¿Qué es una fuente de luz secundaria?

Answer:

Explanation:

The Key results in the Lab guide are results that justify the reasons to either accept or reject a hypothesis.

To summarize data related to findings in an experiments we make use of diagrams that shows the relationship between the different data.

Although the Lab guide in the question is missing a general answer within the scope of your question is provided above

Key results in an experiment are either milestone results leading to the final result of an experiment or results obtained that might not be part of the experiment but very important to the success of the experiments. therefore results that leads to the acceptance or rejection of a hypothesis in an experiment is a key result.   while

The best way to summarize data related to findings is the use of diagrams. ( graphical representation of the relationships between data contained in an experiment )

Hence we can conclude that use of diagrams is the best way to show the relationship between different data related to experimental findings while key results are results that justifies the acceptance of a hypothesis.

The final temperature is  -124Celsius

Charles's Law is a fundamental gas law that describes the relationship between the volume and temperature of a gas at constant pressure. It states that the volume of a given amount of gas is directly proportional to its absolute temperature, provided that the pressure and the number of particles are held constant.

Give that;

V1/T1 = V2/T2

V1 = 420 ml

T1 =  25.0 + 273 = 298 K

V 2 = 210 ml

T2 = ??

Thus;

V1T2 = V2T1

T2 = V2T1/V1

= 210 ml *  298 K/420 ml

= 149 K or -124Celsius

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Monosaccharides have a carbon to hydrogen to oxygen ratio of 1:2:1.

The carbon to hydrogen to oxygen ratio in monosaccharides is typically 1:2:1. This means that for every carbon atom in a monosaccharide, there are two hydrogen atoms and one oxygen atom. This ratio is a characteristic feature of carbohydrates, including simple sugars like glucose, fructose, and galactose, which are all monosaccharides.

The most basic type of carbohydrates are monosaccharides, sometimes known as simple sugars. They serve as the building blocks or fundamental components of more complex carbohydrates like polysaccharides (long chains of monosaccharides) and disaccharides (two monosaccharides bonded together). The usual chemical formula for monosaccharides is (CH₂O)n, where "n" denotes the number of carbon atoms in the molecule.  

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Nuclear fusion in stars, such as our Sun, produces energy through the fusion of light atomic nuclei, mainly hydrogen, into heavier nuclei like helium. This fusion process releases a tremendous amount of energy.

Within the core of a star, where temperatures and pressures are extremely high, nuclear fusion takes place. The collisions between hydrogen atoms at such high temperatures provide the necessary energy to overcome electrostatic repulsion, enabling the fusion process.

In the proton-proton chain, the most common fusion process in stars, hydrogen nuclei combine to form helium nuclei through several reactions. The conversion of a small fraction of mass into energy, as described by Einstein's mass-energy equivalence, results in the release of energy in the form of gamma rays.

These high-energy photons interact with matter, gradually transforming into light and heat. This energy release sustains the star's stability by countering gravitational collapse and powers its luminosity for billions of years.

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The particle that makes the atom an unstable isotope is the neutron. When there is an excess or a deficiency of neutrons in an atom's nucleus, it becomes an unstable isotope.

Unstable isotopes are isotopes that decay and emit radiation until they reach a stable state. They are also known as radioactive isotopes. The radioactive isotopes are unstable and have an unpredictable lifespan because they have an unstable ratio of neutrons to protons. This excess of neutrons in the nucleus results in a greater electrostatic repulsion between protons, causing instability and eventually decay.Neutrons are the particles that are responsible for making atoms unstable isotopes. The excess or deficiency of neutrons in an atom's nucleus leads to an unstable state and eventually decay. Radioactive isotopes are important for various practical applications such as nuclear power, radiography, and cancer treatment.

Therefore, neutrons makes the atom an unstable isotope. The decay of unstable isotopes can be used for many practical applications such as nuclear power, radiography, and cancer treatment.

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The value of b in the equation \(\( f(t) = 85 \cdot b^t \)\) represents the decay factor of the radioactive substance. To determine the value of \( b \), we can use the information that the half-life of the substance is 21 years.

The half-life of a radioactive substance is the time it takes for half of the substance to decay. In this case, the half-life is 21 years, which means that after 21 years, the amount of the substance remaining will be half of the initial amount.

We can use this information to set up an equation:

\(\(\frac{1}{2} = b^{21}\)\)

To solve for b, we need to take the 21st root of both sides of the equation:

\(\(b = \left(\frac{1}{2}\right)^{\frac{1}{21}}\)\)

Using a calculator, we can evaluate this expression:

\(\(b \approx 0.965\)\)

Therefore, the value of b in the equation \(\( f(t) = 85 \cdot b^t \)\) is approximately 0.965.

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Answer:B

Explanation:

An ionic bond is formed between sodium and chlorine in sodium chloride. The correct flow chart is shown below.

The question is incomplete, the complete question is;

Complete the flow chart related to the ionic bond in sodium chloride-Atomic number,Electronic configuration of atoms,Electronic configuration of ion,Symbol of sodium ion .please help me to find the answer

The flow chart related to the ionic bond in sodium chloride is as follows;

Sodium is in group 1 of the periodic table. It contains 11 electrons as shown by its electronic configuration. It forms sodium ion by loss of one electron. Group 1 elements form an univalent positive ion.

Chlorine is in group 17 of the periodic table. It has 17 electrons. It forms chloride ion by gaining one electron leading to the formation of sodium chloride.

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When sulfur dioxide (SO2) and nitrogen oxides (NOX) are released into the atmosphere and carried by wind and air currents, acid rain is the volcanoes.

Thus, Nitric and sulfuric acids are created when the SO2 and NOX react with water, oxygen, and other substances. Then, before hitting the ground, they combine with water and other substances.

The majority of the SO2 and NOX that contribute to acid rain originates from burning fossil fuels, however a tiny amount comes from natural sources like volcanoes.  

Thus, When sulfur dioxide (SO2) and nitrogen oxides (NOX) are released into the atmosphere and carried by wind and air currents, acid rain is the volcanoes.

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Answer:

Firms produce goods and services,which they sell to households in return for revenue.

Answer: Goods and Services

Explanation:

The process of melting a crystalline solid can be

reversed if the liquid is cooled. The change from the liquid state

to the solid state is called freezing. As the liquid cools, it loses

thermal energy. As a result, its particles slow down and come

closer together. Attractive forces begin to trap particles and the

crystals of a solid begin to form.

"The total kinetic energy of all the particles in a sample of

matter is called thermal energy. Thermal energy, an extensive

property, depends on the number of particles in a substance as

well as the amount of energy each particle has. If either the

number of particles or the amount of energy in each particle

changes, the thermal energy of the sample changes. With identically sized

samples, the warmer substance has a greater thermal energy."

Answer:

94.4 Psi

Explanation:

Given that;

P1 = 105 psi

T1 = 25˚C + 273 =  298 K

P2 = ?

T2 = – 5˚C + 273 = 268 K

P1/T1 = P2/T2

P1 T2 = P2T1

P2 = P1T2/T1

P2 = 105 * 268/298

P2= 94.4 Psi

The flaw in Regina’s plan is that the time frame is unrealistic (option B).

Goal setting involves the development of an action plan designed in order to motivate and guide a person or group toward a goal, which is a result that one is attempting to achieve.

Effective goal setting lets you measure progress, overcome procrastination and visualize your dreams. However, setting goals is said to be effective when it is done in an adequate time frame.

According to this question, Regina identifies her goal and hastily writes it down as follows: I will make an A on my English literature term paper that is due next week.

This goal, although is great, is unlikely to be met because of the time frame. One cannot get an excellent result in something that lacks adequate preparation, which includes adequate time.

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Answer:

6) gary suffering from slimotosis

7) duration of rubbing seaweed/drinking dr. kelp

8) whether slimotosis gets cured or not

9) rubbing seaweed and drinking dr. kelp cures slimotosis

Explanation:

Answer:

See explanation

Explanation:

A simple test that will distinguish flour from sugar is to dissolve the unknown substance in water.

Sugar dissolves in water due to the presence of polar groups in the chemical structure of sugar that are capable of interaction with water.

Flour does not dissolve in water. It rather becomes suspended in water when agitated and settles at the bottom of the container when the suspension is left to stand.

the quest for additional mineral deposits has led to the underwater search for so-called massive sulfides, which are enormous concentrations of copper, some amount of gold and silver as well.

Many different resources are available for extraction in the deep sea, including silver, gold, copper, manganese, cobalt, and zinc. On the sea floor or underwater , these raw materials can be found in a variety of forms.

Deposits of minerals used in everyday life, such as copper, zinc, nickel, gold, silver, and phosphorus, can be found on the seafloor. These deposits form crusts on volcanic and other rocks, as well as nodules on abyssal plain sediment, and range in size from 3 to 10 centimeters (1 to 4 inches).

Seafloor massive sulfide (SMS) accumulations, also known as hydrothermal ore deposits or black smoker vents, establish when a magmatic heat source causes seawater to circulate through the ocean crust, leaching metals from the rocks.

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Complete question :

the quest for additional mineral deposits has led to the underwater search for so-called massive sulfides, which are enormous concentrations of:

a) gold.

b) silver.

c) copper.

d) gold, silver, and copper.

e) none of these.

Answer:6.02

Explanation:

Answer:

there are about 6 atoms in hydrogen

The temperature at the top of an atmosphere consisting of an ideal gas with constant density can be found using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Assuming the density of the gas is constant throughout the atmosphere, we can express the pressure as P = ρgh, where ρ is the density, g is the acceleration due to gravity, and h is the height.

Since the atmosphere is homogeneous, the pressure at the top (P_top) is the same as the pressure at the bottom (P_bottom), so we have P_top = P_bottom = ρgh.

Using the ideal gas law, we can write ρghV = nRT, where V is the volume of the gas.

Assuming the volume of the gas is constant, we can cancel out V, and rearranging the equation, we get T_top = (nRT_bottom)/(nR) = T_bottom.

Therefore, the temperature at the top of the atmosphere would be the same as the temperature at the bottom.

In practice, however, it is not possible for an atmosphere to have constant density all the way to the top. As we go higher in the atmosphere, the density decreases due to decreasing pressure and temperature. This is because gravity becomes weaker at higher altitudes. Therefore, in reality, the temperature would decrease as we move higher in the atmosphere.

So, while a homogeneous atmosphere with constant density all the way to the top cannot exist in practice, it can be considered as an idealized scenario for understanding certain aspects of atmospheric behavior.

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Answer:

FV = $3506.112

Interest = $506.112

Explanation:

We are given;

Annual deposit; A = $1000

Interest rate; i = 8% = 0.08

Number of years; n = 3

The value of the annuity after 3 years will be gotten from the formula;

FV = A[((1 + i)ⁿ - 1)/i](1 + i)

FV = 1000(((1 + 0.08)³ - 1)/0.08)(1 + 0.08)

FV = 1000(1.08⁴ - 1.08)/0.08

FV = $3506.112

Since you deposited $1000 each year, then after 3 years, total deposited = 3 × 1000 = $3000

Since FV = $3506.112, then interest = $3506.112 - $3000

Interest = $506.112

Answer:

boys have faster reaction than girls

Explanation:

that because the Y chromosome do not have the greater ability to resist reaction while the X does

Answer:

The state of matter is solid

Explanation:

Aluminum has greater hardness compared to salt. This is because the metallic crystal structure comprises a metallic lattice that is firmly packed in a uniform and orderly way.

These tightly-packed arrangements of metal atoms reduce the free movement of atoms and enable them to resist deformation when a force is applied. As a result, aluminum is highly hard and malleable. Salt, on the other hand, comprises ionic bonds that create a crystal structure in which cations and anions alternate in a pattern that is uniform and orderly. However, this crystal structure is not tightly packed, and the ions can easily shift and slide past each other when a force is applied. As a result, salt is brittle and easy to deform when exposed to a force.

Based on the crystal structure of metals versus ionic compounds, hardness, and brittleness are not the same because metals have a crystal lattice structure that is firmly packed, while ionic compounds have a crystal structure that is not tightly packed. As a result, metals are hard and malleable, while ionic compounds are brittle and can be easily deformed when a force is applied.

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A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, a reaction occured between ammonia gas and oxygen gas to produce nitrogen gas and water.

Based on the equation, 4 moles of ammonia requires 3 moles of oxygen gas to react.

This means that 3.53 moles of ammonia will require 3.53 × ¾ = 2.65 moles of oxygen gas.

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The concept of intermolecular forces is related to the attractive or repulsive forces between molecules that determine their physical properties.

The concept of intermolecular forces is related to the attractive or repulsive forces between molecules that determine their physical properties. There are different types of intermolecular forces, such as London dispersion forces, dipole-dipole interactions, and hydrogen bonds, which vary in strength and depend on the molecular structure and polarity. Generally, stronger intermolecular forces require more energy to overcome and separate the molecules, whereas weaker intermolecular forces require less energy.
A) High vapor pressure: This property belongs to weak intermolecular forces because it means that the molecules can easily escape from the liquid phase and become a gas. This happens when the intermolecular forces are not strong enough to hold the molecules together, and they can break apart and move freely.
B) High boiling point: This property belongs to strong intermolecular forces because it means that the molecules require a lot of energy to break the intermolecular bonds and transition from a liquid phase to a gas phase. This happens when the intermolecular forces are strong enough to keep the molecules together and resist the thermal energy that tries to separate them.
C) High viscosity: This property belongs to strong intermolecular forces because it means that the molecules are highly attracted to each other and resist flowing easily. This happens when the intermolecular forces are strong enough to create a high degree of cohesion and adhesion between the molecules, which impedes their movement and causes them to stick together.
d) High surface tension: This property belongs to strong intermolecular forces because it means that the molecules at the surface of a liquid are highly attracted to each other and create a tension that resists deformation. This happens when the intermolecular forces are strong enough to create a cohesive force between the molecules at the surface, which makes them behave as if they were under an elastic film.

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Answer:

It poisons animals, it coats reefs, and damages ecosystems.

Explanation:

It is the same principle with humans. If we drink oil ( the actual stuff from for example, Spindletop) we would get poisoned, and die. If we eat toothpaste over and over, we have to go to poison control so they can pump your stomach. If we drink cyanide, we will die. If we get poison in our food, we will either starve, try to fix it, or we get poisoned and die. If we were some fish, we might not be able to fix the water, so we starve, or we get poisoned.

It is the same lines as the animals, our pollution and oil floods our environment and we start to die.

Sponsered by: STAF

Save the Animals Foundation

Hope this helps!

I was kidding about the sponsership.

Answer:It is the same principle with humans. If we drink oil ( the actual stuff from for example, Spindletop) we would get poisoned, and die. If we eat toothpaste over and over, we have to go to poison control so they can pump your stomach. If we drink cyanide, we will die. If we get poison in our food, we will either starve, try to fix it, or we get poisoned and die. If we were some fish, we might not be able to fix the water, so we starve, or we get poisoned.It is the same lines as the animals, our pollution and oil floods our environment and we start to die.

Explanation:

Question a

Step 1

The average atomic mass of the element is calculated as:

--------------------

Step 2

Information provided:

Isotope 1:

10.0 % abundant and 23.8 amu.

Isotope 2:

40.0 % abundant and 24.6 amu.

Isotope 3:

25.8 amu, the % abundant = 100 % - 10.0 % - 40.0 % = 50.0 %

-----------------------

Step 3

Procedure:

Average atom mass = (10.0% x 23.8 amu + 40.0% x 24.6 amu + 50.0 % x 25.8 amu)/100 = 25.12 amu

Answer: 25.12 amu

Answer:

Volume will the gas occupy at \(70\) kPa \(= 5.71\)

Explanation:

As per the gas law

\(P_1V_1 = P_2V_2\)

Here

\(P_1 =\) initial pressure of the gas

\(P_2\) = final pressure of the gas

\(V_1 =\) Initial volume of the gas

\(V_2\) =  the final volume of the gas

here,

\(P_1 = 80\) kPa

\(V_1 = 5\) mL

\(P_2 = 70\)

Substituting the given values in above equation, we get -

\(80 * 5 = 70 * V_2\\V_2 = 5.71\)

Volume will the gas occupy at \(70\) kPa \(= 5.71\)