An illustration of a fire and a pair of hands near the fire.
He concluded that the image shows thermal energy being transferred from the flames to the person’s hands through conduction.

Which best explains Alex’s error?

Thermal energy is being transferred from the person’s hands to the flames.
The image does not show thermal energy being transferred because the molecules of two substances or objects are not in direct contact.
The image does not show conduction because the molecules of two substances or objects are not in direct contact.
Thermal energy is being transferred from the surrounding air to the flames.

Answer:

Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.

Explanation:

Answer:

400ml

Explanation:

Answer:

Location x is experiencing daytime because it is facing directly to the sun.

Explanation:

From a background understanding of the solar system, the side of the planet facing the sun will be experiencing daytime while the other side of the planet will be experiencing either partial or total darkness depending on the location.

From the diagram given above, we can see clearly that location x is facing the sun and as such, light rays from the sun lightens the location. When this happens, location x will be experiencing daytime.

In conclusion, location x is experiencing daytime because it is facing directly to the sun.

Answer:

For (a): The substances are known as acids and bases.

For (b): The color of the litmus for pH = 10 will be blue.

For (c): The color of the litmus for pure water will be purple.  

Explanation:

pH determines the acidity or basicity of a solution. There are three types of solution classified based on the pH:

Litmus paper is used as an indicator to know the type of solution. There are 2 types of litmus paper:

(a):

An acid is defined as the chemical species that produces hydrogen ions in the solution while a base is defined as the chemical species that produces hydroxide ions in the solution.

(b):

Given pH value = 10

The solution is basic in nature, thus the color of litmus will be blue.

(c):

Pure water is neutral in nature and has a pH of 7.

Thus, the solution of litmus would be purple.

1. Accept and celebrate differences. One of the biggest challenges we experience in relationships is that we are all different. We can perceive the world in many ways. Certainly astumbling block that we come across when we try to build relationships is a desire or an expectation that people will think like we do and, in this way, it is so much easier to create a rapport. We feel more comfortable when we feel that people “get” us and can see our point of view. Life, however, would be very dull if we were all the same and, while we may find it initially easier, the novelty of sameness soon would wear off. So accepting and celebrating that we are all different is a great starting point.

2. Listen effectively. Listening is a crucial skill in boosting another person’s self-esteem, the silent form of flattery that makes people feel supported and valued. Listening and understanding what others communicate to us is the most important part of successful interaction and vice versa.

Active or reflective listening is the single most useful and important listening skill. In active listening, we also are genuinely interested in understanding what the other person is thinking, feeling, wanting, or what the message means, and we are active in checking out our understanding before we respond with our own new message. We restate or paraphrase our understanding of their message and reflect it back to the sender for verification. This verification or feedback process is what distinguishes active listening and makes it effective.

3. Give people your time. Giving time to people is also a huge gift. In a world where time is of the essence and we are trying to fit in more than one lifetime, we don’t always have the time to give to our loved ones, friends, and work colleagues. Technology has somewhat eroded our ability to build real rapport and we attempt to multi-task by texting and talking at the same time.

Being present in the time you give to people is also important, so that, when you are with someone, you are truly with someone and not dwelling in the past or worrying about the future. The connection we make with other people is the verytouchstone of our existence, and devoting time, energy, and effort to developing and building relationships is one of the most valuable life skills.

Answer:

Eutrophication is the enrichment of a body of water with excessive nutrients (nitrogen and phosphorus), which causes algal growth and subsequent decline of dissolved oxygen after decomposition.

Answer:

Initial temperature, T1 = 15°C

Explanation:

Given the following data;

Initial volume, V1 = 250 mL to Liters = 250/1000 = 0.25 L

Final temperature, T2 = 30°C

Final volume, V2 = 0.5 L

To find the initial temperature T1, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Making T1 the subject of formula, we have;

[tex] T_{1}= \frac{V_{1}}{V_{2}} * T_{2}[/tex]

Substituting into the formula, we have;

[tex] T_{1}= \frac{0.25}{0.5} * 30[/tex]

[tex] T_{1}= 0.5 * 30 [/tex]

Initial temperature, T1 = 15°C

Answer:

Use friction

Explanation:

Friction is the force that stops something in motion. It also heats up something, creating a gravitational heat! A match striked against the lighter will create a flame, because of friction :)

Answer:

you siad i can answer with anything :)

Answer:

red

Explanation:

red shows if solution is acidic

Answer: The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.

Explanation:

Atomic number is equal to the number of protons or number of electrons for a neutral species and is specific to a particular element.

Mass number is the sum of number of protons and the number of neutrons.

Here the atomic number of Argon is 18 , thus the number of protons is 18 and thus the number of electrons is also 18.

The given mass number is 40. Thus number of neutrons = (40 - 18) = 22.

The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.

Answer:

amylase

Explanation:

Answer:

Let's say you're using joules. In that case, you'd need 153.7kJ.

What are the answers? I assume you meant to attach a photo.

Answer:

Thus, the one that is an example of mimicry that enables prey species to avoid predation is a harmless organism imitating the look of a harmful one (option B).

Explanation:

Answer:

There are 5 steps/rules of the ideal gases based on kinetic theory.

Explanation:

1. Particles in a gas are constant moving in random motion.

2. combined volume of the particles is negligible.

3. particles exert no forces on one another

4. any collisions between the particles are completely elastic

5. the average kinetic energy of particles is proportional to temperature in kelvins.

(I had help explaining steps from Sal Khan. I hope this helps! Have a great day!)

Answer:

the acid used to neutralize the base in oder to form a salt and water

Answer:

p wave

Explanation:

The P wave is designated the primary preliminary wave because it is the first to arrive at a seismic station after an earthquake. It travels at a speed usually less than 6 kilometers per second in the Earth's crust and jumps to 13 kilometers per second through the core.

Answer:

The range of values of some property

Explanation:

A.pex, and the comments on the other answer

The best defines a spectrum is The range of values of some.

A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism. As scientific understanding of light advanced, it came to apply to the entire electromagnetic spectrum. It thereby became a mapping of a range of magnitudes (wavelengths) to a range of qualities, which are the perceived "colors of the rainbow" and other properties which correspond to wavelengths that lie outside of the visible light spectrum.

Spectrum has since been applied by analogy to topics outside optics. Thus, one might talk about the "spectrum of political opinion", or the "spectrum of activity" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. Nonscientific uses of the term spectrum are sometimes misleading. For instance, a single left–right spectrum of political opinion does not capture the full range of people's political beliefs. Political scientists use a variety of biaxial and multiaxial systems to more accurately characterize political opinion.

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Answer:

Aufbau Principle: Electrons occupy orbitals of lower energy first.

Pauli Exclusion Principle: An orbital can hold only two electrons and they must have opposite spin.

Hund's Rule: Electrons fill each orbital singly before any orbital gets a second electron.

Answer:

1.5×10^4

Explanation:

Pressure= force/area

P= 600/0.04

P= 15000

P= 1.5×10^4

Answer:

Like signs.

Explanation:

When two charges are like signs, a repelling force will occur.

Answer:

a) pH = 13.447

b) pH = 13.176

Explanation:

Ba (OH)₂ is a strong base and ionizes completely in solution to give barium amend hydroxide ions.

The equation of the dissociation of Ba(OH)₂ is given below:

Ba(OH)₂ ----> Ba2+ + 2OH-

1 mole of Ba(OH)₂ produces 2 Moles of OH- ions

a) Before the addition of HCl, i.e.,when 0.00 mL of HCl has been added;

Concentration of hydroxide ions, [OH-] = 0.140 x 2 = 0.a) [OH-] = 0.100 x 2 = 0.280

pOH = -log [OH-]

pOH = -log (0.280)

pOH = 0.553

pH = 14 - 0.553= 13.447

b) pH when 15.0 mL HCl has been added

Moles Ba(OH)₂ = concentration × volume

Volume of Ba(OH)₂ = 82.0 mL = 0.082 L, concentration = 0.140 M

moles of Ba(OH)₂ = 0.082 x 0.140 = 0.01148 moles

moles OH- produced by 0.01148 moles of Ba(OH)₂ = 2 x 0.01148= 0.02296

moles HCl = 0.0150 L x 0.560 = 0.0084

moles of H+ produced by 0.0084 HCl = 0.0084

0.0084 H+ willnreact with 0.0084 moles of OH-

moles OH- left after the reaction = 0.02296 - 0.0084 = 0.01456 moles

total volume of new solution = (82 +15) mL = 97 mL => 0.097 L

Concentration of OH- ions = moles / volume

[OH-] = 0.01456 / 0.097 = 0.1501

pOH = -log [OH-]

pOH = -log (0.150)

pOH = 0.824

pH = 14 - 0.824

pH = 13.176

The statement which best defines the theoretical yield of a reaction is the maximum amount of product that can be obtained.

Yield of any chemical reaction gives idea about the amount of product that will be produced by the chemical reaction between reactants.

Theoretical yield gives idea about the how much maximum yield of any product will be produced in the given chemical reaction by using the stoichiometry of the reaction.

Hence theoretical yield is the maximum amount of product that can be obtained.

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Answer:

Big False

Explanation:

As the magnets get closer, the stronger the magnetic field. The farther away, the less strength the field exhibits.

Answer:

B. Ionic Compound

Explanation:

An ionic compound is that compound which contains a positively charged ion called CATION and a negatively charged ion called ANION. The cation loses or transfers electrons to the anion, hence, making the former (cation) positive and the latter (anion) negative.

A polyatomic ion is an ion that contains more than one type of atom e.g OH-, NO3²-, CO3²- etc. A polyatomic ion usually has an overall charge formed from the charges of the individual atoms that makes it up. For example, in OH-, the overall charge is -1.

Since a polyatomic ion can have an overall positive or negative charge, it must enter a reaction with another ion that complements it i.e. a negative polyatomic ion will react with a positive ion to neutralize its charge. Hence, this forms an IONIC COMPOUND. This is why most compounds with polyatomic ions are IONIC COMPOUNDS.

For example, CaCO3 is an ionic compound formed when Ca²+ (cation) reacts with the polyatomic anion: CO3²-

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Answer: according to ck12.org "Heat is the sum of all the kinetic energies of all the molecules of an object, while temperature is the average kinetic energy of the molecules of an object."

Explanation:

I hope this helped!

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Answer:

The correct answer on edge for 2021 is C. None.

Explanation:

We know this is correct because the solution is heterogenous after it has been stirred: the substance is not soluble in water.

The solution is heterogeneous after it has been stirred. The cornstarch is not soluble in water. Therefore, option C is correct.

Any mixture of one or more solutes that have been dissolved in a solvent is referred to as a solution. To create a homogenous mixture, a solute must dissolve in a solvent. To create a homogenous mixture, a solute must dissolve in a solvent.

Whereas homogenous mixtures seem consistent throughout, heterogeneous mixtures have clearly discernible components. A solution, which can be a solid, liquid, or gas, is the most typical kind of homogenous mixture.

No matter how you sample a homogenous solution, it often has the same characteristics. Sources of water, saline solution, certain metals, and bitumen are homogenous mixes. Examples of heterogeneous combinations are chicken noodle soup, sand, and oil, and water.

Thus, option C is correct.

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