How many joules are needed to change the temperature of 40 g of water from 33 0C to 23 0C?

Answers

Answer 1
-1680J I think sssssssssssss

Related Questions

At the end of the diffusion process, the concentration of substances on each side is.

Answers

At the end of the diffusion process, the concentration of substances on each side is. equal. This is because the diffusion process causes the substances to move from areas of high concentration to areas of low concentration until they are evenly distributed.

What is concentration?
Concentration
in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molarity, number concentration, as well as volume concentration are four different categories of mathematical description. Any type of chemical mixture can be referred to by the term "concentration," but solutes as well as solvents in solutions are most frequently mentioned. There are different types of molar (amount) concentration, including normal concentration as well as osmotic concentration. The word "concentration" is derived from the French verb "concentrer," which means "to put at the centre" and comes from the root con-.

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A sports car has a mass of 1500 kg and accelerates at 5.0 m/s2. What is the magnitude of the force acting on the sports car?
F=ma
A. 300 N
B. 1500 N
C. 2250 N
D. 7500 N

Answers

The magnitude of the force acting on the sports car is 7500N.

How to solve?

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Net Force = Mass × Acceleration,

or F = m × a.

F= 1500 kg x 5m/s^2

F = 7500N.

How do you determine acceleration?

According to the equation a = v/t, acceleration (a) is the product of the change in velocity (v) and the change in time (t). In terms of meters per second squared (m/s2), this enables you to calculate how quickly velocity varies.

How is momentum calculated?

p = m v . The equation shows that the relationship between momentum and an object's mass (m) and speed is linear (v). The larger an object's mass or velocity, the greater its momentum will be as a result.

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If you combine 400.0 mL
of water at 25.00 ∘C
and 100.0 mL
of water at 95.00 ∘C,
what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

Answers

Therefore, the final temperature of the mixture is 43.15 C.

What is Temperature?

The term "temperature" refers to a measurement of an object's average kinetic energy, which is a category of energy linked to motion and used to describe how hot or cold an object is. But how hot and how frigid are they exactly? Hot and cool are not really scientific concepts.A physical scientist would check the metal's liquid state's temperature to find the answer. It is less confusing to use temperature instead of phrases like hot or cold.

Let the mixture's final temperature be toC (clearly, 95.00 oC > t oC > 25.00 oC).

Cold water sample's mass is equal to (volume times density) or (400 mL times 1.00 g/mL) = 400 g.

Water has a specific heat capacity of 4.184 J/g.

Heat gained by cold water equals mass times the water's specific heat capacity times the temperature change.

= (400g) x (t - 25) C x (4.184 J/g)

Hot water sample mass equals 140 g (140 mL x 1.00 g/mL).

Heat lost by hot water is calculated as (140 g) x (4.184 J/g. C) x (95 - t) C.

400 ( t - 25 ) = 140 ( 95 - t)

400 t - 10000 = 13300 - 140t

540t = 23300

t = 43.15

Therefore, the final temperature of the mixture is 43.15 C.

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Some nuclear power plants use plutonium-239, which is produced in breeder reactors. the rate-determing step is the second β- emission. How long does it take to make 3.00 kg of 239pu if the reaction is complete when the product is 91.5 % 239pu?

Answers

To make 1.00 kg of ²³⁹Pu if the reaction is complete when the product is 90% ²³⁹Pu the time period is 0.357 days.

Definition of power plants

Power station is defined as an industrial facility for the production of electricity, sometimes known as a power plant, generating station, or generating plant. In most of the cases, power plants are wired to form a grid.

Half life of ²³⁹Pu is 2.35 days

K = ln2/t₀.₅

  = ln 2/ 2.35

K = 0.294956/ day

N₀ = 1 kg

Nₐ = 0.91kg

K = 1/t ln N₀/ Nₐ

t = 1/K ln(N₀/Nₐ)

t = 0.357 days

Hence, the time period is 0.357 days.

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Rihanna tested two different foods using iodine solution and Benedict's s-
Solution
These were her results.
spaghetti - went blue-black with iodine solution, went blue
with
Benedict's solution
honey - went orange-brown with iodine solution, turned brick red
with Benedict's solution
Describe how Rhianna tested the foods with Benedict's solution.
Construct a results table and fill it in to show Rhianna's results clearl
What conclusions can Rhianna make from her results?

Answers

Answer:

*spaghetti is a starch...it doesn't contain sugar, but honey contains sugar.

*Starch gives blue-black with iodine solution and dark blue in Benedict's reagent

*benedict solution : add benedict reagent to a test tube, then heat it (it will turn yellow-greenish) and let it cool down, if the colour changes to red, then sugar its present.

*A positive test with Benedict's reagent is shown by a color change from clear blue to brick-red

* conclusion : Honey is a carbohydrate, and spaghetti is a starch

Explanation:

What do atoms consist of:____.
A. elements
B. compounds
C. charged and uncharged particles
D. neutrons moving around a nucleus

Answers

Answer: i think is D

Explanation:

A beaker contains a 25 ml solution of an unknown monoprotic acid that reacts in a 1:1 stochiometric ratio with naoh. Titrate the solution with naoh to determine the concentration of the acid.

Answers

The molarity of the acid is : 0.82 Molar

Calculate the molarity of acid?

Volume of acid = 25 ml

Molarity of base = 0.5 M

Volume of base = 41.00 ml

Since, acid and base reacts in 1:1 stoichiometric ratio, we can use the molar equivalence formula as:

M(acid) × V(acid) = M(Base) × V(Base)

M(acid) = 0.82 M

What is Molarity?

Molarity (M) is the amount of a substance in a given volume of solution. Molarity is defined as the number of moles of solute per liter of solution. Molarity is also called the molarity of a solution.

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Referring to the drawing to the right.the beaker contains a 5% salt solution and the bag contains a 15%salt solution in which direction will water move

Answers

According to the concept of diffusion the water will move from 5% salt solution to 15%salt solution.

What is diffusion?

Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.

There are 2 main types of diffusion:

1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.

2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.

There are 2 types of facilitated diffusion one is osmosis and dialysis.

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why does the substitution of ortho or para nitro groups onto chlorobenzene greatly increase the tendency of the chlorine to be displaced by nucleophiles?

Answers

As an electron-withdrawing group, the nitro group reduces the electron density over the benzene ring. Haloarenes are more reactive to nucleophlic substitution when nitro groups are present in the ortho or para position.

What are nucleophiles ?

A reactant known as a nucleophile provides an electron pair in order to create a covalent bond. Typically, a nucleophile has a negative charge or is neutral with one or two donateable electrons. Some examples include H2O, -OMe, or -OtBu. The species with a lot of electrons is a nucleophile overall.

A nucleophile is an atom or molecule that seeks the positive center of a chemical process, such as the atom's nucleus, since it has an accessible electron pair for bonding.

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Potassium iodide is an ionic compound. (i) describe what happens, in terms of electron loss and gain, when a potassium atom reacts with an iodine atom.

Answers

Iodine atoms gain electrons in this process, resulting in negatively charged iodide ions, while potassium atoms lose electrons, resulting in positively charged potassium ions. There is oxidation and reduction.

What does oxidation mean?

The oxidation status of the substrate can change during redox reactions. Similar to how losing electrons or increasing the oxidation state is oxidation while gaining electrons is reduction.

When oxygen comes into contact with a material or an element, an oxidation reaction occurs. Another way to look about oxidation is as the procedure through which the species of reactants lose their hydrogen. Oxidation is the loss of electrons in a molecule, an atom, or an ion.

Oxidation reactions produce new functional groups in molecules or change existing functional groups in molecules.

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Explain how water is an example of a molecule that forms because of polar covalent bonds.



( Need Answer ASAPP! 100 POINTSS!!!)

Answers

Water is an example of a molecule which forms polar covalent bonds simply because of shared electrons pairs between hydrogen and oxygen atoms.

How water is a polar covalent molecule

Water is a chemical compound which contains hydrogen and oxygen. The hydrogen is positive charged while the oxygen atom has a negative ion. Structurally, water has two different poles in its molecule; a positive side pole and a negative side pole.

That being said, one great quality, feature or characteristic which makes water a polar covalent molecule is by the virtue of unequal sharing of electrons.

So therefore, we can now confirm from the explanation given above that the polarity of water molecules makes it an excellent solvent for solutes.

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what happens to water with dextrose after a few days?

Answers

Since dextrose cannot be autoclaved and IV administration makes sterility essential, even if the solution may be chemically stable for months, the shorter BUD that will be utilized is 14 days according on USP sterility requirements.

What do you mean by Dextrose ?

A basic sugar, glucose has the chemical formula C6H12O6. The most prevalent monosaccharide, a type of carbohydrate, is glucose.

(Dextrose dextrorotary glucose), a monosaccharide made from corn, is frequently referred to as "corn sugar" in commerce. It is additionally called glucose. A very refined white sugar, corn sugar has no corn (maize) flavor. Hexose-type sugar glucose contains a group of six carbon atoms.

A simple sugar derived from corn or wheat with the term dextrose is chemically equivalent to glucose, or blood sugar. Dextrose is a typical sweetener used in baked products and is present in things like processed foods and corn syrup.

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Which body systems within marching band members are interacting so they can play their instruments while walking in the parade? List the systems below.

Answers

Squirrel: Digestive, Circulatory, Muscular, and Nervous systems.

Soccer: Skeletal/muscular, circulatory, respiratory, and body systems.

What is body systems?

For Squirrel:

The digestive system functions to break food down into smaller pieces that are more suitable for swallowing and absorbing the available nutrients. It transports to various cells of living organisms.

musculature allows animals to keep their balance on branches and avoid falling.

The nervous system controls all living things. The nervous system controls all physical activity. Among many other functions, it is involved in maintaining balance and maintaining alertness during meals.

Soccer player:

This person is trying to hit the ball to score a goal. He seems to be adjusting his arms and legs to allow this.

The muscular and skeletal systems work together to support and strengthen the body. They allow the movement of the whole body to reach the target.

The respiratory system is also involved in this person's running performance. He has to breathe constantly to get enough oxygen while running and exhaling exhaust fumes.

The circulatory system transports oxygen to various cells in the body that use it on demand, especially muscle cells. The system also removes waste.

The nervous system controls all physical activity. It performs a variety of functions, including maintaining balance and coordination while running, alerting other players and focusing on the ball, and controlling a player's thoughts and strategies during the game.

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C2h4+3o2——>2co2+2h2o enthalpy

Answers

♧ For the reaction

C2H4(g)+3O2→2CO2(g)+2H2O(l); ΔU=−1415kJ.

the pka of acetic acid (hc2h3o2) is 4.8. if you make a buffer that contains 0.1 m hc2h3o2 and 0.2 m nac2h3o2, what is the approximate ph of the solution?

Answers

Solutions Buffer. pH of solution is adjusted by adding 0.10 M HCl to 100 mL of water. A buffer aids in pH maintenance while adding M NaCH. 3. COO (sodium acetate) (sodium acetate).

How do I figure out pKa?

The negative log of the Ka is known as the pKa. All we would need to do is take the Ka and the negative log of it in order to determine the pKa for methanol. Therefore, the pKa is equal to the negative log of 2.9 x 10 16 .

How is pKa determined from pH?

There are distinct Ka and pKa values for each dissociation. The weak acid and its conjugate base are present in equal amounts when the moles of base added are half that of the total moles of acid. CB/WA is equal to 1, and the HH equation states that pH = pKa + log(1) or pH = pKa.

Calculation:

0.10 M HCl to 100 mL of water

pKa for methanol = 2.9 x 10 16 .

pH = pKa + log(1) or pH = pKa.

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after conducting stable-isotope analysis of an ice core, you record a high level of 18o relative to 16o at a particular layer. what does this suggest about the climate at this time?

Answers

The climate was relatively warm.

In a spectrophotometer, both absorbance and transmittance indicate choose. Passing through a sample. A high absorbance corresponds to a choose. Transmittance.

Answers

The light is passed through a sample solution some amount of light is absorbed and the rest is transmitted, according to Beer-lambert's law, in the spectrophotometer.

What is Spectrophotometer?

A spectrometer is a biological instrument that determines the concentration of a solute in a solution by measuring the amount of light that passes through a solution.

What is Beer-lambert's law?

The fundamental idea behind this is to determine the transmittance of light. The amount of light absorbed is inversely proportional to the amount of light transmitted, which is why this phenomenon is also known as the Beer-Lambert law since some light is absorbed and the remainder is transmitted when it passes through a sample solution.

Hence, the light is passed through a sample solution some amount of light is absorbed and the rest is transmitted.

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Determine the empirical formula of a compound containing 0.928 g of gallium and 0.412 g of phosphorus.

Answers

Empirical formula of a compound can be determined using their number moles in the given weights. Thus number of moles of both gallium and phosphorous are 0.013 . Thus, empirical formula of this composition is GaP.

What is empirical formula?

Empirical formula of a compound is derived from the number of moles of each element present in the compound. It will be different from the molecular formula of the compound.

Atomic mass of phosphorous = 31 g/mol

Atomic mass of gallium = 69.72 g/mol

Number of moles of 0.412 g of P = 0.412 g/31 g = 0.013.

No.of moles in 0.928 g of Ga = 0.928 / 69.72 = 0.013.

The ratio of their number of moles = 0.013 :0.013 = 1 :1.

Therefore, the empirical formula of the compound containing 0.928 g of gallium and 0.412 g of phosphorus is GaP.

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one or more substances are changed or converted into other substances during reactions.

Answers

A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.

What does the term chemical equation mean?

A chemical equation is a formula that lists the reactants and products of a chemical process. The reactants are to the left of the arrow, and the products are to the right. They will always be written in the same manner as a mathematical equation, from left to right. On occasion, a symbol will appear above or below the arrow to denote a prerequisite for the response to proceed. Products are the end result of chemical reactions that either break down an existing substance or create a new one. For instance, you can create edible table salt by combining solid sodium and gaseous chlorine (NaCl). This reaction is very flammable and produces a lot of heat (exothermic reaction).

Hence, chemical reaction is the process.

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Given 5.67 x 1023 molecules of NaF, how many moles are present?

Answers

Answer:

a

Explanation:

If you know your speed and how long you have been traveling, then you can calculate your dsitance with the formula

Answers

Speed is calculated as follows: speed = distance x time. Knowing the units for distance and time is necessary to determine the units for speed. Then distance = speed/time.

What is distance?

The distance traveled must be divided by the amount of time spent traveling in order to calculate speed. Divide the distance by the speed to calculate the time. Add the speed and the time together to get the distance. These equations can be seen as s=d/t when speed, distance, and time are all given.

The distance formula, d = st, or distance equals speed times time, can be used to calculate distance. Speed and rate are comparable because they both denote a certain amount of travel per unit of time, such as miles per hour or kilometers per hour. If speed s is equal to rate r, then r = s = d/t.

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In order to break down 3 glucose molecules and convert this into energy, how many oxygen molecules o2 do you need to breathe in?

Answers

In the process of respiration, 1 molecule of glucose requires 6 molecules of oxygen so 3 molecules of glucose will require 18 molecules of oxygen.

What is respiration?

Respiration is defined as a metabolic process which takes place in cells of living organisms in order to obtain energy by taking oxygen and liberating carbon dioxide .

Energy is produced by break down of glucose by reacting it with 6 molecules of oxygen , so in order to breakdown 3 molecules of glucose 3×6/1= 18 molecules of oxygen are required.

Thus,18 molecules of oxygen are required to be breathed in in order to break down 3 glucose molecules.

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decomposition of ni3 produces nitrogen gas and iodine. how many grams of the reactant would be required to react completely to give 2.49 g of the iodine?

Answers

It would take 8.26 g of the reactant in grams.

NI3 breaks down into 2 NI3 (s) ——————————> N2 (g) (g) It is evident from the chemical equation that 761.4 g of iodine is obtained from = 789.4 g of NI3 when the following conditions are met:.......... +..................... 3 I2 (g) 2 mol..................................1 mol.........................................3 mol 2 x 394.7 g/mol..............28 g/mol....................................3 x 253.8 g/mol

As a result, the formula yields 7.97 g of iodine: = 789.4 g x 7.97 g / 761.4 of NI3 = 6291.518 / 761.4 of NI3 = 8.26 g of NI3; therefore, 8.26 g of the reactant would be needed.

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kiki makes a table to compare the particles in a magnesium atom to those in a magnesium ion. a 3 column table with 3 rows. the first column is not labeled but have entries protons, neutrons, electrons. the second column is labeled magnesium atom with entries 12, 12, 12. the last column is labeled magnesium ion with entries x, y, z. she knows that a magnesium ion has an electric field that points away from the ion. what values should she use to complete her table?

Answers

The neutral magnesium atom has 12 protons, 12 neutrons, and 12 electrons.Ten electrons, twelve protons, and twelve neutrons make up the magnesium ion.

Protons, neutrons, and electrons make up an element's atom. Protons and electrons are distributed equally among neutral atoms. Gain or loss of electrons causes the formation of ions.

For the atom of magnesium: The neutral magnesium atom has 12 protons, 12 neutrons, and 12 electrons.

Regarding the magnesium ion:

It possesses two less electrons than the magnesium ion. As a result, there are 10 electrons, 12 protons, and 12 neutrons in each magnesium ion.

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Answer:B:12 12 10

Explanation:edge

why should care be taken tha tht easample is above the solvent level before the tlc plat eis placed into the devleioping hcambe

Answers

If the solvent level covers the sample, the sample spot will be washed off into the solvent before it travels up the TLC plate

The intermolecular interactions between the solvent and the solute are the main determinant of the solubility of the solute in a given solvent. The solute will dissolve in the solvent if the solvent surrounds and solvates the solute. In contrast to interactions between the solute and other solutes or between the solvent and other solvents, the solute must therefore create greater interactions with the solvent in order to dissolve. It is questionable if a homogeneous solution will develop in a mixture if the solvent-solute interactions are weaker than the solvent-solvent interactions and the solute-solute interactions.

why should care be taken tha tht easample is above the solvent level before the tlc plat eis placed into the devleioping hcambe

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can you identify the class of organic molecule to which these molecular structures and examples belong?

Answers

The correct class of molecules about which molecules and examples are: Carbohydrates involve starch and monosaccharide. • Lipids - triglycerides and fatty acid particles • Protein - amino acids and lactate. Nucleic acids (DNA and nucleotides)

1. Carbohydrates:. Components: one or even more monosaccharides. Functions: regulates electricity for cell, power storage, and plant tissue support Examples include glucose, glycogen, starch, and cellulose.

2. Lipids: Elements: fatty acid, glycerine, fat molecule• Functions: power storage, cellular membranes components, as well as hormones

3. Proteins: Amino group, carboxylate, R group, and amino acid • Function: enzyme, systemic protein, transport, interaction, immunity, storage • Lactose, hair, tendons, muscles, haematocrit, signal proteins, monoclonal antibody, egg albumin, receptor protein

4. Nucleic acids: Components have included a phosphate group, a nitrogeneous base, ribose or deoxyribose, and a nucleotide. Functions: heredity

Example: code for proteins, DNA, RNA

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Please help.
Check the answer that applies; there may be more than one answer.

Answers

The types of chemical reactions described by the given chemical equations are as follows:

Cu (s) + 2 AgNO₃ (aq) ---> 2 Ag (s) + Cu(NO₃)₂ (aq) : Single replacement reaction

C₃H₈ + 5 O₂ ------> 3 CO₂ + 4 H₂O : Combustion reaction

3 N₂H₄ ---> 4 NH₃ + N₂ : decomposition reaction

4 Fe + 3 O₂ --> 2 Fe₂O₃ : Combination reaction

Mg(OH)₂ + 2 HCI --> MgCl₂ + 2 H₂O : neutralization reaction

What are chemical reactions?

Chemical reactions are reactions in which chemical changes occur in the substances resulting in the formation of new products.

There are several types of chemical reactions and they include the following:

Combination - two or more substances combine to form a larger single productDecomposition -  a larger single compound breaks down into simpler productsSingle Replacement - an element or radical replaces another in a compoundDouble Replacement - exchange of ions between two compounds.Combustion - reaction of a substance with oxygen to release heat and lightNeutralization - reaction of acid and base to form salt and water.

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Given R = 0.0821L⋅atm/mol⋅K, what is the volume of a mole of gas at a pressure of 2.5 atm and a temperature of 250K?

Answers

The volume of the gas is obtained as 8.2 L

What is the volume of the gas?

We know that we can be able to obtain the volume  of the gas by the use of the process that can be identified with the ideal gas equation. In the ideal gas equation, we know that we can be able to see the relationship between the pressure, volume, temperature and number of moles of the gas.

Now we have to state out the parameters that have to do with the gas and we have the following;

Volume of the gas V = ?

Temperature of the gas T = 250 K

Gas constant R = 0.0821L⋅atm/mol⋅K,

Pressure of the gas P = 2.5 atm

We then have the formula for the ideal gas as;

PV = nRT

P = pressure

V = volume

R = constant

at = Temperature

Then we have;

V = nRT/P

V = 1 *  0.082 *  250/2.5

V = 8.2 L

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In order to urvive a a pecie, organim mut pa on their genetic information from one generation to the next. Thi i known a ______. Organim can pa on their genetic information through exual reproduction

Answers

In order to survive a a pieces, organism must pa on their genetic information from one generation to the next. This is known a genetic inheritance.. Organism can pa on their genetic information through Sexual reproduction

What is Genetic Inheritance?

Chromosomes are where genes are found. Genes, or their alleles, are found on each of the pairs of chromosomes, which are arranged in pairs.

Each chromosome ends up in a distinct cell as the cell divides in half. This occurs when sperm and egg cells develop during meiosis. Additionally, the genes divided in half. Alleles are what these are. One of each homologous chromosome is present in meiotic products, but not both. A cycle of cell divisions known as meiosis produces haploid cells, which have half as many chromosomes as diploid cells.

After the egg and sperm combine, the pairings are restored, but their genetic makeup has changed. As a result, one allele is inherited from the mother, while the other is inherited from the father.

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Nuclear decay occurs according to first-order kinetics. How long will it take for a sample of titanium-45 to decay from 65.0 grams to 25.0 grams? The half-life of titanium-45 is 3.08 hours 2.15 hours 32.9 hours 5.13 hours

Answers

A sample of titanium-45 will degrade from 65 grams to 25 grams in 4.24 hours.

The formula for the half-life of a first-order reaction is = 0.693/k.

Half-life is 3.08 hours, given.

So k = 0.225

First order reaction rate is calculated using:

where k is the reaction rate and 0.225 is the reaction time

R' = 25g, the total quantity.

original quantity = 65g

With these parameters entered, we obtain t=4.24 hours.

As a result, a sample of titanium-45 will degrade from 65.0 grams to 25.0 grams in 4.24 hours.

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Sales, purchasing, and shipping documents are all considered examples of to an accounting system.a. Trueb. False Genetic variation among humans is relatively small when compared to other species. Where in the human genome does most of the diversity occur?. several clients arrive simultaneously at the emergency department after sustaining burn injuries in a house fire. which client will require the closest observation for signs of respiratory distress? 4/6 x 3/5 in the simplest form. Wright in each box which word go's into the box for science 2x - 7 + 3x + 10 > x - 6 + 8x - 11 PLEASE SOLVE "STEP BY STEP" AND SHOW ME THE WORK! thank you! loverdale Middle School is buying new helmets for the football team. Each helmet costs $89.95. How much money does the school spend if they buy 45 of these football helmets? Q 1: Write a function to measure the amortized cost of appending for Pythons list class.Q 2: Write functions for two primary operations in the Queue enqueue ( ) and dequeue ( ). In ______ teams, there is an expectation of increased productivity and quality of work life because employees are delegated greater authority and granted increased autonomy Multiple Choice Self-managed virtual problem solving c collaborate Maya's school held an aluminum collection program in which they collected aluminum and brought it to be recycled. In the first week, Maya collected 4/20 ib of aluminum and her friend Abigail collected 7/8 ib1. Which girl Collected more aluminum?2. How much aluminum did the two girls collect? refer to the total utility curve in the accompanying graph to answer the questions. a graph with utis on the vertical axis and quantity of the good consumed on the horizontal axis. both axes run from 0 to 9. the graph contains one curve labelled as a total utility. between the quantities of 0 and 4, the total utility curve is rising at an increasing rate. between the quantities of 4 and 6, the total utility curve rises at a decreasing rate. after a quantity of 6, the total utility curve begins to fall. utility is maximized when how many units of the good are consumed? in order to conduct an experiment, four subjects are randomly chosen from a group of 20 people . how many differenty groups of four subjects are pssoibke Solve x2 = 36 for x. Is it good to conne ct to nature or not 3 reason One thousand tickets are sold at $5 each. One ticket will be randomly selected and the winner will receive a color television valued at $375. What is the expected value for a person that buys one ticket?Multiple choice:-$4.62-$1.00$1.00$4.62 Which of the following equation correct represents the exponential population growth curve? A) dN/dt=rN; B) dN/dt= rN(K-N/K); C) Nt=N0et; D) both A and C PLEASE HELP ASAPA theme of The Village Blacksmith is people can take charge of their fate.Which lines from the poem best develop this theme?Responses:Toiling,rejoicing,sorrowing, / Onward through life he goesThus on its sounding anvil shaped / Each burning deed and thought.Thus at the flaming forge of life / Our fortunes must be wroughtThanks, thanks to thee, my worthy friend, / For the lesson thou hast taught! The Village Blacksmithby Henry Wadsworth LongfellowUnder a spreading chestnut-tree The village smithy stands;The smith, a mighty man is he, With large and sinewy hands;And the muscles of his brawny arms Are strong as iron bands.His hair is crisp, and black, and long, His face is like the tan;His brow is wet with honest sweat, He earns whateer he can,And looks the whole world in the face, For he owes not any man.Week in, week out, from morn till night, You can hear his bellows blow;You can hear him swing his heavy sledge, With measured beat and slow,Like a sexton ringing the village bell, When the evening sun is low.And children coming home from school Look in at the open door;They love to see the flaming forge, And hear the bellows roar,And catch the burning sparks that fly Like chaff from a threshing-floor.He goes on Sunday to the church, And sits among his boys;He hears the parson pray and preach, He hears his daughters voice,Singing in the village choir, And it makes his heart rejoice.It sounds to him like her mothers voice, Singing in Paradise!He needs must think of her once more, How in the grave she lies;And with his hard, rough hand he wipes A tear out of his eyes.Toiling,rejoicing,sorrowing, Onward through life he goes;Each morning sees some task begin, Each evening sees it close;Something attempted, something done, Has earned a nights repose.Thanks, thanks to thee, my worthy friend, For the lesson thou hast taught!Thus at the flaming forge of life Our fortunes must be wrought;Thus on its sounding anvil shaped Each burning deed and thought. the molecular shape of a covalent species is determined not only by the number of electron groups that join the atoms, but by the number of electron groups as well, since these electrons also occupy space. t or f Log is severe or acutepowerful is serious or acutepious is serious or acuteowner is serious or acutecommitment is serious or acutebeautiful is serious or acute In the example with maya and her bike, which of newton's three laws of motion is best illustrated? why?.