How to use system and habitable in a sentence

Answer:

This self evaluation helps them to better his sport.

Explanation:

This is the right way to evaluate the performance of John because this sketch shows him the way he perform in the match. Due to this sketch he can better his performance and remove all the mistakes he had done in the match which results in better performance of John in the next match. This self evaluation helps them to better his sport and got new chances in order to select for a better club or national soccer team.

Answer:

sorry but it's so hard to do this

Answer and Explanation:

The working-energy theorem defines work as the energy change brought on by the velocity change. The environment has acted on the object and it increases the energy of the object. When an object's velocity decreases, the object has worked on the world, and the object's energy decreases.

Unless the displacement is in the reverse direction and the force applied, then the work performed is negative. If the displacement is in the same direction and the force applied, then the work performed is positive.

Answer:

Work is the change in energy brought about by a change in velocity.  

When the velocity of an object increases, the environment has done work on the object and the energy of that object is increased.  

When the velocity of an object decreases, the object has done work on the environment and the energy of the object is decreased.

Explanation:

Answer:

Robot 1 : 150 J

Robot 2: 40 J

Explanation:

30 N x 5m = 150 J

20 N x 2m = 40 J

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The final pressure of the car tire after heating from 38°C to 123°C is approximately 2.29 atm.

To calculate the final pressure of the car tire, we can use the ideal gas law, which states that:

PV = nRT

where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature of the gas in Kelvin.

We can assume that the volume of the car tire remains constant, so we can simplify the ideal gas law to:

P1/T1 = P2/T2

where P1 is the initial pressure, T1 is the initial temperature in Kelvin, P2 is the final pressure, and T2 is the final temperature in Kelvin.

To solve for P2, we need to convert the temperatures from Celsius to Kelvin:

T1 = 38°C + 273.15 = 311.15 K

T2 = 123°C + 273.15 = 396.15 K

Now we can substitute the values we have:

P1/T1 = P2/T2

1.8 atm / 311.15 K = P2 / 396.15 K

To solve for P2, we can cross-multiply and simplify:

P2 = (1.8 atm) x (396.15 K) / (311.15 K)

P2 = 2.29 atm

Therefore, the final pressure of the car tire after heating from 38°C to 123°C is approximately 2.29 atm.

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Taking into account the reaction stoichiometry, 1 mole of potassium hydroxide would react with 1 mole of hydrochloric acid

In first place, the balanced reaction is:

KOH + HCl  → KCl + H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

You can see that the stoichiometric mole ratio of KOH to that of HCl is 1:1. This means that 1 mole of KOH will require 1 mole of HCl.

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The reaction's net ionic equation  when sodium phosphate is added to hard water to soften it.

3Ca2++2PO3−4→Ca3(PO4)2(s)

The chemical conversion of one group of chemical constituents into another is known as a chemical reaction.

Chemical reactions take place when atoms' chemical bonds are made or broken.

Reactants are the substances that start a chemical reaction, while products are the substances that come out of the process.

Through chemical processes, plants develop, begin to produce fruit, and then disintegrate to become compost for new plants.

High mineral content water is referred to as hard water. When water percolates through limestone, chalk, or gypsum deposits, which are mostly composed of calcium and magnesium carbonates, bicarbonates, and sulfates, hard water is created. Drinking hard water may offer some health advantages.

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A balanced chemical equation for the combustion of gaseous methanol is:2CH3OH (g) + 3O2 (g) → 2CO2 (g) + 4H2O(g).

Bond energy in C-H bonds is equal to 413 kJ/mol. Bond energy in O-H bonds is equal to 463 kJ/mol.Let us use Hess’s Law for the calculation of enthalpy of reaction.

The enthalpy of combustion of methanol can be given as follows: H = [2 × BE(C=O)] + [4 × BE(O-H)] - [2 × BE(C-H)] - [3 × BE(O=O)]Here, BE stands for bond energy. H = [2 × 799 kJ/mol] + [4 × 463 kJ/mol] - [2 × 413 kJ/mol] - [3 × 498 kJ/mol]H = -726 kJ/mol Thus, the enthalpy of combustion of methanol is -726 kJ/mol.

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Answer:

Explanation:

These are normal field cows. When they are resting they are not chewing food but are actually chewing their cuds. By doing so they generate saliva which helps them properly digest all of the food that they have eaten and protect their stomach from any harmful chemicals that they may have ingested. A secondary benefit is also that it helps them produce milk more often. This is why you see these cows chewing at all times of the day even when they are not currently eating.

Answer:

480 million years old

Explanation:

The second row of the table, which deals with the equilibrium of a system, can be completed by filling in the missing information.C: Q < KeqWhen Q < Keq, the reaction will proceed in the forward direction. It means that the concentration of reactants will be higher than the concentration of products.

The forward reaction is thus favored When the forward reaction is favored, the equilibrium constant Keq is greater than the reaction quotient Q. As a result, there is an increase in the concentration of products to reactants until the Keq and Q values become equal. As a result, the reaction proceeds in the forward direction to achieve equilibrium. This case is also referred to as the reaction proceeding spontaneously in the forward direction

When Q > Keq, the concentration of the reactants is higher than the concentration of products, and the reaction is in the reverse direction. The reverse reaction is favored in this case. The reaction proceeds in the reverse direction to establish equilibrium when the concentration of products increases to that of reactants, and the Keq and Q values become equal. This case is referred to as the reaction proceeding spontaneously in the reverse direction.When Q = Keq, the reaction is at equilibrium, which means that the rate of the forward reaction is equal to the rate of the reverse reaction. As a result, the concentration of products and reactants remain constant.

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Answer:

There are 118 elements in the nature.

Metals s = 92

Non metals = 20

Metalloids Ms = 6

Explanation:

6 electrons are lost in all in redox reaction between aluminium  and manganese ion as aluminium looses  3 electrons to get oxidized and manganese get 2 electrons to get reduced hence 3×2=6 electrons are lost.

Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species. Electrons which are given off in oxidation are used up in reduction.

The ion or molecule which accepts electrons is called as oxidizing agent while the ion or molecule which donates electrons is called as a reducing agent.

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The heat released in each reaction is:

Reaction 1: 3700J

Reaction 2: 3200J

What is heat?

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Hydroboration of terminal alkynes yields aldehydes.

Here's a step-by-step explanation:

1. Terminal alkynes are reacted with a borane reagent (such as BH₃) in a process called hydroboration.
2. During hydroboration, the borane adds across the triple bond of the terminal alkyne in a syn addition, resulting in the formation of an organoborane intermediate.
3. The organoborane intermediate is then oxidized with hydrogen peroxide (H₂O₂) and a hydroxide ion (OH⁻) in a process called oxidation.
4. This oxidation step converts the organoborane intermediate into an aldehyde functional group.

So, the correct answer is (c) aldehyde.

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The hydroboration of terminal alkynes yields an aldehyde. During the hydroboration process

boron and hydrogen are added across the carbon-carbon triple bond of the alkyne, which yields an unstable intermediate. This intermediate quickly reacts with water to form an aldehyde.

It is important to note that the product of the hydroboration of an alkyne can be influenced by the reaction conditions and the substituents present on the alkyne. However, for a terminal alkyne, the product is typically an aldehyde.

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To determine whether each statement about rain or acid rain is true or false. Please find the evaluation of each statement below:

1. There is more acid rain in the Western vs. Eastern United States.
False. There is more acid rain in the Eastern United States due to higher concentrations of sulfur oxides and nitrogen oxides from industrial activities and power plants.

2. Unpolluted rain water is acidic and approximately 3.6 on the pH scale.
False. Unpolluted rainwater is slightly acidic with a pH of around 5.6. This is due to the natural presence of carbon dioxide in the atmosphere, which dissolves into water and forms carbonic acid.

3. Sulfur oxides and nitrogen oxides in the troposphere cause acid rain.

True. Sulfur oxides (SOx) and nitrogen oxides (NOx) are released from various sources like industrial processes, power plants, and vehicle emissions. These gases react with water, oxygen, and other substances in the troposphere to form sulfuric acid and nitric acid, which then fall to the earth as acid rain.

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Answer:ice crystals

Explanation:

Answer:

Buoyancy is the ability or tendency of an object to float in a fluid: a liquid or a gas. This happens because fluid pressure increases with depth. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.

Explanation:

Answer:

Glucose will enter the cell through osmosis.

Explanation:

Diffusion causes molecules to move from high concentration to low concentration, so the glucose molecules outside the cell will move through the membrane to inside of the cell.

The elements in the A-groups are often called representative elements. Option e correct" representative elements" .

They are elements of the periodic table belonging to group 1 to 2 (alkali metals and alkaline earth metals) and group 13 to 18. There are 8 groups in the A-group of the periodic table, which consists of 18 columns. The term "representative elements" is used to distinguish these elements from transition elements (the B-group elements) and the inner transition elements (the lanthanides and actinides).

The representative elements contain a varied range of physical and chemical properties that distinguish them from each other. Their electronic configurations consist of the same number of electrons in the outermost shell, or valence shell, giving them similar chemical characteristics. Thus, the elements in A-groups are called representative elements, and they are considered to be the building blocks of the periodic table.

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Density of liquids is more than that of gases. Thus, the correct answer is (a).

A liquid has molecules that are closely spaced out. As a result, liquids have a higher density than gases.

The mass of a material per unit of volume is its density. Density is most frequently represented by the symbol ρ, but Latin letter D may also be used.

The amount of items in a space—which might include humans, animals, plants, or objects—is referred to as the space's density. Divide the number of items by the area's measurement to determine density. A country's population density is calculated by dividing its total population by its area, expressed in square kilometres or miles.

In comparison to liquids and gases, solids are denser than liquids and gases, respectively. The solid's particles are close to one another and have very little room to move. In a liquid, the particles are often still in contact, although there are gaps between them. There are considerable gaps between the gas particles.

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In many acid-base reactions, a starting material with a net Positive charge is usually an acid while a starting material with a net Negative charge is often a base.

In many acid-base reactions, a starting material with a net positive charge is usually an acid, while a starting material with a net negative charge is often a base. Acids are substances that can donate protons (H+) and are therefore positively charged when they lose a proton. Bases, on the other hand, can accept protons (H+) and tend to have a net negative charge when they gain a proton. This is based on the concept of proton transfer in acid-base reactions, where the acid donates a proton (positive charge) to the base, resulting in the formation of a new acid and base. It's important to note that not all acids or bases have a net charge, as their acidity or basicity can also be determined by other factors such as electron pair donation or acceptance.

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According to the research, the correct answer is that the role that density plays is that density differences propagate the movement of convection currents when they absorb heat in a portion.

It refers to the magnitude that reflects the link that exists between two magnitudes, the mass of a body and its volume.

In this sense, convection currents are generated by differences in density where, due to heating a material, it increases in volume and, therefore, its density decreases and ascends, displacing the fluid that is in the upper part.

Therefore, we can conclude that the movement of the convection currents is caused by differences in density due to differences in temperature.

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Answer:167.9 g Ag

Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2

63.55 g Cu —> 2*107.688 g Ag

So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag

When Muhammad died, his followers carried on the new religion. Islam prospered and grew under the Caliph Abu-Bakr and those who followed him. What cities became hubs of Muslim thought and power? How did word of this new religion spread? Did it appeal to people outside the Arabian Peninsula?

Explanation:

The correct isomer of C4H10O based on its 13C NMR spectrum is option B. In the given 13C NMR spectrum, we have four distinct peaks at δ 18.9, δ 30.8, and δ 69.4.

From the spectrum, we can identify the number of carbons corresponding to each peak:  The peak at δ 18.9 represents two carbon atoms, which indicates the presence of a CH3 group.

The peak at δ 30.8 represents one carbon atom, indicating the presence of a CH group, the peak at δ 69.4 represents one carbon atom, indicating the presence of a CH2 group. Based on these observations, the only isomer that matches this spectrum is option B.

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The atmospheric pressure of 745.8 mm Hg is slightly lower than the standard atmospheric pressure of 760 mm Hg. This is because the atmospheric pressure can vary depending on the weather conditions.

The conversion units to be used are:-

Atmospheres: 745.8 mm Hg / 760 mm Hg/atm = 0.981 atm

Torr: 745.8 mm Hg = 745.8 torr

Kilopascals (kPa): 745.8 mm Hg * 1.333224 kPa/mm Hg = 994.3 kPa

1 atmosphere (atm) is equal to 760 millimeters of mercury (mm Hg) or 101.325 kilopascals (kPa). A torr is a unit of pressure equal to one millimeter of mercury. For example, the atmospheric pressure is usually lower at high altitudes and during storms.

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Viscosity  is the experimental parameter used to assess a liquid's resistance to flow.

Viscosity is the ability of a fluid (liquid or gas) to resist changing its shape or allowing nearby parts to move in relation to one another. Viscosity is a sign of flow resistance.

The fluidity, a metric indicating the ease of flow, is the reciprocal of viscosity. For instance, molasses is more viscous than water.

The viscosity of a liquid is a significant metric because the user may interpret it as a gauge of quality; in some cases, a thicker liquid may be perceived as having higher quality than a thinner one.

The texture of food also has a property called viscosity.

Therefore, viscosity  is the experimental quality that serves as a measure of resistance to flow of a liquid.

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