Name the phase change in each of these events: (c) Wet clothes dry on a summer day

Answers

Answer 1

The phase change occurs during evaporation. On a hot day, wet clothing is drying. A liquid becomes a gas when it evaporations.

During the process of evaporation, a liquid transforms into a gaseous phase that is not saturated with the evaporating substance. The term "vaporization of a liquid" refers to this process. Clothes start to dry as water vapor escapes from the fabric's surface.

What is evaporation?

A liquid turns into a gas through the process of evaporation. Raindrops that "vanish" on a hot day or damp clothing that dries in the sun are good examples of the phenomena. In these instances, the liquid water is evaporating into a gas known as water vapor rather than really dissipating. Global evaporation takes place.

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Related Questions

A sample of gas is held at constant temperature. The gas is in a container with a moveable piston. The gas is
compressed into a small volume. What will happen to the pressure?

Answers

Answer:

The pressure of the gas will increase.

Explanation:

This concept of change in state properties of gas, when compressed in a moveable piston-cylinder assembly, can be explained by using Boyle's law

Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume given that temperature remains constant.

Following this law, when the gas in the container is compressed to a smaller volume, the pressure will go up.

This is also because the gas is not free to move about without frequent collisions with itself and the walls of the container, due to the resulting smaller space after compression. Therefore, the force it exerts on the walls of the container and the frequency of collision are more.

2 QUESTIONS HELP NEEDED FAST
explanation not required BUT i want u to say the letter for which answer it is

Which clue would indicate that the lac operon is off?

Responses

A The repressor protein is attached to the DNA.

B The lac operon genes are exposed on the DNA.

C RNA polymerase is attached to the DNA.

D Lactose is present in the cell.

QUISTION 2 Refer to these diagrams to answer the question.

Which statement best describes how a cell can effectively use its resources with regard to the lac operon gene?

Responses

The cell blocks the expression of lactase at all times.

The cell only expresses lactase when lactose is absent.

The cell only expresses lactase when lactose is present.

The cell expresses lactase constantly.
.

Answers

The cell only expresses the lac operon genes when lactose is present, allowing it to effectively use its resources by only producing lactase when needed.

What is Cell?

Cell is the basic structural and functional unit of life. It is a small, membrane-bound organelle that contains the biological molecules such as DNA, proteins, carbohydrates, lipids and other molecules necessary for the cell to survive. Cells are the building blocks of all living organisms and there are many different types of cells, each with a specialized role in the body. Cells can vary in size and shape, but most are microscopic and consist of cytoplasm and a nucleus, surrounded by a cell membrane.

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Q2
Level 5
A parachute slows a skydiver from 85 m/s
45 m in 4.5 seconds? What is the
acceleration of the parachute?
D. -0.1 m/s²
Level 5

Answers

An object is said to be accelerated if there is a change in its velocity. The change in the velocity of an object could be an increase or decrease in speed or a change in the direction of motion. The acceleration of the parachute is -8.88 m/s².

The rate of change of velocity with respect to time is defined as the acceleration. It is a vector quantity which has both magnitude and direction. It is the second derivative of position and first derivative of velocity.

Acceleration = Vf - Vi / t

45 - 85 / 4.5 = -8.88 m/s²

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Place the following steps in the correct sequence: A) Recognizing a problem; B) Testing a hypothesis; C) Drawing inferences

Answers

1) A
2) C - an inference is similar to a guess
3) B - a hypothesis is similar to a theory, and you’re testing it

Answer:

1. Recognizing a problem.

2. Drawing inferences.

3. Testing a hypothesis.

Explanation:

First you need to find a problem, make an inference or a guess, and then you can test your hypothesis.

I hope it helps! Have a great day!

what do microevolution and macroevolution have in common? How do they differ?

Answers

Microevolution and macroevolution are both processes of evolution, but they differ in scale.

What makes them different?

Microevolution refers to changes in allele frequencies within a population over time, while macroevolution refers to changes in the genetic makeup of a species or group of species over a long period of time.

Microevolution is driven by four main processes: mutation, gene flow, genetic drift, and natural selection. Mutations refer to alterations in an organism's DNA. Gene flow entails the transfer of genes between different populations. Genetic drift is the unpredictable fluctuation in allele frequencies within a population. Natural selection involves the varied survival and reproduction of individuals based on specific traits they possess.

Macroevolution is thought to be the result of many small changes in allele frequencies that accumulate over time. These changes can lead to the emergence of new species, the extinction of old species, and the diversification of life on Earth.

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which energy is found in the nucleus of an atom?

Answers

It is called nuclear energy.

Answer:

Nuclear energy.

Explanation:

It's the energy that holds protons and neutrons ( nucleons ) together, hence holds the nucleus as one.

need help what is the formula

Answers

The formula for the compound depicted in the image above is Al₂O₃ (option D).

What is molecular formula?

Chemical or molecular formula is a notation indicating the number of atoms of each element present in a compound.

The chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

According to this question, two atoms of aluminium and three atoms of oxygen were given. This means that when they chemically combine, the chemical formula of the resulting molecule will be Al₂O₃.

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circle a represents a unit volume of 100. ml of a solution. which circle (b, c, or d) best represents the unit volume after 300. ml of solvent has been added?

Answers

Circle b represents the solution after 300 mL of solvent has been added.

Volume percent = {Volume of solute / volume of solution} x 100

After adding the solution, the volume of solution increases but volume of solute remains the same. For same volume of solute, the volume percent is high for once which has the volume of solution is low.

In 100 mL the visually represented solution has 12 balls for solute. When 300 mL of solution is added to the solute, the total volume is 400 mL volume is increased 4 times. Then 12/4 = 3 is the number of solute present in the circle. Circle b represents the solution.

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circle a represents a unit volume of 100. ml of a solution. which circle (b, c, or d) best represents

How many moles of calcium are present in 204 grams of calcium?

Answers

R. F.M (Relative Formula Mass ) of Ca=40

40g of Ca=1 mole

204g of Ca=(1*204)/40

=5.1 moles

What is the equilibrium constant for the chemical equation:

1. N2 (g) + 3H2 (g) ↔ 2NH3 (g)

At equilibrium, the concentration of N2 is 2.5 x 10-4 M, the concentration of H2 is 6.4 x 10-3 M, and the concentration of NH3 is 5.3 x 10-2 M.

Write out the equilibrium constant, Keq, and show you work.

2. Mg3P2 (s) ↔ 3Mg+2 (aq) + 2P-3 (aq)

At equilibrium, the concentration of Mg3P2 is 5.5 x 10-6 M, the concentration of magnesium ions is 7.2 x 10-5 M, and the concentration of phosphide ions is 9.8 x 10-8 M.

Write out the equilibrium constant, Keq, and show you work.

Answers

Answer:

beaner

Explanation:

Answer:

x= 1 /5 y+ 4 /5

Explanation:

Let's solve for x.

10x−2y=8

Step 1: Add 2y to both sides.

10x−2y+2y=8+2y

10x=2y+8

Step 2: Divide both sides by 10.

10x /10 = 2y+8 /10 x= 1 /5 y+ 4 /5

what is the boiling-point change for a solution containing 0.251 mol of naphthalene (a nonvolatile, nonionizing compound) in 250. g of liquid benzene? ( k bp = 2.53°c/ m for benzene)

Answers

The boiling-point change for a solution containing 0.251 mol of naphthalene (a nonvolatile, nonionizing compound) in 250. g of liquid benzene is 2.54°C.

To find the boiling-point change for this solution, we first need to calculate the molality of the solution using the given information.

Molality (m) = moles of solute / mass of solvent in kg

Mass of solvent = 250 g = 0.25 kg

Moles of naphthalene = 0.251 mol

Molality = 0.251 mol / 0.25 kg = 1.004 m

Next, we can use the formula:

ΔTb = Kb x m

where ΔTb is the boiling-point elevation, Kb is the molal boiling-point elevation constant (2.53°C/m for benzene), and m is the molality of the solution.

ΔTb = 2.53°C/m x 1.004 m = 2.54°C

Therefore, the boiling-point change for this solution is 2.54°C.

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List as many things as you can see in the picture below

Abiotic (Non-Living)___________Biotic (Living)

__________________ ................ ___________________ __________________ ................ ___________________
___________________ ___________________

Answers

abiotic: biotic
rocks animals
water plants
air fungi
sunlight bacteria
minerals
soil

What atom matches this electron configuration?
1s22s22p63s2 3p64s23d104p65s24d105p66s24f145d9

Mercury

Thallium

Gold

Platinum

Answers

Answer:

Gold

Explanation:

To recognize what element this is, we can simply look at the last orbital (5d9) and go to the periodic table and see what element is in that final orbital.

We go to row 6 (because of the 6s orbital at the beginning of this row) and then we see that our 6s orbital is full with 2 electrons, then our 4f orbital is full with 14 electrons, and our 5d orbital is not full where we only have 9 electrons instead of 10.

We then go to our 5d orbital and count 9 times into that orbital and end up with our final element being Gold (Au).

adding pure water to a saturated solution (with no solids) would cause the concentration of that solution to

Answers

The concentration of the saturated solution would initially remain the same (C) when pure water is added.

Determine the saturated solution?

A saturated solution is one in which the maximum amount of solute has been dissolved in a given amount of solvent at a specific temperature. In this case, the solution is already saturated, which means it has reached its maximum concentration.

When pure water is added to the saturated solution, it dilutes the concentration of the solute. However, since the solution was initially saturated, adding more solvent does not result in additional solute dissolving. The excess water simply fills the space between the solute particles without affecting their concentration.

Therefore, the concentration of the solution remains the same initially. It's important to note that if more solute is added or if the solution is left undisturbed, the added water may eventually dissolve more solute, increasing the concentration. However, at the moment of adding pure water to a saturated solution, the concentration remains unchanged.

Hence, (C) When pure water is added to a saturated solution, the initial concentration of the solution remains unchanged.

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Complete question here:

Adding pure water to a saturated solution (with some solids) would cause the concentration of that solution to initially?

A) increase

B) Decrease

C) Remain the same

a sample of a molecular compound was analyzed and found to contain 0.707 grams carbon (c), 0.2372 grams of hydrogen (h). determine the empirical formula of the compound. given the added information that the molar mass of the compound is 8 times the empirical mass, determine the molar mass of the compound.

Answers

The molar mass of the compound is 128.4 g/mol.

The empirical formula is an empirical formula that represents the lowest whole-number ratio of the atoms present in a compound. The empirical formula for the molecular compound is calculated using the percentage composition of the elements present in the compound. The steps used to find the empirical formula are as follows:

Find the mass of each element present in the compound.Convert each mass to moles.Divide each mole value by the smallest number of moles.Round to the nearest whole number and write the subscripts.The molar mass is the mass of a substance that contains 6.02 × 10²³ atoms or molecules. To calculate the molar mass of a compound, add the masses of all the atoms present in the compound.

C=0.707g,12.01 g/mol=0.0588 molCnH=0.2372 =1.01g/m=0.235 mol H

nH=4nC

The empirical formula of the compound is CH4. The molar mass of the compound can be calculated using the empirical formula.

M=12.01 g/mol+4(1.01 g/mol)=16.05 g/mol

The molar mass of the compound is 8 times the empirical mass, so the actual molar mass is;

M=8(16.05{g/mol})=128.4g/mol. The molar mass of the compound is 128.4 g/mol.

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nitration of methyl benzoate how to create more electrophile ?

Answers

Nitration is the process by which an nitro group (-NO2) is introduced to a chemical compound. Electrophile is a molecule that has a tendency to acquire electrons and hence it is attracted towards the electron-rich centers to neutralize the charge imbalance.

During the nitration of methyl benzoate, the reaction is carried out with nitronium ion (NO2+), which is highly electrophilic and attacks the aromatic ring. The nitration of methyl benzoate occurs in the presence of a mixture of concentrated sulfuric acid and concentrated nitric acid (nitrating mixture).The nitrating mixture is used to prepare the nitronium ion, NO2+. This is the electrophile which carries out the nitration of methyl benzoate.Nitronium ion is formed as follows: HNO3 + H2SO4 → NO2+ + HSO4− + H2OWhen sulfuric acid is added to nitric acid, the acid becomes protonated and undergoes an equilibrium reaction as shown below:HNO3 + H2SO4 ⇌ NO2+ + HSO4− + H2OThe product that is formed is nitronium ion, NO2+. Thus, by adding sulfuric acid, the concentration of NO2+ increases which increases the electrophilicity and leads to the formation of more electrophile. Therefore, the concentration of the nitronium ion can be increased by adding more sulfuric acid to the reaction mixture, which will make the solution more acidic, increasing the amount of nitronium ion, NO2+.

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A moon of mass m and radius a is orbiting a planet of mass m and of radius b at a distance d (center-to-center) in a circular orbit.

Answers

The expression for the total mechanical energy E of the moon in terms of m, M, d, and the gravitational constant G is given as $-\frac{1}{2} G\frac{Mm}{d}$. The gravitational force being conservative.

What is the gravitational force?

The gravitational force is the universal force of attraction, which is acting between objects.

Its work integral over any given trajectory joining the points A and B yields the same result. Hence, it can be associated with a potential function. The gravitational potential energy between point masses m1 and m2 separated by a distance r is,

E = -G x m1m2/r

The moon orbits the planet with an orbital radius d The total energy in the orbit equals, E= Egp + K.

The sum of the gravitational potential energy and the kinetic energy due to its circular motion.

the gravitational force exerted by the planet on the moon equals the product of the moon's mass and the centripetal acceleration.

Substituting the force and the centripetal acceleration,

G* Mm/ d2=mv2 *d

The squared velocity is then given as ,

v^2 = G* M/ d

Substituting this result in the kinetic energy,

K =1/2 *mv^2 =1/2 * G* Mm/d

.The total energy is then, -$\frac{1}{2} G\frac{Mm}{d}$.

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Complete question :

A moon of mass m and radius a is orbiting a planet of mass M and of radius b at a distance d (center-to-center) in a circular orbit. Derive an expression for the total mechanical energy E of the moon in terms of m, M, d, and the gravitational constant

which is the best colored indicator to use in the titration of 0.1 m ch3cooh(aq) with naoh(aq)? why? look up ka values in the appendix. indicator pka bromocresol green 4.8 bromothymol blue 6.8 phenolphthalein 9.2 group of answer choices