streak.

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Orbital:

An orbital may also be called an atomic orbital. Most people think that it is a circle, but the density regions that may contain an electron may be spherical.

An orbital can be defined as the place where an electron could be.

It may refer to an electron cloud having an energy state described by numbers called quantum numbers. Every electron is described by a unique set of quantum numbers.

An orbital in simple words refers to the dimensional motion of an electron around the nucleus in a 3D motion.

The atomic mass of element A, given that the first isotope has abundance of 18.18% and a mass of 147.99, is 131.43 amu

From the question given above, the following data were obtained:

The atomic mass of the element A can be obtain as illustrated below:

Atomic mass = [(Mass of 1st × 1st%) / 100] + [(Mass of 2nd × 2nd%) / 100]

Inputting the given parameters, we have:

Atomic mass = [(147.99 × 18.18) / 100] + [(127.76 × 81.82) / 100]

Atomic mass = 26.90 + 104.53

Atomic mass = 131.43 amu

Thus, the atomic mass of element A obtained from the above calaculation is 131.43 amu

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Answer:

The gecko's feet have tiny suction cups on them that stick to the surface.

Answer:

c) pillars

Explanation:

To calculate the heat gained by the cold liquid, we need to use the formula: q = m * c * ΔT

where q is the heat gained or lost by the substance, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature of the substance.

Let's assume that we have a cold liquid with a mass of 100 grams and an initial temperature of 10°C. We then add 50 grams of a hot solid that has been heated to 80°C. After the solid and liquid are allowed to equilibrate, the final temperature of the mixture is 20°C.

We can first calculate the heat lost by the hot solid using the same formula:

q = m * c * ΔT

q = 50 g * 0.385 J/g°C * (80°C - 20°C)

q = 15400 J

The negative sign indicates that the solid lost heat to the colder liquid.

To calculate the heat gained by the cold liquid, we can use the same formula and the final temperature of the mixture:

q = m * c * ΔT

q = 100 g * 4.184 J/g°C * (20°C - 10°C)

q = 4184 J

Therefore, the heat gained by the cold liquid is 4184 J.

The complete question is :

Use the equation qliquid = m × c × ΔT to calculate the heat gained by the cold liquid. Use the specific heat for the liquid you selected.

Use the equation qwater = m × c × ΔT to calculate the heat lost by the hot water. Show your work using the problem-solving method shown in previous rubrics.

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Answer:

see calculations below

Explanation:

Given:     HOAc     ⇄    [H⁺]     +    [OAc⁻]            

C(i)          0.12M             0M           0.15M

mix  => 5.55ml(0.092M NaOH) / (50ml + 5.55ml)

            = 0.00555(0.092)mole NaOH / 0.0555 L Soln

            = 0.0092M in NaOH is added into the initial buffer solution

            = 0.0092M in OH⁻ (NaOH is a strong base => 100% ionized)

Rxn => Addition of 0.0092M OH⁻ will react with 0.0092M H⁺ shifting buffer            .           equilibrium to the right decreasing [HOAc] and increasing [OAc⁻] by    .           0.0092M each.

Therfore ...

Given:           HOAc      ⇄    [H⁺]     +       [OAc⁻]            

C(i)                0.12M             0M               0.15M

ΔC           - 0.0092M           +x            +0.0092M

C(f)             0.1108M             x                0.1592M  =>  New Concentrations            .                                                                                     after adding 0.0092M             .                                                                                     NaOH

Substituting new acid and ion concentrations into Ka expression ...

Ka = [H⁺][OAc⁻]/[HOAc] = (x)(0.1592M)/(0.1108M) = 1.75 x 10⁻⁵M

=> x = [H⁺](new) = (1.75 x 10⁻⁵M*)(0.1108M)/(0.1592M) = 1.22 x 10⁻⁵M in H⁺ ions

*units of Ka are Molar

FYI => Adding a strong base to a buffer solution will shift pH to more basic.

          Adding a strong acid   to a buffer solution will shift pH to more acidic.

=> (such is a good way to check that your buffer calculations are correct.)

NOTE => Question asks for moles of HOAc, Na⁺OAc⁻ & NaOH after adding base. Giving answers in terms of Molarity (moles/Liter) is same as moles. Therefore ...

[HOAc] = 0.1108M

[NaOAc] = 0.1592M

[NaOH] = ∅M (from rxn of H⁺ + OH⁻ => H₂O, all NaOH was consumed in acid/base reaction.  Remaining are only Na⁺ as a spectator ion and OH⁻ as a function of the new concentration of H⁺ => [OH⁻] = Kw/[H⁺] = 1 x 10⁻¹⁴/1.22 x 10⁻⁵ = 8.2 x 10⁻¹⁰M.

Hope this helps. :-)

D

Polar colvalent means that the atoms making up the bond have a significant electronegativity difference. There is no electronegativity difference between 2 of the same atoms (B/C) and hydrocarbon chains are generally nonpolar (A/E) leaving just D.

The compound C₂H4O2 from the given choices is made up of polar covalent bonds, due to the unequal sharing of electrons between the different atoms.

The compound from the list that would be formed using polar covalent bonds is d) C₂H4O2. Covalent bonds involve the sharing of electron pairs between atoms. In a polar covalent bond, the electrons are not shared equally because one atom exerts a stronger force of attraction on the electrons than the other. The compound C₂H4O2, also known as acetic acid, has polar covalent bonds due to the difference in electronegativity between the carbon, hydrogen, and oxygen atoms.

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