why plastic containers are prefered for storing food​

La fuerza de la gravedad depende de la masa (el peso) de cada objeto. La fuerza con que se atraen dos objetos es proporcional a su masa y disminuye rápidamente en el momento en que los separamos. De hecho, nosotros también atraemos objetos con ‘nuestra’ fuerza gravitatoria, pero pesamos tan poco que no podemos percibirlo. En cambio, el Sol es tan grande que es capaz de mantenernos girando a su alrededor a pesar de estar muy lejos. La Luna también ejerce su propia fuerza gravitatoria, pero, como es más pequeña y ligera que la Tierra, si nos pesásemos sobre su superficie veríamos que pesamos unas seis veces menos que en la Tierra.

Podríamos preguntarnos por qué la Luna no cae sobre la Tierra al igual que una manzana cae del árbol. La razón es que nuestro satélite nunca está quieto. Se mueve constantemente a nuestro alrededor. Sin la fuerza de atracción terrestre, se alejaría flotando en el espacio. Gracias a esta combinación de velocidad y distancia de nuestro planeta, la Luna siempre está en equilibrio, ni cae ni se aleja. Si se moviera más rápido, se alejaría, si se moviera con más lentitud, ¡caería!

Hemos dicho que la fuerza de la gravedad también depende de la distancia. Si nos alejásemos lo suficiente de la Tierra, escaparíamos a su fuerza de atracción. Y eso es lo que tratamos de hacer con las naves espaciales. Necesitamos superar la llamada ‘velocidad de escape’, que es aproximadamente 11,2 km/s (a esa velocidad, podríamos viajar de Londres a Nueva York ¡en tan solo 10 minutos!). Cuando un cohete alcanza esa velocidad, ya es libre para viajar por el sistema solar.

Dentro de una nave en órbita, no sentimos la fuerza de la gravedad terrestre. Los objetos no caen, sino que flotan, así que si saltas, no regresas al suelo. Es lo que les ocurre a los astronautas cuando están a bordo de una estación espacial que orbita alrededor de la Tierra.

Your answer is A. What is the composition of air?

The question that can be answered by science is What is the composition of air? The correct option is A.

Science is a subject that deals with the components of the earth. It has a wide variety of components of earth. Like planets and meteorites. Plants, animals, and other creatures. Nature, trees, and other abiotic factors.

Science gives answers to the secrets of the earth, and they unravel the mysteries of nature and the earth. They solve the mysteries of air, water, and other natural processes.

So the composition of air can be told by science. The air is made up of a mixture of gases. Air is present in the atmosphere. It is needed for breathing, and it is an important component of life because it provides oxygen to the body.

The correct option is A. What is the composition of air?

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The following is a plausible scenario for the work of CoQ in the electron transport chain: CoQ is reduced by Complex I & later oxidizes Complex III (Option B).

CoQ, which stands for coenzyme Q, plays a vital role in the electron transport chain (ETC). The CoQ receives electrons from Complex I in the form of NADH and becomes reduced. Reduced CoQ then moves to Complex III, where it donates these electrons, resulting in the formation of ubiquinol and the transfer of protons across the inner mitochondrial membrane. After this transfer, CoQ oxidizes Complex III and receives electrons to form a semi-reduced CoQ, which subsequently moves to Complex IV.

Your question is incomplete, but most probably your options were

A: CoQ is reduced by Complex I & later oxidizes Complex III

B: CoQ oxidizes Complex I & then is later oxidized by Complex III

C: CoQ reduces Complex I and later reduces Complex III

D: CoQ is oxidized by Complex I and is later oxidized by Complex III

Thus, the correct option is B.

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The molecular formula of the compound is (d) \(S_2O_6\).

The molar mass of a compound represents the mass of one mole of that compound. To determine the molecular formula, we need to find the ratio between the empirical formula and the molecular formula. The empirical formula gives the simplest whole-number ratio of atoms in a compound. In this case, the empirical formula is \(SO_2\), indicating that for every one sulfur atom, there are two oxygen atoms.

To find the molecular formula, we need to compare the molar mass of the empirical formula with the given molar mass of the compound. The molar mass of the empirical formula \(SO_2\) can be calculated by adding the atomic masses of sulfur (S) and oxygen (O):

Molar mass of \(SO_2\) = (32.07 g/mol for S) + (2 × 16.00 g/mol for O) = 64.07 g/mol.

Since the molar mass of the empirical formula matches the given molar mass of the compound, the empirical formula is also the molecular formula. Therefore, the molecular formula of the compound is \(S_2O_6\).

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Measured value 28.7053 cm, which has six significant figures . Round the measurement to four significant figures is 28.71 cm

To count the significant number there are some rules to follow are :

Thus, Measured value 28.7053 cm, which has six significant figures . Round the measurement to four significant figures is 28.71 cm

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The first location of chemical and mechanical digestion is the stomach. This statement is false.

Digestion is the breaking down of large insoluble food molecules into smaller water-soluble food molecules so that they can be absorbed into the aqueous plasma. In certain organisms, these small substances are absorbed from the small intestine into the bloodstream. Digestion is important for breaking down food into nutrients that the body uses for energy, growth, and cell repair that it needs to survive.

The digestive system has many forms. A basic distinction is made between internal and external digestion. External digestion evolved early in evolutionary history, and most fungi still rely on it. During this process, enzymes are secreted into the organism's environment, where organic substances are decomposed and some of the products diffuse back into the organism. Animals have a tube (alimentary canal) where internal digestion takes place. This is more efficient as more decomposition products can be trapped and the internal chemical environment can be more effectively controlled.

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Answer:   The final stage of the life cycle of a tree is when it has fully grown and reached the ... You should be confident in your supplier's approach to sustainability. ... This is the first occasion you will see a stem and perhaps a couple of leaves. ... The next phase is the sapling stage, this is when the sprout continues to grow and has ...

Explanation:

Answer:

70000 cm in 7km

Explanation:

There are 1000 m and 100 cm in 1 m in 1 km, so to find how many cm are in 7 km you need to do 10000 x 7.  You get 70000

Have a nice day!

Answer:

700000cm

Explanation:

1 km consists of 1000m and 1 m consists of 100 cm so 7×1000×100=700000cm

Answer:

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.

Explanation:

Answer:

a

Explanation:

Warm air and water both tend to rise while cooler air and water sink different parts of the oceans are heated unevenly, this causes the water to move in convection currents.

A stream of charged particles, such as electrons or ions, traveling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control container is how it is calculated.

Magnetic fields are produced by electric currents and are applied in motors, generators, inductors, and transformers. They result in Joule heating in conventional conductors, which lights up incandescent light bulbs.

Electromagnetic waves produced by time-varying currents are utilized in communications to transmit information.

Thus, option A is correct.

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CH4 is limiting reagent and H20 remains after the reaction.

A limiting reagent is a reactant that entirely consumes itself before any other reactants are used up in a chemical reaction, hence restricting the amount of product that may be created. It can be found by comparing the proportions of each component in the reaction and its stoichiometry. Once the limiting reagent has been determined, the amount of product that can be generated can be computed using the reaction's stoichiometry.

\(CH_4+2O_2- > CO_2+2H_2O\)  

number of moles of CH4= given mass/atomic mass

=> 16/16

so the number of moles of CH4 is 1

number of moles of O2 = 64/32

=2

so CH4 1 mole get vanished after the reaction and the gases like CO2 and O2 fly away so the limiting reagent is CH4  

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Total positive charge in 1.80 kg of plutonium is 13365,04 x 10^4 C

Solution:

1 mole of plutonium = 244 gm

3.6 kg of plutonium = 3.6 x 1000 = 3600 gm

Number of moles = 3600/244 = 14.754 moles

One moles of plutonium contains protons 6.023 x 10^23 x 94

Total number of protons in 14.754 moles = 6.023 x 10^23 x 94 x 14.754

                                                                    = 8353.15 x 10^23

Total Positive charge = 8353.15 x 10^23 x 1.6 x 10^-19

Total positive charge = 13365,04 x 10^4 C

The mole, represented by the symbol mol, is the fundamental SI unit of material quantity. The amount of a substance determines how many elementary entities of that substance are present in an object or sample. Since the SI fundamental units were revised in 2019, the mole is now exactly defined as 6.022140761023.

The amount of a substance determines how many elementary entities of that substance are present in an object or sample. Since the SI fundamental units were revised in 2019, the mole is now exactly defined as 6.022140761023.

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Answer:

1250000

Explanation:

Specific heat is mass times specific heat capacity times change in temperature to get chance in temperature minus the old temperature from the new temperature then complete equation hence 25g×1000j×(60-10)

25g×1000j×50

=1250000g/j/degree Celsius

If the bond angle between two adjacent hybrid orbitals is 109.5°, the hybridization is sp³. ore about

The hybridization is sp³ for the  bond angle between two adjacent hybrid orbitals is 109.5°. the electrons groups are involved in this process. the four orbitals involves in the sp³ hybridization , the one s orbital and the p orbitals are involve and the hybrid orbital is formed is as sp³ hybridization. the geometry is tetrahedral. the example of the  sp³ is the methane.

Thus, for the sp³  hybridization  the  bond angle between two adjacent hybrid orbitals is 109.5° and the geometry is tetrahedral.

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Answer:

gas vibrate and move freely at high speeds. liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.

Hopefully this helped!

Answer:

H20 because u can touch it

An option that correctly represents a chemical element is known as hydrogen. Thus, the correct option for this question is D.

A chemical element may be defined as a type of substance that can't be broken down into its simpler form by non-nuclear reactions. It is generally composed of a species of atoms that have a given number of protons in their nuclei.

According to the context of this question, water is a compound because it is made up of water molecules. Water molecules are made up of atoms of hydrogen and oxygen. Sodium chloride is also a chemical compound because it is also made of atoms of sodium and chlorine.

Therefore, an option that correctly represents a chemical element is known as hydrogen. Thus, the correct option for this question is D.

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Answer:

1995,33.7

Explanation:

The points is an outlier on the graph is 1992, 45.4 thousand.

So, option D is correct one.

In the given graph we can observe that all data are plots on the line like  1999, 18.7 thousand , 1995, 33.7 thousand and 1990, 37.5 thousand except  1992, 45.4 thousand which is out of the line.

The data can be represented by different types of graphs.There are many types of graphs, some are given below.

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The density of 55.3 lbs/ft³ is 0.884 g/mL.

To convert density from pounds per cubic foot (lbs/ft³) to grams per milliliter (g/mL), we can use the following conversion factors:

1 pound = 453.59237 grams

1 foot = 30.48 centimeters (cm)

1 inch = 2.54 centimeters (cm)

1 milliliter (mL) = 1 cubic centimeter (cm³)

First, we convert pounds to grams:

55.3 lbs = 55.3 lbs * 453.59237 g/lb = 25050.364 grams

Next, we convert cubic feet to milliliters:

1 ft³ = (30.48 cm)³ = 28316.8466 cm³

1 cm³ = 1 mL

Finally, we calculate the density in g/mL:

Density = (25050.364 g) / (28316.8466 mL) ≈ 0.884 g/mL

Therefore, the density of 55.3 lbs/ft³ is approximately 0.884 g/mL.

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The relative changes in concentration of the substances involved in an equilibrium as the system equilibrates can be determined by looking at the: C. Stoichiometry of the equilibrium

C. Stoichiometry of the equilibrium. The relative changes in concentration of the substances involved in an equilibrium as the system equilibrates can be determined by looking at the stoichiometry of the equilibrium, which tells us the ratios in which the reactants and products are consumed and produced.

This allows us to predict how the concentrations of the substances will change as the equilibrium is established.

The temperature and pressure of the system may also affect the equilibrium, but they do not directly determine the relative changes in concentration of the substances.

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First, let's remember the formula to calculate an object's density:

Then, we analyze what we have:

We need to determine the volume, so we transform our formula like this:

We replace our data:

Then, the answer is that the volume equals 12.4 cm^3.

The reactivities of tert-butyl bromide and 2-bromopropane are related to the stabilities of the carbocations produced as intermediates in the reaction in several ways.

First, it is important to note that tert-butyl bromide has an electron-withdrawing group (carbonyl) attached to its aromatic ring. This makes it more reactive than 2-bromopropane because it is easier for tert-butyl bromide to achieve a favorable resonance structure.

Second, it is also important to note that tert-butyl bromide has a more stable carbocation intermediate than 2-bromopropane because it has a larger number of bonds between carbon atoms. This means that these bonds take longer to break apart during the transition state, which makes it harder for tert-butyl bromide's intermediate to form.

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Answer:

if you are asking for the chemical reaction:

Ca(OH)2 + H3PO4-------> Ca3(PO4)2 + H2O

Explanation:

In this reaction, phosphoric acid, H3PO4 , a weak acid, will react with calcium hydroxide, Ca(OH)2 , a strong base, to produce calcium phosphate, Ca3(PO4)2 , an insoluble salt, and water.

87.2 grams of phosphine can form when 47.2 g of phosphorus and 85.8 l of hydrogen gas react at stp.

To solve this problem, we need to use the balanced chemical equation for the reaction between phosphorus and hydrogen gas to form phosphine:

\(P_4\) + \(6H_2\)  → \(4PH_3\)

From the equation, we can see that 4 moles of \(PH_3\)  are formed for every mole of\(P_4\) that reacts. We can use the molar volume of a gas at STP (22.4 L/mol) to convert the given volume of \(H_2\) gas to moles.

First, let's calculate the number of moles of hydrogen gas:

n(\(H_2\)) = V(STP) / V(molar) = 85.8 L / 22.4 L/mol = 3.84 mol

Next, we can use the stoichiometry of the balanced equation to determine the number of moles of phosphine produced:

n(\(PH_3\)) = n(\(H_2\)) x (4 mol \(PH_3\) / 6 mol \(H_2\) ) = 3.84 mol x 4/6 = 2.56 mol

Finally, we can use the molar mass of \(PH_3\) to convert the number of moles to grams:

m(\(PH_3\)) = n(\(PH_3\)) x MM(\(PH_3\)) = 2.56 mol x 34.02 g/mol = 87.2 g

Therefore, 87.2 grams of phosphine can form.

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Answer:

You can find how many valence electrons an atom has by looking at what group the element is in. For example, oxygen is in group 6... so therefore, it has 6 valence electrons.

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The formula contains : C. 1 nitrogen atom, 4 hydrogen atoms, and 1 chlorine atom

Given

NH₄Cl compound

Required

The number of atoms

Solution

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.

A molecular formula is composed of two or more elements formed of the same or different types.

A subscript indicating the number of atoms forming a molecule

So for NH₄Cl , there are 3 different elements, N, H and Cl, and the number is shown from the subscript

The concentration of a solution does not change in the same way if you use a solid or liquid to add solute.

When adding a solid solute to a solvent, the concentration of the solution increases in a predictable and proportional manner, while adding a liquid solute to a solvent can result in a non-linear change in concentration. This is because the volume of the solution changes when a liquid solute is added, which can affect the concentration.

To illustrate this with a common example, consider table salt. When you add table salt to water, the concentration of the solution increases proportionally to the amount of salt added. However, if you add a liquid like vinegar to water, the volume of the solution increases more than the concentration, since the vinegar takes up space in the solution but does not add a proportional amount of solute.

In conclusion, the type of solute added to a solvent can affect the concentration of a solution, and this is important to consider when making solutions or analyzing their properties.

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Answer:

If you see in the image above, there is an unbalance force applied while playing tug of war. Since it is 1 vs 2, there is a greater net force in the right side then the left side. If it was 2 vs 2 or 1 vs 1, then they are appling balance force. You can also see in the picture that the arrows are pointing outwards (--->) rather then inwards (<---) because you are pulling the rope not pushing the rope. If you add one person on the left side, then the newtons which is 20N will become to 35N and will be balanced, but since there in only 1 person, there is less force on the left side, the newtons gets subtracted having only 20N. Since you are pulling the rope, the friction is opposite (<---). Since you are pulling the rope, you are using Kinetic force and the rope stays in potential force since it stays constant.

Hope this helps, thank you :) and I am not sure about magnitude I think you can that since there is greater force on the right side, there is more magnitude there.

Explanation:

hope the picture above help u understand I did it in step so it would be easier to understand:)