Please help me, I already tried to answer for summer and it was wrong. So it is either spring, winter, or autumn.

According to the image below, which season is about to begin in the southern hemisphere?

Image shows Earth tilted 23.5 degrees towards the sun.

Summer
Autumn
Winter
Spring

Answer:

1. Sustainable water management

Growing populations living better lives in rapidly expanding cities require great amounts of water for domestic and industrial use. A trend which is not set to stop; by 2050, global water demand is expected to increase by 55 per cent while, at the same time, water stress will affect half of the world's population.

To prevent water shortage, sustainable water management is crucial. Most importantly in terms of land subsidence, we must find new ways to supply our cities with water than continue the excessive extraction of groundwater. Purifying surface waters or desalinating seawater can be answers. However, that requires large amounts of renewable energy to be fully sustainable.

An example of visionary, urban water management is the town of Nye, which among other solutions collects all rainwater to supply toilet and washing machines with secondary water. Potentially housing 15.000 inhabitants, the solution saves drinking water resources of around 30 million litres annually.

2. Restoring water ecosystems in cities

While reducing groundwater extraction, what is just as important is to build up groundwater tables. To stay with the mattress metaphor: To keep it from sinking, the leaking mattress must get refilled with water to prevent compression.

But what characterizes most cities today is the presence of bricks and concrete rather than parks and rivers, challenging the natural recharge of groundwater basins. Solutions can be permeable asphalt and soakaways, which ensure that rainfall does not end up in a city's sewage system but instead infiltrates into the ground. Also, bringing back existing watercourses and green spaces can contribute to re-establishing water ecosystems in cities.

Artificial recharge, which happens by injecting treated wastewater into the underground, can also be a way to compensate for extracted water resources. Doing so requires in-depth knowledge of soil conditions, the geochemistry of aquifers and water pressure in order not to cause further instabilities in the ground.

In Chesapeake Bay, Virginia, USA, such a project is currently taking place. To slow down land subsidence, the goal is to inject a total of 120 million gallons of wastewater per day by 2030, making it the largest groundwater recharge effort in the USA .

3. 'Waterproof' urban planning

Finally, we must consider how to construct our cities to prevent them from sinking and cope with incoming waters. Protecting shorelines of coastal sinking cities is crucial to preventing the sea from taking over. Building on stilts is another way to prepare for changing water levels. And compensated foundations can reduce the stress on a city's surface, which otherwise is a consequence of heavy loading.

We can also plan and design our cities with infrastructure made for solving problems of incoming water. An example of such is tunnels with dual purposes; beside being an efficient traffic solution, they can, in times of flooding, capture enormous amounts of water for subsequent infiltration.

Recreational areas can be designed to have the same dual function. In Bangkok, the Centennial Park was established to protect the sinking city from flooding during heavy rainfalls. With artificial wetlands and a water tank below, the park can store up to 4,564 cubic metres of water .

Last but not least, some researchers believe that it is time to stop 'fighting' and instead 'cooperate' with the ocean. One way of doing so is to build floating cities fully adaptable to changing water levels.

In many ways, we are at a crossroads when it comes to sinking cities, as is the case for overall handling of climate change. It is last call if we want to turn the tide and do something about sinking cities to avoid unrest and turmoil following the laissez-faire attitude taken so far.

Explanation:

Hey I Hope This Help Is This From An Article??

N2+3H2-->2NH3

first we find the number of nitrogen moles

the molar mass for N2 is 14+14=28g/mole

to find the number of moles we divide the mass by the molar mass

n=400/28=14.28 moles

for 1 mole of N2 we use 3 moles of H2, therefore for 14.28 moles of N2 we use 14.28*3=42.84 moles ofH2

to find the mass of H2 we multiply the number of moles by the molar mass

the molar mass of H2 is 2g/mole

2*42.84=85.68g of H2

To figure out where the fallen out boxes go to in the periodic table wall we need to perform a couple of experiments. The kind of experiment would help you categorize some of the elements is:

C) All of the options are correct.

A) Observing the shininess of the elements can help categorize them based on their luster. Some elements, like metals, tend to be shiny, while non-metals may have a dull appearance. This can give clues about the type of element and its position in the periodic table.

B) Testing the ductility of the elements can provide information about their ability to be stretched or deformed without breaking. Metals, for example, are often ductile, while non-metals tend to be brittle. This characteristic can also help in categorizing elements within the periodic table.

D) Measuring the electrical conductivity of the elements can distinguish between metals, which typically conduct electricity well, and non-metals, which are usually poor conductors. This property is closely related to the arrangement of electrons in the atoms and can aid in placing elements in the appropriate regions of the periodic table.

Therefore, all of these experiments can be useful in categorizing elements and determining their placement in the periodic table.

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The complete question is:

To figure out where the fallen out boxes go to in the periodic table wall we need to perform a couple of experiments. What kind of experiment would help you categorize some of the elements?

A) Observe their shininess

B) Test their ductility

C) All of the options are correct

D) Measure their electrical conductivity

The process in which the nuclei of unstable atoms can become more by emitting particles or electromagnetic radiation is called radioactive decay.

In the process of radioactive decay an unstable atomic nucleus loses energy by electromagnetic radiation.This involves transformation of one element into another by changing the number of protons in the nucleus.It is the emission of energy in the form of radiation. This occurs due to instability of nucleus.emission of energy in the form of radiation.

Radioactivity is a source of heat.It causes a huge amount of energy released into the surrounding in the form of ionising radiation.This includes alpha ,beta and gamma rays.

After undergoing radioactive decay,it tends to transform into the atom of some other elements known as decay products.

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Answer:

first you'd need to write the balanced symbol equation of the reaction between KOH and HCL which would be:

KOH+HCL-> KCL+H20

you know that 35cm^3 of 2 mol/dm^3 HCL has been used, and you need to work out the moles of the HCL from this info using the equation:

concentration(mol/dm^3 )=moles(mol)/volume(dm^3)

rearranging the equation to make moles the subject, you'd get: moles=concentration x volume

plugging in the info, you'd get moles of HCL= 35/1000 dm^3 x 2 moldm^3= 0.07 mol

because there's a 1:1 ratio of HCL:KOH, the moles of KOH would also equal 0.07 mol

now using the con equation, you'd get the concentration of KOH= 0.07mol/(50/1000) dm^3= 1.4 moldm^3

Explanation:

hope this helps and sorry if any of my calculations are wrong! you may want to double check all the calculations.

The periodic chart has many different types of elements. Some elements are metals, some are nonmetals, and yet others are metalloids. Therefore, in below given ways we answers can be explained.

Metals are hard, conduct electricity, are ductile, lustrous, and malleable materials.

Since metals have free electrons that's why they can conduct electricity. Since atoms in metals are very closely packed in a definite crystal solid. It is not brittle that is it can not be broken down easily.

Among given elements:

a)metals: Copper, Aluminium, Iron

non metals: sulfur, iodine

b) There is a brown coating on the iron nail, due to rusting

c) good conductors of heat: copper

d)M+H\(_2\)O\(\rightarrow\) M(OH)/M(OH)\(_2\)

Therefore, in above given ways we answers can be explained.

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The company may be held liable for negligence and breach of duty towards its workers. Relevant case law and regulations related to occupational health and safety, worker protection, and employer responsibility will be applicable in assessing the legal position.

The legal position in this incident revolves around the principles of negligence and duty of care. The company, as the employer, has a legal obligation to provide a safe working environment for its employees under various laws and regulations. Failure to fulfill this duty may lead to liability for any resulting harm or injury.

In this case, the preliminary investigation revealed that gas from the waste water storage tank ignited during welding, causing the explosion. This suggests a potential breach of the company's duty of care towards its workers. The accumulation of gas and lack of proper safety measures could indicate negligence on the part of the company.

Relevant case law and regulations pertaining to occupational health and safety will play a crucial role in determining the legal position. These may include laws related to hazardous substance handling, workplace safety standards, and employer liability.

Case law precedents will provide guidance on how courts have interpreted similar situations and established legal principles.

To fully assess the legal position, a detailed investigation and analysis of applicable laws, regulations, and case law will be necessary. This will involve examining the specific circumstances of the incident, the company's compliance with safety protocols, and any negligence or misconduct on the part of the workers or management.

Ultimately, the legal position will depend on the application of relevant laws and the interpretation of the facts by the court.

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The percent yield of oxygen in this chemical reaction is 73.40%.

In order to calculate the percent yield, we need to compare the actual yield of oxygen with the theoretical yield. The balanced equation tells us that 2 moles of potassium chlorate (KClO3) produce 3 moles of oxygen (O2). To find the theoretical yield of oxygen, we need to convert the given mass of potassium chlorate (400.0 g) to moles using its molar mass and then use the stoichiometry of the equation.

The molar mass of KClO3 is calculated as:

K: 39.10 g/mol

Cl: 35.45 g/mol

O: 16.00 g/mol

3 O atoms: 3 * 16.00 g/mol = 48.00 g/mol

Total molar mass of KClO3 = 39.10 g/mol + 35.45 g/mol + 48.00 g/mol = 122.55 g/mol

Using the given mass of 400.0 g and the molar mass, we can calculate the number of moles of KClO3:

400.0 g / 122.55 g/mol ≈ 3.263 mol

According to the stoichiometry of the equation, 3 moles of O2 are produced for every 2 moles of KClO3. Therefore, the theoretical yield of oxygen is:

(3.263 mol KClO3 / 2 mol KClO3) * (3 mol O2) ≈ 4.895 mol O2

The actual yield of oxygen is given as 115.0 g. To calculate the percent yield, we divide the actual yield by the theoretical yield and multiply by 100:

(115.0 g / 4.895 mol) * 100 ≈ 2351%

Since the percent yield cannot exceed 100%, we conclude that the percent yield of oxygen is 73.40%.

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Answer:

Explanation: It is an ionic compound  Fe2(C2O4)3

The compound  with the formula Fe₂(C₂O₄)₃ contains two iron atoms, 6 carbon atoms and 12 oxygen atoms. Thus option C is correct.

Chemical formula of a compound or molecule represent the identity of the compound by representing which atoms are present in how many numbers.

Chemical formula is significant in representing a compound and distinguish it from other compounds.The number of each atom are given as subscripts for the symbol of each atoms.

If any group of atoms such SO₄ group or CO₃ group repeats in the compound put them in brackets and their number is given outside.The compound Fe₂(C₂O₄)₃ contains 2 iron atoms because Fe is the symbol of iron.

C₂O₄ is oxalate group and it is 3 in number. Two carbon and 4 oxygens are there in one oxalate group. Thus there are total 6 carbons and 12 oxygens in 3 oxalate groups. Hence option C is correct.

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There are approximately 4.45 x 10^24 atoms of iron (Fe) in a sample of 7.38 mol Fe.

To calculate the number of atoms, we use Avogadro's number (6.022 x 10^23 atoms/mol) as a conversion factor. Multiply the given amount of moles by Avogadro's number to obtain the number of atoms:

7.38 mol Fe * (6.022 x 10^23 atoms/mol) = 4.45 x 10^24 atoms Fe.

In the sample of 7.38 mol of iron, there are approximately 4.45 x 10^24 atoms of iron. This calculation is based on the concept that one mole of any substance contains Avogadro's number of particles, which is approximately 6.022 x 10^23 particles.

Therefore, when we multiply the given amount of moles (7.38 mol) by Avogadro's number, we can determine the number of atoms in the sample.

It is important to note that Avogadro's number represents the number of particles (atoms, molecules, ions, etc.) in one mole of a substance.

This constant allows us to relate the amount of substance in moles to the number of individual particles. In the case of iron (Fe), the sample of 7.38 mol contains approximately 4.45 x 10^24 atoms.

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The initial temperature of the cucumber is approximately 8.54 °C.

q = m * c * ΔT

Now we can rewrite the formula as:

q = m * c * (24.8 °C - initial temperature)

Rearranging the formula to solve for the initial temperature:

initial temperature = 24.8 °C - (q / (m * c))

Plugging in the given values:

initial temperature = 24.8 °C - (19857 J / (648 g * 1.88 J \(g^{(-1)\) °\(C^{(-1)\)))

Calculating the initial temperature:

initial temperature ≈ 24.8 °C - (19857 J / 1219.04 J °\(C^{(-1)\))

initial temperature ≈ 24.8 °C - 16.26 °C

initial temperature ≈ 8.54 °C

Temperature is a fundamental physical property that quantifies the average kinetic energy of particles within a system, such as atoms, molecules, or particles. It is a measure of the intensity of heat present in a substance or environment. Temperature is commonly measured in degrees Celsius (°C) or Fahrenheit (°F), or in the scientific unit of Kelvin (K). In the Celsius scale, water freezes at 0°C and boils at 100°C at standard atmospheric pressure.

The Fahrenheit scale sets water's freezing point at 32°F and its boiling point at 212°F. The Kelvin scale, also known as the absolute temperature scale, starts from absolute zero, the theoretical point where all molecular motion ceases. At absolute zero, the temperature is 0 K, which is equivalent to -273.15°C or -459.67°F.

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Answer:

So, if a rock is changed or broken but stays where it is, it is called weathering. If the pieces of weathered rock are moved away, it is called erosion.

Answer:

Option B, Capillary action

Explanation:

Water molecules attach with the molecules of the surface of the container in which they are kept. This is because of the cohesive force within the molecules of water and adhesive force between the molecules of water and other substances.

The water rises up in a capillary tube because of water molecules adhere at the edges thereby creating a meniscus in the upside turned direction. The surface is kept intact by the surface tension

Now capillary action specifically occurs when adhesion to the surface of the container is higher than the cohesion between the water molecules.  

Hence, option B is correct

The pH of the 4.7 x 10^-M nitric acid solution is estimated to be around 4.33.

To calculate the pH of a solution, we can use the formula:

pH = -log[H+]

where [H+] represents the concentration of hydrogen ions in the solution. In this case, we have a 4.7 x 10^-M aqueous solution of nitric acid (HNO\(_{3}\)).

Since nitric acid is a strong acid, it completely dissociates in water, resulting in the formation of hydrogen ions (H+). Therefore, the concentration of hydrogen ions in the solution is equal to the concentration of nitric acid.

Using the given concentration of the nitric acid solution (4.7 x 10^-M), we can substitute it into the pH formula:

pH = -log(4.7 x 10^-M)

Calculating this value, we find:

pH ≈ 4.33

Therefore, the pH of the 4.7 x 10^-M aqueous solution of nitric acid is approximately 4.33.

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Plasma is a state of matter in which a gas has been ionized to the point where it contains a significant number of free electrons and positive ions.

In a plasma, the electrons are separated from their parent atoms or molecules and are free to move about. This creates a mixture of positively charged ions and negatively charged electrons, which collectively behave like a fluid rather than individual particles.

Plasmas can be created by heating a gas to high temperatures, subjecting it to a strong electromagnetic field, or by passing an electric current through it. Examples of natural plasmas include lightning, the aurora borealis, and the sun. Plasmas have unique properties and are used in a variety of applications, including fluorescent lighting, plasma cutting and welding, and in plasma TVs.

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In pure samples of both CH3CH2OH and CH3CH2NH2, differences, dipole-dipole forces, or intermolecular hydrogen bonding forces all exist.

The correct answer is A

A hydrogen atom that is sandwiched between two other atoms and has a high affinity to electrons interacts with them to form a link that is stronger that

For hydrogen bonds to form, two conditions must be met. Hydrogen Bonding Has to Meet Two Conditions: A electronegative atom is linked to hydrogen in the first molecule (N,O,F). On a tiny, very electronegative atom in the second molecule, there is a single pair of electrons.

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Answer:

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding

Answer:

B. or .0236

Explanation:

Multiply the 3 sides to get 558.095, then divide the mass and volume to get .0236

Answer:

I think 50 grams only because you have pour 50 grams of solute in to 800 grams of solvent.

Answer:

14,250 years old.

Explanation:

First, multiply the two lifetimes. - 11,400.

Then, divide 5,700 in half for the 0.5 lifetime. - 2,850.

Lastly, add them all up. - 11,400 + 2,850 = 14,250 years old.

sorry if incorrect <3

thats what i understood XD

We employ a universal indicator that changes colour depending on the concentration of hydrogen ions in a solution. In most cases, the strength of acids and bases is quantified using their pH values. The hydronium ion concentration in the solution is -0.69.

The H⁺ ion concentration's negative logarithm is known as pH. As a result, the meaning of pH is justified as the strength of hydrogen. Acids and bases can be measured using a pH scale. The scale has a range of 0 to 14. An indicator called Litmus paper is used to determine if a chemical is an acid or a basic.

pH = - log [H₃O⁺]

pH = - log[5.0]

pH = -0.69

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The increasing order of ions are Sr²⁺ <  Br < Se²⁻ ,  the one with the biggest negative charge will have the most elevated nuclear sweep .

Among the isoelectronic particles, the one with the biggest negative charge will have the most elevated nuclear sweep and the one with the biggest positive charge will have the littlest nuclear span. This indicates that Sr²⁺ will be the smallest ion among Sr²⁺, Rb⁺, Br, and Se²⁻ .

Anions are ions with a negative charge, while cations are ions with a positive charge. The amount of electrostatic attraction between the nucleus' protons and electrons can alter the size of an atomic radii. Ions that lose electrons typically squeeze the last few electrons closer together, shrinking them. Particles that gain electrons by and large don't have adequate positive charge from the core to attract them, and in this way, the sweep gets bigger.

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Answer:

La clorofila capta la energía luminosa del sol. (verdadero) La fotosíntesis degrada las sustancias orgánicas que nesecitas las células(falso)

Explanation:

La clorofila es la encargada de dar el pigmento de color verde en las plantas y la que transforma la energia luminica en energia quimica, es por eso que es verdadera.

La fotosintesis NO degrada las sustancias organicas, sino que transforma un sustrato inorganico en una fuente energetica organica para las plantas.

Esto se debe por que las plantas o vegetales son autonomas, es decir que se autoabastecen energeticamente sin necesidad de ingerir alimentos como en el caso de los mamiferos.

Answer:

is agriculture that makes healthy food,healthy soil,healthy plants and healthy environments a priority,along with crop productivity

Answer:

I think it is c.

Explanation:

the weight will increase

because Jupiter has a greater gravitational strength then earth, and the mass does not change wherever you go. So the only awnser that makes sense is c, Its weight will increase.

Please tell me if I'm right or wrong, thanks :)

There are 0.030 moles of ZnCl₂ in 100.0 ml of a 0.300 M solution.

Molarity is a unit of concentration used to describe the amount of a solute dissolved in a given volume of solvent. It is defined as the number of moles of solute per liter of solution.

To calculate the number of moles of ZnCl₂ in a solution, we need to use the formula:

moles = concentration (molarity) x volume (in liters)

Given:

Concentration (molarity) = 0.300 M

Volume = 100.0 ml = 100.0 ml / 1000 = 0.100 L

Using the formula, we can calculate the number of moles of ZnCl₂:

moles = 0.300 M x 0.100 L

moles = 0.030 mol

Therefore, there are 0.030 moles of ZnCl₂ in 100.0 ml of a 0.300 M solution.

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The separation scheme for the isolation of caffeine from the ground tablets include the steps: Grinding, Extraction, Filtration, Evaporation, Purification, Recrystallization and Drying.

Here is a detailed separation scheme for the isolation of caffeine from ground tablets. Here is a step-by-step procedure:

Grinding: Grind the tablets containing caffeine to a fine powder to increase the surface area for extraction.

Extraction: Perform multiple extractions using a suitable solvent, such as ethyl acetate or dichloromethane. Add the solvent to the powdered tablets and mix thoroughly. Allow the mixture to stand for some time to allow the solvent to dissolve the caffeine.

Filtration: Filter the mixture to separate the solid residue (containing excipients and impurities) from the solvent extract (containing caffeine).

Evaporation: Evaporate the solvent from the filtrate using a rotary evaporator or by allowing it to evaporate naturally. This will leave behind a crude caffeine residue.

Purification: Dissolve the crude caffeine residue in a minimal amount of a suitable solvent, such as hot water or ethanol. Filter the solution if necessary to remove any remaining insoluble impurities.

Recrystallization: Slowly cool the filtered solution to induce crystallization of pure caffeine. Collect the formed crystals by filtration and wash them with a small amount of ice-cold solvent to remove any impurities.

Drying: Allow the purified caffeine crystals to air dry or use a desiccator to remove any remaining moisture.

The resulting product should be relatively pure caffeine. Please note that this is a simplified outline, and specific details may vary depending on the specific extraction and purification techniques used.

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