Which of the following has mechanical energy? (5 points)
Car battery
Compressed spring
Glowing incandescent lightbulb
Nucleus of uranium atom

Answer:

Explanation:

q=mcat

q= 50g(4.184)(100-100)

q = 0

The mass of an object in a given space is known as its relativistic mass.

The system's mass as it will be determined by a scale just might be the relativistic mass, however, in some instances (such as the box above), this fact only holds true since this system must typically be at rest in order to be measured .

For instance, if an electron in such a cyclotron is traveling in circles at a relativistic velocity, its relativistic mass rather than its rest mass increases the mass of the cyclotron and electron system.

Therefore, The mass of an object in a given space is known as its relativistic mass.

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Answer:

Initial velocity (u) = 0 m/s

Final velocity (v) = 60 m/s

Time (t) = 7 sec

Acceleration (a) = ?

a = (v-u)/t

a = (60-0)/7

a = 60/7

a = 8.57 m/s²

Balanced Equation: CaSiO3 + 2 CO2 + H2O = Ca(HCO3)2 + SiO2

One or more chemical substances can react with each other and form one or more new substances through a process which is referred to as chemical reaction.

Reactants are the elements required for a reaction's initialization.

The components that remain after a reaction are called products.

Each kind of atom is to be present on both the reactant and product side of a chemical equation in a chemical reaction in order for it to be balanced.

On both sides of balanced chemical equations, the same number and type of each atom can be found.

A balanced chemical equation must have coefficients that are the smallest whole number ratio.

Mass is always conserved in chemical processes.

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Cis- and trans-2-butene can both be hydrogenated to butane; thus their energies can be compared. the trans isomer releases less energy upon hydrogenation therefore cis-2-butene higher in energy.

The process of addition of hydrogen atom to another compound in the presence of catalyst such as nickel, cobalt etc. is termed as hydrogenation process.

As in trans- isomer, similar atoms or group of atoms are on opposite side. Due to which there is less repulsion between the atoms which results in more stability of trans isomer. On the other hand in cis- isomer, similar atoms or group of atoms are on same side, due to which there is more repulsion between the atoms which results in less stability of cis-isomer.

Due to more stability of trans- isomer less energy is released to add hydrogen to the trans butene as compared to cis butene for the formation of butane.

Thus we concluded that the trans isomer releases less energy than cis isomer in hydrogenation process.

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Answer:

735,000

Explanation:

75 × 9.8

None of the above.

The energy difference between two energy levels in the hydrogen atom is given by the equation:

ΔE = E₂ - E₁ = -R_H(1/n₂² - 1/n₁²)

where ΔE is the energy difference, E₂ and E₁ are the energy levels, R_H is the Rydberg constant, and n₂ and n₁ are the principal quantum numbers.

In this case, the photon with a wavelength of 122 nm can excite the electron from n=1 to n=2. To determine if other photons can also excite the electron to the same level, we can use the equation:

λ = c / ν

where λ is the wavelength, c is the speed of light, and ν is the frequency of the photon.

Using the given wavelength values, we can calculate the corresponding frequencies and then determine if the energy difference matches the required energy to excite the electron from n=1 to n=2.

Calculating the frequencies and energy differences for the given wavelengths, we find:

For 244 nm:

ν = c / λ = (3.00 x 10^8 m/s) / (244 x 10^(-9) m) ≈ 1.23 x 10^15 Hz

ΔE = E₂ - E₁ = -R_H(1/n₂² - 1/n₁²) = -R_H(1/2² - 1/1²) = -R_H(1/4 - 1) = 3/4 R_H

For 61 nm:

ν = c / λ = (3.00 x 10^8 m/s) / (61 x 10^(-9) m) ≈ 4.92 x 10^15 Hz

ΔE = E₂ - E₁ = -R_H(1/n₂² - 1/n₁²) = -R_H(1/2² - 1/1²) = -R_H(1/4 - 1) = 3/4 R_H

For 94 nm:

ν = c / λ = (3.00 x 10^8 m/s) / (94 x 10^(-9) m) ≈ 3.19 x 10^15 Hz

ΔE = E₂ - E₁ = -R_H(1/n₂² - 1/n₁²) = -R_H(1/2² - 1/1²) = -R_H(1/4 - 1) = 3/4 R_H

Conclusion:

None of the calculated energy differences match the required energy difference to excite the electron from n=1 to n=2, which is 3/4 R_H. Therefore, none of the given wavelengths can be used to excite the electron from n=1 to n=2.

None of the above statements are true. The given wavelengths cannot be used to excite the electron from n=1 to n=2 in hydrogen.

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Answer:

Coffee Filter.

Tea-bags.

Water Filters.

Sand Filtration.

HEPA Air Filters.

Automotive Filters.

Belt Filters.

Dialysis.

Explanation:

Answer:

Yes, oil is a non renewable energy source

Explanation:

Because once these resources are used up, they cannot be replaced.

Answer:

yes its a nonrenewable resource because once you use it you cant put it back

Explanation:

Answer:

(Rounded to SigFigs)

A. 8.14 * 10^23 Molecules CS2

B. 1.53 * 10^23 Molecules As2O3

C. 7.53 * 10^23 Molecules H2O

D. 9.0 * 10^25 Molecules HCl

Explanation:

To determine the number of molecules in a given amount of substance (in moles), you can use Avogadro's number, which is approximately 6.022 × 10^23 molecules/mol.

a. 1.35 mol carbon disulfide:

Number of molecules = 1.35 mol × (6.022 × 10^23 molecules/mol) = 8.1437 × 10^23 molecules

b. 0.254 mol As2O3:

Number of molecules = 0.254 mol × (6.022 × 10^23 molecules/mol) = 1.530988 × 10^23 molecules

c. 1.25 mol water:

Number of molecules = 1.25 mol × (6.022 × 10^23 molecules/mol) = 7.5275 × 10^23 molecules

d. 150.0 mol HCl:

Number of molecules = 150.0 mol × (6.022 × 10^23 molecules/mol) = 9.033 × 10^25 molecules

In the image attached, you can see how Mols cancels out and you're left in molecules instead using the train track method.

Hope this helps!

Answer:

tendinitis.

carpal tunnel syndrome.

osteoarthritis.

rheumatoid arthritis (RA)

fibromyalgia.

bone fractures.

Answer:

48.018 g/mol

Explanation:

Answer:

The molar mass and molecular weight of CH2O2 is 46.025.

Explanation:

Answer:

The parts of an atom are protons, electrons, and neutrons.

A proton is positively charged and is located in the center or nucleus of the atom.

Electrons are negatively charged and are located in rings or orbits spinning around the nucleus.

The number of protons and electrons is always equal.

Answer:

protons, electrons, and neutrons.

A proton is positively charged and is located in the center or nucleus of the atom.

Electrons are negatively charged and are located in rings or orbits spinning around the nucleus.

The number of protons and electrons is always equal.

Explanation:

The given statement "the physical state of a reactant or product will affect the enthalpy of reaction in a thermochemical equation," is false.

The heat of reaction is influenced by the physical state of the reactants and products.

The term "thermochemical equation" refers to a balanced chemical equation that not only specifies the quantities of the various reactants and products but also the quantity of heat generated or absorbed.

A thermochemical equation may be written using fractional coefficients.

H2 ( g ) + ½ O2 ( g ) ⇒H2O ( l ) +285.8 KJ mol-1

H2 ( g ) + ½ O2 ( g ) ⇒ H2O ( l )  ΔH = – 285.8 KJ mol-1

When 1 mole of hydrogen and 0.5 mole of oxygen react, 285.8 KJ mol-1 of heat is produced. The heat generated will also double if the reactant amounts are doubled.

2H2 ( g ) + O2 ( g ) → 2 H2O ( l ) + 571.6 KJ mol-1

2H2 ( g ) + O2 ( g ) → 2H2O ( l ) ,ΔH = – 571.6 KJ mol-1

The heat of reaction, enthalpy of reaction, or enthalpy change of reaction is the quantity of heat that is evolved or absorbed in a chemical reaction once the number of moles of reactants as represented by the chemical equation have completely reacted.

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The formation of the enzyme-substrate complex stressed/distorts chemical bonds to form a transition state, making the substrate more reactive and accelerating the reaction.

When the enzyme binds to the substrate, it creates an environment that is conducive to the formation of the transition state, which is the intermediate state between the substrate and the product. The enzyme stabilizes the transition state by creating an environment that is conducive to its formation, which reduces the activation energy required for the reaction to occur. This makes the substrate more reactive, allowing it to form the product more quickly than it would without the enzyme.

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Answer:

im not sure

Explanation:

B

The sodium hydroxide (NaOH) solution is a basic solution, so the pH of that solution should be close to 14

then when adding hydrochloric acid (HCl) we start to neutralice the solution, meaning the pH must sift slowly to lower pH.

Assuming both solutions have similar concentration the pH shall shift form basic (above 7) to acid pH (below 7). Until now both B and D images agreed with the explanation given. To chose between them we need to remember that HCl is a very strong acid, which means that in solution will get to very acid solutions (very low pH values) which leaves only B as possible answer

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 organic compounds that are divided into two types, simple and complex, are called carbohydrates.

Carbohydrates are diveded into twy types: simple and complex (starches, fiber, glycogen).

Simple carbohydrates are made of one (monosaccaharides) or two sugar units.

Complex carbohydrates are made up of many sugar units.

For example, glucose (C₆H₁₂O₆) is a simple carbohydrate.

Glucose is chemical compound composed of six carbon atoms, twelve hydrogen atoms and six oxygen atoms.

Starch is a polymeric carbohydrate consisting of a large number of glucose units bonded by glycosidic bond. Starch is a white, tasteless and odorless powder that is insoluble in cold water or alcohol.

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Balanced equation for Grignard reaction:

2-bromopropane + Mg → MgBr₂ + CH₃CHBrMgBr (Grignard reagent)

Synthesis of 1-(4-methoxyphenyl)-2-methylpropan-1-ol from Grignard reagent and 4-methoxybenzaldehyde:

CH₃CHBrMgBr + 4-methoxybenzaldehyde → 1-(4-methoxyphenyl)-2-methylpropan-1-ol

The Grignard reaction involves the reaction of an alkyl or aryl halide with magnesium in the presence of anhydrous ether to form a Grignard reagent. In this case, 2-bromopropane reacts with magnesium to form the Grignard reagent CH₃CHBrMgBr.

The Grignard reagent can then react with an aldehyde or ketone to form an alcohol. In this case, the Grignard reagent reacts with 4-methoxybenzaldehyde to form 1-(4-methoxyphenyl)-2-methylpropan-1-ol.

The reaction mechanism involves the attack of the Grignard reagent on the carbonyl group of the aldehyde, followed by protonation and elimination of the ether molecule to form the alcohol. Overall, the Grignard reaction is an important tool in organic synthesis for forming carbon-carbon bonds and creating complex organic molecules.

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so the other guy can have branliest have a wonderful summer guys! :)

If a urine sample is distinctly yellow in color, the correct answer is (c) it will have a high pH. The color of urine is influenced by many factors, such as diet, hydration status, and the presence of certain diseases or medications.

However, urine that is yellow or dark yellow in color usually indicates that the person is dehydrated, as the kidneys are retaining more water to maintain fluid balance in the body. The pH of normal urine ranges from 4.6 to 8.0, with an average of 6.0. A high pH in urine can be caused by a number of factors, including certain medications, urinary tract infections, or metabolic disorders. A high pH in urine can lead to the formation of kidney stones, which can be painful and require medical treatment. It is important to consult a healthcare provider if there are concerns about the color or pH of urine.

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As per the given reaction one mole of magnesium hydroxide reacts with 2 moles of potassium metal to give one mole of Mg. Therefore, 12 moles of potassium reacts to give 6 moles of Mg metal.

In a displacement reaction, one element or group is displaced from the reactant by the other reactant. The given reaction is an example of single displacement reaction.

As per the balanced chemical equation of the reaction, 1 mole of magnesium hydroxide reacts with 2 moles potassium metal to form one mole of Mg metal and 2 moles of potassium hydroxide.

Here, 12 moles of potassium is taken. Then, the number of moles of Mg metal formed is just half the number of moles of K. That is 6 moles of magnesium metal.

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The reaction related to your question is given below:

Mg(OH)₂ + 2K ⇒2KOH + Mg

It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

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The given gas has a volume of 1.98 L at STP, which means it is at a temperature of 0°C (273.15 K) and a pressure of 1.00 atm. To calculate the number of moles of gas present, we need to use the STP conditions.

First, we can calculate the number of moles of gas present at STP using the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. At STP, P = 1 atm, V = 22.4 L (the molar volume at STP), R = 0.08206 L atm mol^-1 K^-1, and T = 273.15 K.

Plugging in the values, we get:

1 atm x 22.4 L = n x 0.08206 L atm mol^-1 K^-1 x 273.15 K

n = (1 atm x 22.4 L) / (0.08206 L atm mol^-1 K^-1 x 273.15 K)

n = 1.00 mol

This means that 1 mole of the gas occupies 22.4 L at STP.

Now, we can use the number of moles to find the mass of the gas present. The given mass is 2.66 g, so:

mass = n x molar mass

where molar mass is the mass of one mole of the gas. Let's assume the gas is an ideal gas, and use the ideal gas equation to calculate its molar mass:

PV = nRT

n = PV / RT

n = (1 atm x 1.98 L) / (0.08206 L atm mol^-1 K^-1 x 273.15 K)

n = 0.0878 mol

Now we can calculate the molar mass:

molar mass = mass / n

molar mass = 2.66 g / 0.0878 mol

molar mass = 30.31 g mol^-1

Therefore, the gas has a molar mass of 30.31 g mol^-1.

Note that the appropriate units for volume are liters (L), and for pressure are atmospheres (atm). The appropriate units for mass are grams (g), and for molar mass are grams per mole (g mol^-1).

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Answer:

In the periodic table of the elements, it is expected to be an s-block element, an alkali metal, and the first element in the eighth period. It is the lightest element that has not yet been synthesized.

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